feat: Implement batch performance analysis dialog and routing policies

- Added BatchAnalysisDialog for running multiple simulations and generating reports.
- Implemented LeastCongestedRouteSelector for dynamic routing based on congestion levels.
- Created RandomRouteSelector for baseline random routing strategy.
- Developed ShortestPathRouteSelector to select routes based on the shortest path.
- Defined RouteSelector interface to standardize routing policy implementations.
- Introduced RoutingPolicy enum to manage available routing strategies.

.github/workflows/maven.yml

@@ -1,8 +1,9 @@
 name: Java CI with Maven
 
 on:
+  workflow_dispatch:
   push:
-    branches: [ "main" ]
+    branches: [ "dev", "cleanup" ]
     tags:
       - 'v*.*.*'
   pull_request:
@@ -11,51 +12,93 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-
     steps:
     - uses: actions/checkout@v4
-
     - name: Set up JDK 17
       uses: actions/setup-java@v4
       with:
         java-version: '17'
         distribution: 'temurin'
         cache: maven
-
     - name: Build with Maven
       run: mvn -B package
       working-directory: main
-
     - name: Upload built JAR
       uses: actions/upload-artifact@v4
       with:
         name: package
         path: main/target/*.jar
-
     - name: Generate dependency graph
       run: mvn -B -f main/pom.xml com.github.ferstl:depgraph-maven-plugin:4.0.1:graph
-
     - name: Upload dependency graph artifact
       uses: actions/upload-artifact@v4
       with:
         name: dependency-graph
         path: main/target/**
 
+  build-windows:
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven (Skip Tests)
+      run: mvn -B package -DskipTests
+      working-directory: main
+    - name: Create JPackage App Image
+      shell: pwsh
+      run: |
+        New-Item -ItemType Directory -Force -Path "dist"
+        jpackage --name "DTSS" `
+          --input main/target `
+          --main-jar main-1.0-SNAPSHOT.jar `
+          --dest dist `
+          --type app-image `
+          --win-console
+    - name: Inject java.exe
+      shell: pwsh
+      run: |
+        $javaPath = (Get-Command java).Source
+        Copy-Item -Path $javaPath -Destination "dist/DTSS/runtime/bin/"
+    - name: Zip Windows Release
+      shell: pwsh
+      run: |
+        Compress-Archive -Path "dist/DTSS" -DestinationPath "dist/DTSS-Windows.zip"
+    - name: Upload Windows Artifact
+      uses: actions/upload-artifact@v4
+      with:
+        name: windows-package
+        path: dist/DTSS-Windows.zip
+
   publish-release:
     runs-on: ubuntu-latest
-    needs: [build]
+    needs: [build, build-windows]
-    if: startsWith(github.ref, 'refs/tags/')
+    if: startsWith(github.ref, 'refs/tags/') || github.event_name == 'workflow_dispatch'
     permissions:
       contents: write
-
     steps:
-    - name: Download built JAR
+    - name: Download Linux JAR
       uses: actions/download-artifact@v4
       with:
         name: package
         path: main/target/
-
+    - name: Download Windows Zip
+      uses: actions/download-artifact@v4
+      with:
+        name: windows-package
+        path: windows-dist/
     - name: Create GitHub Release
       uses: softprops/action-gh-release@v2
       with:
-        files: main/target/*.jar
+        tag_name: ${{ startsWith(github.ref, 'refs/tags/') && github.ref_name || 'snapshot-build' }}
+        name: ${{ startsWith(github.ref, 'refs/tags/') && github.ref_name || 'Manual Snapshot Build' }}
+        draft: false
+        prerelease: true
+        make_latest: false
+        files: |
+          main/target/*.jar
+          windows-dist/*.zip

.gitignore

@@ -3,6 +3,9 @@
 
 # Log files
 *.log
+*.trace
+logs
+*.md
 
 # BlueJ files
 *.ctxt
@@ -48,3 +51,9 @@ build/
 # Other
 *.swp
 *.pdf
+
+# JAR built pom file
+dependency-reduced-pom.xml
+
+# Python env
+venv/

README.md

@@ -1,620 +0,0 @@
-# Sistema de Simulação de Tráfego Distribuído
-
-Sistema distribuído de simulação de tráfego.
----
-
-## Índice
-
-- [Visão Geral](#visão-geral)
-- [Arquitetura](#arquitetura)
-- [Protocolo de Comunicação](#protocolo-de-comunicação)
-- [Estrutura do Projeto](#estrutura-do-projeto)
-- [Instalação e Execução](#instalação-e-execução)
-- [Documentação](#documentação)
-- [Desenvolvimento](#desenvolvimento)
-
----
-
-## Visão Geral
-
-Este projeto implementa uma simulação distribuída de tráfego veicular numa rede de cruzamentos. O sistema utiliza:
-
-- **Processos independentes** para cada cruzamento
-- **Threads** para controlar os semáforos dentro de cada cruzamento
-- **Comunicação via sockets** para transferência de veículos entre cruzamentos
-- **Simulação de eventos discretos** (DES) para gerir o tempo de simulação
-
-### Características Principais
-
-- Simulação determinística e reproduzível
-- Comunicação assíncrona entre processos
-- Protocolo de mensagens baseado em JSON
-- Dashboard em tempo real (planeado)
-- Estatísticas detalhadas de desempenho
-
----
-
-## Arquitetura
-
-### Visão Geral do Sistema
-
-```
-┌─────────────────────────────────────────────────────────────────┐
-│                    SISTEMA DISTRIBUÍDO                           │
-├─────────────────────────────────────────────────────────────────┤
-│                                                                   │
-│  ┌──────────────┐                          ┌──────────────┐     │
-│  │  Coordenador │ ────────────────────────>│  Dashboard   │     │
-│  │  / Gerador   │                          │              │
-│  └──────┬───────┘                          └──────▲───────┘     │
-│         │                                          │             │
-│         │ Gera veículos                    Stats  │             │
-│         │                                          │             │
-│         ▼                                          │             │
-│  ┌─────────────────────────────────────────────────┴──────┐     │
-│  │          Rede de Cruzamentos (Processos)              │     │
-│  │                                                         │     │
-│  │  ┌────┐         ┌────┐         ┌────┐                 │     │
-│  │  │Cr1 │◄───────►│Cr2 │◄───────►│Cr3 │                 │     │
-│  │  └─┬──┘         └─┬──┘         └─┬──┘                 │     │
-│  │    │              │              │                     │     │
-│  │    │         ┌────▼────┐         │                     │     │
-│  │    └────────►│   Cr4   │◄────────┘                     │     │
-│  │              └────┬────┘                               │     │
-│  │                   │                                     │     │
-│  │              ┌────▼────┐                               │     │
-│  │              │   Cr5   │                               │     │
-│  │              └────┬────┘                               │     │
-│  └───────────────────┼─────────────────────────────────────┤     │
-│                      │                                     │     │
-│                      ▼                                     │     │
-│               ┌──────────────┐                            │     │
-│               │  Nó de Saída │                            │     │
-│               │      (S)     │                            │     │
-│               └──────────────┘                            │     │
-│                                                            │     │
-└────────────────────────────────────────────────────────────┘     │
-```
-
-### Componentes
-
-1. **Coordenador/Gerador**: Gera veículos e injeta no sistema
-2. **Cruzamentos (Cr1-Cr5)**: Processos independentes que gerem tráfego local
-3. **Nó de Saída (S)**: Recolhe estatísticas de veículos que saem do sistema
-4. **Dashboard Server**: Agrega e exibe dados em tempo real
-
----
-
-## Protocolo de Comunicação
-
-### Formato de Serialização: JSON (Gson)
-
-O sistema utiliza JSON como formato de serialização por ser mais rápido, seguro e legível que a serialização em Java.
-
-### Estrutura de Mensagens
-
-Todas as mensagens seguem o formato base:
-
-```json
-{
-  "messageId": "uuid",
-  "type": "MESSAGE_TYPE",
-  "senderId": "sender_id",
-  "destinationId": "destination_id",
-  "timestamp": 1729595234567,
-  "payload": { ... }
-}
-```
-
-### Tipos de Mensagens
-
-#### 1. VEHICLE_TRANSFER
-
-Transfere um veículo entre cruzamentos.
-
-**Estrutura:**
-```json
-{
-  "messageId": "a3c5e7f9-1234-5678-90ab-cdef12345678",
-  "type": "VEHICLE_TRANSFER",
-  "senderId": "Cr1",
-  "destinationId": "Cr2",
-  "timestamp": 1729595234567,
-  "payload": {
-    "id": "V123",
-    "type": "LIGHT",
-    "entryTime": 15.7,
-    "route": ["Cr1", "Cr2", "Cr5", "S"],
-    "currentRouteIndex": 1,
-    "totalWaitingTime": 3.2,
-    "totalCrossingTime": 1.8
-  }
-}
-```
-
-**Fluxo:**
-1. Veículo completa travessia no Cr1
-2. Cr1 serializa mensagem VEHICLE_TRANSFER
-3. Envia para Cr2 via socket
-4. Cr2 desserializa e adiciona veículo à fila
-
-#### 2. STATS_UPDATE
-
-Envia estatísticas de um cruzamento para o Dashboard.
-
-**Estrutura:**
-```json
-{
-  "messageId": "b4d6e8f0-2345-6789-01bc-def123456789",
-  "type": "STATS_UPDATE",
-  "senderId": "Cr3",
-  "destinationId": "Dashboard",
-  "timestamp": 1729595234789,
-  "payload": {
-    "intersectionId": "Cr3",
-    "queueLengths": {
-      "North": 5,
-      "South": 3,
-      "East": 7,
-      "West": 2
-    },
-    "vehiclesProcessed": 142,
-    "averageWaitTime": 4.5,
-    "currentTime": 123.45
-  }
-}
-```
-
-**Frequência:** A cada 10 segundos (configurável)
-
-#### 3. VEHICLE_EXIT
-
-Notifica quando um veículo sai do sistema.
-
-**Estrutura:**
-```json
-{
-  "messageId": "c5e7f9a1-3456-7890-12bc-def123456789",
-  "type": "VEHICLE_EXIT",
-  "senderId": "Cr5",
-  "destinationId": "ExitNode",
-  "timestamp": 1729595234890,
-  "payload": {
-    "id": "V123",
-    "type": "LIGHT",
-    "entryTime": 15.7,
-    "exitTime": 45.2,
-    "totalSystemTime": 29.5,
-    "totalWaitingTime": 8.3,
-    "totalCrossingTime": 4.8,
-    "routeTaken": ["Cr1", "Cr2", "Cr5", "S"]
-  }
-}
-```
-
-#### 4. HEARTBEAT
-
-Mantém a ligação ativa e monitoriza a saúde dos processos.
-
-**Estrutura:**
-```json
-{
-  "messageId": "d6e8f0a2-4567-8901-23cd-ef1234567890",
-  "type": "HEARTBEAT",
-  "senderId": "Cr1",
-  "destinationId": "Coordinator",
-  "timestamp": 1729595235000,
-  "payload": {
-    "status": "RUNNING",
-    "uptime": 120.5,
-    "vehiclesInQueue": 12
-  }
-}
-```
-
-**Frequência:** A cada 5 segundos
-
-#### 5. LIGHT_CHANGE
-
-Notifica mudança de estado de semáforo (para logging/debugging).
-
-**Estrutura:**
-```json
-{
-  "messageId": "e7f9a1b3-5678-9012-34de-f12345678901",
-  "type": "LIGHT_CHANGE",
-  "senderId": "Cr1-North",
-  "destinationId": "Dashboard",
-  "timestamp": 1729595235100,
-  "payload": {
-    "lightId": "Cr1-North",
-    "previousState": "RED",
-    "newState": "GREEN",
-    "queueSize": 5
-  }
-}
-```
-
-### Tipos de Veículos
-
-```json
-{
-  "BIKE": {
-    "probability": 0.20,
-    "crossingTime": 1.5
-  },
-  "LIGHT": {
-    "probability": 0.60,
-    "crossingTime": 2.0
-  },
-  "HEAVY": {
-    "probability": 0.20,
-    "crossingTime": 4.0
-  }
-}
-```
-
-### Estados dos Semáforos
-
-```
-RED    → Veículos aguardam na fila
-GREEN  → Veículos podem atravessar
-```
-
-### Exemplo de Comunicação Completa
-
-```
-Tempo    Processo    Ação                                    Mensagem
-------   ---------   -------------------------------------   ------------------
-15.7s    Gerador     Gera veículo V123                      -
-15.7s    Gerador →   Injeta V123 em Cr1                     VEHICLE_TRANSFER
-18.2s    Cr1         V123 inicia travessia                  -
-20.2s    Cr1         V123 completa travessia                -
-20.2s    Cr1 → Cr2   Transfere V123 para Cr2                VEHICLE_TRANSFER
-23.5s    Cr2         V123 inicia travessia                  -
-25.5s    Cr2         V123 completa travessia                -
-25.5s    Cr2 → Cr5   Transfere V123 para Cr5                VEHICLE_TRANSFER
-28.0s    Cr5         V123 inicia travessia                  -
-30.0s    Cr5         V123 completa travessia                -
-30.0s    Cr5 → Exit  V123 sai do sistema                    VEHICLE_EXIT
-30.0s    Exit → Dash Estatísticas de V123                   STATS_UPDATE
-```
-
----
-
-## Estrutura do Projeto
-
-```
-Trabalho-Pratico-SD/
-├── README.md                          # Este ficheiro
-├── TODO.md                            # Plano de desenvolvimento
-├── main/
-│   ├── pom.xml                        # Configuração do Maven
-│   ├── docs/
-│   │   ├── README.md                  # Índice da documentação
-│   │   ├── SERIALIZATION_SPECIFICATION.md
-│   │   ├── SERIALIZATION_DECISION.md
-│   │   ├── SERIALIZATION_SUMMARY.md
-│   │   └── SERIALIZATION_ARCHITECTURE.md
-│   ├── src/
-│   │   ├── main/java/sd/
-│   │   │   ├── Entry.java             # Ponto de entrada
-│   │   │   ├── config/
-│   │   │   │   └── SimulationConfig.java
-│   │   │   ├── engine/
-│   │   │   │   └── SimulationEngine.java
-│   │   │   ├── model/
-│   │   │   │   ├── Event.java
-│   │   │   │   ├── EventType.java
-│   │   │   │   ├── Intersection.java
-│   │   │   │   ├── Message.java          # Estrutura de mensagens
-│   │   │   │   ├── MessageType.java      # Tipos de mensagens
-│   │   │   │   ├── TrafficLight.java
-│   │   │   │   ├── Vehicle.java
-│   │   │   │   └── VehicleType.java
-│   │   │   ├── serialization/            # Sistema de serialização
-│   │   │   │   ├── MessageSerializer.java
-│   │   │   │   ├── SerializationException.java
-│   │   │   │   ├── JsonMessageSerializer.java
-│   │   │   │   ├── SerializerFactory.java
-│   │   │   │   ├── SerializationExample.java
-│   │   │   │   └── README.md
-│   │   │   └── util/
-│   │   │       ├── RandomGenerator.java
-│   │   │       ├── StatisticsCollector.java
-│   │   │       └── VehicleGenerator.java
-│   │   └── test/java/
-│   │       ├── SimulationTest.java
-│   │       └── sd/serialization/
-│   │           └── SerializationTest.java
-│   └── target/                        # Ficheiros compilados
-└── .vscode/                           # Configuração do VS Code
-```
-
----
-
-## Instalação e Execução
-
-### Pré-requisitos
-
-- **Java 17** ou superior
-- **Maven 3.8+**
-- **Git**
-
-### Instalação
-
-```bash
-# Clonar o repositório
-git clone https://github.com/davidalves04/Trabalho-Pratico-SD.git
-cd Trabalho-Pratico-SD/main
-
-# Compilar o projeto
-mvn clean compile
-
-# Executar os testes
-mvn test
-```
-
-### Execução
-
-#### Simulação Básica (Single Process)
-
-```bash
-mvn exec:java -Dexec.mainClass="sd.Entry"
-```
-
-#### Exemplo de Serialização
-
-```bash
-mvn exec:java -Dexec.mainClass="sd.serialization.SerializationExample"
-```
-
-#### Configuração
-
-Editar `src/main/resources/simulation.properties`:
-
-```properties
-# Duração da simulação (segundos)
-simulation.duration=60.0
-
-# Modelo de chegada: FIXED ou POISSON
-arrival.model=POISSON
-
-# Taxa de chegada (veículos/segundo)
-arrival.rate=0.5
-
-# Intervalo de atualização de estatísticas (segundos)
-stats.update.interval=10.0
-
-# Distribuição de tipos de veículos
-vehicle.type.bike.probability=0.20
-vehicle.type.light.probability=0.60
-vehicle.type.heavy.probability=0.20
-
-# Tempos de travessia por tipo (segundos)
-vehicle.type.bike.crossing.time=1.5
-vehicle.type.light.crossing.time=2.0
-vehicle.type.heavy.crossing.time=4.0
-```
-
----
-
-## Documentação
-
-### Documentação de Serialização
-
-A documentação completa sobre o protocolo de serialização está disponível em:
-
-- **[Índice Completo](./main/docs/README.md)** - Navegação da documentação
-- **[Especificação](./main/docs/SERIALIZATION_SPECIFICATION.md)** - Design detalhado
-- **[Guia de Decisão](./main/docs/SERIALIZATION_DECISION.md)** - Porquê JSON?
-- **[Resumo](./main/docs/SERIALIZATION_SUMMARY.md)** - Estado de implementação
-- **[Arquitetura](./main/docs/SERIALIZATION_ARCHITECTURE.md)** - Diagramas visuais
-
-### Guias de Utilização
-
-- **[Serialization README](./main/src/main/java/sd/serialization/README.md)** - Como utilizar os serializers
-
-### Exemplos de Código
-
-```java
-// Criar serializer
-MessageSerializer serializer = SerializerFactory.createDefault();
-
-// Serializar mensagem
-Vehicle vehicle = new Vehicle("V123", VehicleType.LIGHT, 10.5, route);
-Message message = new Message(
-    MessageType.VEHICLE_TRANSFER,
-    "Cr1",
-    "Cr2",
-    vehicle
-);
-byte[] data = serializer.serialize(message);
-
-// Enviar via socket
-outputStream.write(data);
-
-// Receber e desserializar
-byte[] received = inputStream.readAllBytes();
-Message msg = serializer.deserialize(received, Message.class);
-Vehicle v = msg.getPayloadAs(Vehicle.class);
-```
-
----
-
-## Desenvolvimento
-
-### Estado do Projeto
-
-| Componente | Estado | Notas |
-|------------|--------|-------|
-| Modelo de Dados | Completo | Vehicle, Message, Event, etc. |
-| Simulação DES | Completo | Single-process funcional |
-| Serialização | Completo | JSON e Java implementados |
-| Testes | 14/14 | Suite de serialização |
-| Processos Distribuídos | Planeado | Próxima etapa |
-| Comunicação Sockets | Planeado | Em design |
-| Dashboard | Planeado | UI web |
-
-### Roteiro de Desenvolvimento
-
-#### Fase 1: Fundações (Concluído)
-- Modelação de classes
-- Simulação DES single-process
-- Design de protocolo de serialização
-- Implementação JSON/Java serialization
-- Testes unitários
-
-#### Fase 2: Distribuição (Em Curso)
-- Implementar comunicação via sockets
-- Separar cruzamentos em processos
-- Implementar threads de semáforos
-- Testar comunicação entre processos
-
-#### Fase 3: Dashboard e Monitorização
-- Dashboard server
-- UI web em tempo real
-- Visualização de estatísticas
-- Logs estruturados
-
-#### Fase 4: Optimização e Análise
-- Testes de carga
-- Análise de diferentes políticas
-- Recolha de métricas
-- Relatório final
-
-### Executar Testes
-
-```bash
-# Todos os testes
-mvn test
-
-# Apenas testes de serialização
-mvn test -Dtest=SerializationTest
-
-# Com relatório de cobertura
-mvn test jacoco:report
-```
-
-### Contribuir
-
-1. Fork o projeto
-2. Criar uma branch para a funcionalidade (`git checkout -b feature/MinhaFuncionalidade`)
-3. Commit das alterações (`git commit -m 'Adiciona MinhaFuncionalidade'`)
-4. Push para a branch (`git push origin feature/MinhaFuncionalidade`)
-5. Abrir um Pull Request
-
----
-
-## Métricas de Desempenho
-
-### Serialização
-
-| Formato | Tamanho | Latência | Throughput |
-|---------|---------|----------|------------|
-| JSON | 300 bytes | 40.79 μs | ~24k msgs/s |
-| Java | 657 bytes | 33.34 μs | ~30k msgs/s |
-
-**Conclusão**: JSON é 54% menor com overhead desprezível (7 μs)
-
-### Simulação
-
-- **Veículos gerados/s**: ~0.5-1.0 (configurável)
-- **Throughput**: ~0.2 veículos/s (saída)
-- **Tempo de execução**: 140ms para 60s de simulação
-- **Overhead**: < 0.25% do tempo simulado
-
----
-
-## Protocolo de Mensagens - Resumo
-
-### Formato Base
-
-```
-+------------------+
-| Message Header   |
-|------------------|
-| messageId        | UUID único
-| type             | Enum MessageType
-| senderId         | ID do processo remetente
-| destinationId    | ID do processo destino (null = broadcast)
-| timestamp        | Tempo de criação (ms)
-+------------------+
-| Payload          |
-|------------------|
-| Object           | Dados específicos do tipo de mensagem
-+------------------+
-```
-
-### Serialização
-
-- **Formato**: JSON (UTF-8)
-- **Biblioteca**: Gson 2.10.1
-- **Codificação**: UTF-8
-- **Compressão**: Opcional (gzip)
-
-### Transporte
-
-- **Protocolo**: TCP/IP
-- **Porta base**: 5000+ (configurável)
-- **Timeout**: 30s
-- **Keep-alive**: Heartbeat a cada 5s
-
----
-
-## Segurança
-
-### Considerações
-
-1. **Validação de Mensagens**
-   - Verificar tipos esperados
-   - Validar intervalos de valores
-   - Rejeitar mensagens malformadas
-
-2. **Autenticação** (Planeado)
-   - Autenticação baseada em token
-   - Whitelist de processos
-
-3. **Encriptação** (Opcional)
-   - TLS/SSL para produção
-   - Não necessário para ambiente de desenvolvimento local
-
----
-
-## Licença
-
-Este projeto é desenvolvido para fins académicos no âmbito da disciplina de Sistemas Distribuídos (SD) do Instituto Politécnico do Porto.
-
----
-
-## Equipa
-
-**Instituição**: Instituto Politécnico do Porto  
-**Curso**: Sistemas Distribuídos  
-**Ano Letivo**: 2025-2026 (1º Semestre)
-
----
-
-## Suporte
-
-Para questões ou problemas:
-
-1. Consultar a [documentação](./main/docs/README.md)
-2. Ver [exemplos de código](./main/src/main/java/sd/serialization/SerializationExample.java)
-3. Executar testes: `mvn test`
-4. Abrir issue no GitHub
-
----
-
-## Ligações Úteis
-
-- [Documentação do Projeto](./main/docs/README.md)
-- [Plano de Desenvolvimento](./TODO.md)
-- [Especificação de Serialização](./main/docs/SERIALIZATION_SPECIFICATION.md)
-- [Guia de Serialização](./main/src/main/java/sd/serialization/README.md)
-
----
-
-**Última actualização**: 23 de outubro de 2025  
-**Versão**: 1.0.0  
-**Estado**: Em Desenvolvimento Activo

STEP2_SUMMARY.md

@@ -1,134 +0,0 @@
-# 🏁 Single-Process Prototype — Implementation Summary
-
-**Status:** ✅ Complete
-**Date:** October 22, 2025
-**Branch:** `8-single-process-prototype`
-
----
-
-## Overview
-
-The single-process prototype implements a **discrete event simulation (DES)** of a 3×3 urban grid with five intersections, realistic vehicle behavior, and fully synchronized traffic lights. Everything runs under one process, laying the groundwork for the distributed architecture in Phase 3.
-
----
-
-## Core Architecture
-
-### **SimulationEngine**
-
-Drives the DES loop with a priority queue of timestamped events — vehicles, lights, crossings, and periodic stats updates. Handles five intersections (Cr1–Cr5) and six event types.
-
-**Main loop:**
-
-```
-while (events && time < duration):
-    event = nextEvent()
-    time = event.timestamp
-    handle(event)
-```
-
-### **VehicleGenerator**
-
-Spawns vehicles via:
-
-* **Poisson arrivals** (λ = 0.5 veh/s) or fixed intervals
-* **Probabilistic routes** from E1–E3
-* **Type distribution**: 20% BIKE, 60% LIGHT, 20% HEAVY
-
-### **StatisticsCollector**
-
-Tracks system-wide and per-type metrics: throughput, avg. wait, queue sizes, light cycles — updated every 10 s and at simulation end.
-
----
-
-## Model Highlights
-
-* **Vehicle** – type, route, timings, lifecycle.
-* **Intersection** – routing tables, traffic lights, queues.
-* **TrafficLight** – red/green cycles with FIFO queues.
-* **Event** – timestamped, comparable; 6 types for all DES actions.
-
----
-
-## Configuration (`simulation.properties`)
-
-```properties
-simulation.duration=60.0
-simulation.arrival.model=POISSON
-simulation.arrival.rate=0.5
-
-vehicle.bike.crossingTime=1.5
-vehicle.light.crossingTime=2.0
-vehicle.heavy.crossingTime=4.0
-
-statistics.update.interval=10.0
-```
-
-**Speed logic:**
-`t_bike = 0.5×t_car`, `t_heavy = 2×t_car`.
-
----
-
-## Topology
-
-```
-E1→Cr1→Cr4→Cr5→S
-E2→Cr2→Cr5→S
-E3→Cr3→S
-Bi-dir: Cr1↔Cr2, Cr2↔Cr3
-```
-
----
-
-## Results
-
-**Unit Tests:** 7/7 ✅
-**60-Second Simulation:**
-
-* Generated: 22 vehicles
-* Completed: 5 (22.7%)
-* Avg system time: 15.47 s
-* Throughput: 0.08 veh/s
-* All lights & intersections operational
-
-**Performance:**
-~0.03 s real-time run (≈2000× speed-up), < 50 MB RAM.
-
----
-
-## Code Structure
-
-```
-sd/
-├── engine/SimulationEngine.java
-├── model/{Vehicle,Intersection,TrafficLight,Event}.java
-├── util/{VehicleGenerator,StatisticsCollector}.java
-└── config/SimulationConfig.java
-```
-
----
-
-## Key Flow
-
-1. Initialize intersections, lights, first events.
-2. Process events chronologically.
-3. Vehicles follow routes → queue → cross → exit.
-4. Lights toggle, queues drain, stats update.
-5. Print summary and performance metrics.
-
----
-
-## Next Steps — Phase 3
-
-* Split intersections into independent **processes**.
-* Add **socket-based communication**.
-* Run **traffic lights as threads**.
-* Enable **distributed synchronization** and fault handling.
-
----
-
-## TL;DR
-
-Solid single-process DES ✅
-Everything’s working — traffic lights, routing, vehicles, stats.
-Ready to go distributed next.

TODO.md

@@ -1,198 +0,0 @@
-## ✅ SINGLE-PROCESS PROTOTYPE - COMPLETED
-
-### Phase 2 Status: DONE ✅
-
-All components for the single-process prototype have been successfully implemented and tested:
-
-- ✅ **SimulationEngine** - Priority queue-based discrete event simulation
-- ✅ **VehicleGenerator** - Poisson and Fixed arrival models
-- ✅ **StatisticsCollector** - Comprehensive metrics tracking
-- ✅ **Entry point** - Main simulation runner
-- ✅ **60s test simulation** - Successfully validated event processing and routing
-
-### Test Results:
-- All 7 unit tests passing
-- 60-second simulation completed successfully
-- Generated 22 vehicles with 5 completing their routes
-- Traffic light state changes working correctly
-- Vehicle routing through intersections validated
-
----
-
-## NEXT: Distributed Architecture Implementation
-
-### Compreender os Conceitos Fundamentais
-
-Primeiro, as tecnologias e paradigmas chave necessários para este projeto devem ser totalmente compreendidos.
-
-- **Processos vs. Threads:** O projeto especifica o uso de ambos.
-    
-    - **Processos (para Cruzamentos)** são programas independentes, cada um com o seu próprio espaço de memória. Em Java, cada cruzamento será provavelmente executado como uma aplicação Java separada (uma instância distinta da JVM).
-        
-    - **Threads (para Semáforos)** existem _dentro_ de um processo e partilham memória. Isto é adequado para os semáforos, pois eles precisam de ser coordenados e partilhar dados (como filas de veículos) dentro do mesmo cruzamento.
-        
-- **Comunicação Entre Processos (IPC - Inter-Process Communication):** Como os cruzamentos são processos separados, é necessário um método para que eles comuniquem. **Sockets** são o método especificado. Quando um veículo sai de um cruzamento (ex: `Cr1`) e vai para outro (ex: `Cr2`), o processo `Cr1` precisa de enviar uma mensagem contendo os dados do veículo para o processo `Cr2` através de uma conexão por socket.
-    
-- **Simulação de Eventos Discretos (DES - Discrete-Event Simulation):** Este é o paradigma de simulação que deve ser utilizado. Em vez de o tempo fluir continuamente, o relógio da simulação salta de um evento para o seguinte.
-    
-    - Um **evento** é um objeto que representa algo que acontece num ponto específico no tempo (ex: "Veículo A chega ao Cr2 no tempo 15.7s").
-        
-    - Uma **lista de eventos** central, frequentemente uma fila de prioridades, será necessária para armazenar eventos futuros, ordenados pelo seu timestamp. O ciclo principal da simulação retira o próximo evento da lista, processa-o e adiciona quaisquer novos eventos que resultem dele.
-        
-- **Processo de Poisson:** Para o modelo 'mais realista' de chegadas de veículos, é especificado um processo de Poisson. A principal conclusão é que o tempo _entre_ chegadas consecutivas de veículos segue uma **distribuição exponencial**. Em Java, este intervalo pode ser gerado usando `Math.log(1 - Math.random()) / -lambda`, onde `lambda` (λi​) é a taxa de chegada especificada.
-    
-
----
-
-### Uma Sugestão de Arquitetura de Alto Nível
-
-Abaixo, é apresentada uma possível estrutura para a aplicação distribuída. Pode ser vista como um conjunto de programas independentes que comunicam através de uma rede.
-
-1. **Processo Coordenador/Gerador (1 Processo):**
-    
-    - **Propósito:** Iniciar a simulação, gerar veículos e gerir o relógio global da simulação ou os critérios de paragem.
-        
-    - **Responsabilidades:**
-        
-        - Lê a configuração da simulação (ex: carga de tráfego λi​, tempos dos semáforos).
-            
-        - Gera veículos de acordo com o modelo selecionado (intervalo fixo ou processo de Poisson).
-            
-        - Atribui a cada novo veículo um percurso com base na distribuição uniforme especificada.
-            
-        - Injeta o veículo no sistema enviando uma mensagem para o primeiro processo de cruzamento no seu percurso (ex: de um ponto de entrada E1 para Cr1).
-            
-2. **Processos de Cruzamento (5 Processos):**
-    
-    - **Propósito:** Simular cada cruzamento (`Cr1` a `Cr5`) como um processo distinto.
-        
-    - **Responsabilidades:**
-        
-        - Escuta por veículos a chegar de outros processos.
-            
-        - Gere as filas de veículos para os seus semáforos.
-            
-        - Executa múltiplas **threads de Semáforo** internamente.
-            
-        - Coordena estas threads para garantir que apenas uma direção de tráfego está aberta a cada momento.
-            
-        - Quando um veículo atravessa, é encaminhado para o processo seguinte no seu percurso.
-            
-        - Envia periodicamente as suas estatísticas (ex: comprimentos atuais das filas) para o Servidor do Dashboard.
-            
-3. **Processo de Nó de Saída (1 Processo):**
-    
-    - **Propósito:** Representar o ponto de saída `S` e atuar como um coletor de dados para estatísticas globais.
-        
-    - **Responsabilidades:**
-        
-        - Recebe veículos que completaram o seu percurso.
-            
-        - Calcula métricas globais como o tempo total de viagem (tempo de permanência) para cada veículo.
-            
-        - Agrega e calcula as estatísticas finais (ex: tempo de viagem mínimo, máximo e médio por tipo de veículo).
-            
-        - Envia estas estatísticas globais para o Servidor do Dashboard.
-            
-4. **Processo do Servidor do Dashboard (1 Processo):**
-    
-    - **Propósito:** Agregar e exibir todos os dados da simulação em tempo real.
-        
-    - **Responsabilidades:**
-        
-        - Abre um socket de servidor e escuta por dados a chegar de todos os processos de Cruzamento e de Saída.
-            
-        - Armazena e atualiza as estatísticas à medida que chegam.
-            
-        - Apresenta os dados numa interface de utilizador, que deve exibir métricas e ser atualizada durante a simulação.
-            
-
----
-
-### Plano
-
-Nem tudo deve ser construído de uma só vez. Os seguintes passos incrementais são recomendados.
-
-#### **Passo 1: Modelação e Classes Principais (Não-distribuído)**
-
-Antes de escrever qualquer lógica complexa, as estruturas de dados devem ser definidas. Devem ser criados Plain Old Java Objects (POJOs) para:
-
-- `Veiculo`: Com atributos como um identificador único, tipo, tempo de entrada e o percurso realizado. Deve ser tornado `Serializable` para que possa ser enviado através de sockets.
-    
-- `Evento`: Com atributos como um timestamp e o tipo de evento (ex: `VEHICLE_ARRIVAL`), bem como dados associados.
-    
-- `Semaforo`: Para conter o seu estado (`VERDE`/`VERMELHO`) e a fila de veículos.
-    
-- `Cruzamento`: Para conter os seus semáforos e a lógica operacional.
-    
-
-#### **Passo 2: Construir um Protótipo de Processo Único**
-
-Este é um passo crucial. Sockets e processos devem ser deixados de lado por agora para construir toda a simulação numa única aplicação Java.
-
-- Deve ser criado um ciclo de simulação central baseado numa fila de prioridades para objetos `Evento`.
-    
-- Todos os objetos `Cruzamento` e `Semaforo` devem ser instanciados.
-    
-- A lógica principal deve ser tornada funcional: veículos a moverem-se entre filas, semáforos a mudar de estado e estatísticas básicas a serem recolhidas.
-    
-- **Objetivo:** Uma simulação totalmente funcional e não-distribuída. Isto torna a depuração significativamente mais fácil.
-    
-
-#### **Passo 3: Distribuir os Cruzamentos**
-
-O protótipo pode agora ser convertido num sistema distribuído.
-
-- A classe `Cruzamento` deve ser tornada executável como uma aplicação Java autónoma (com um método `main`). Serão lançadas cinco instâncias, uma para cada cruzamento.
-    
-- Devem ser configurados sockets TCP para comunicação. Cada processo de cruzamento precisa de saber o endereço/porta dos vizinhos para os quais pode enviar veículos.
-    
-- Um **protocolo de comunicação** claro deve ser definido. Por exemplo, quando `Cr1` envia um veículo para `Cr2`, o objeto `Veiculo` é serializado e escrito no socket conectado a `Cr2`. O processo `Cr2` terá uma thread dedicada para escutar estas conexões de entrada.
-    
-
-#### **Passo 4: Implementar as Threads dos Semáforos**
-
-Dentro de cada processo `Cruzamento`, os semáforos devem ser implementados como threads.
-
-- O principal desafio aqui é a **sincronização**. As threads dos semáforos num único cruzamento partilham as filas de veículos.
-    
-- As ferramentas de concorrência do Java (como `synchronized`, `ReentrantLock`, `Semaphore`) devem ser usadas para garantir que apenas um semáforo pode estar verde para um percurso conflituante e que o acesso às filas partilhadas é seguro (thread-safe).
-    
-
-#### **Passo 5: Implementar o Dashboard**
-
-- O processo `DashboardServer` deve ser criado. Ele irá escutar numa porta específica por estatísticas a chegar.
-    
-- Nos processos `Cruzamento` e `Saida`, deve ser adicionado um mecanismo para enviar periodicamente um resumo das suas estatísticas atuais para o Servidor do Dashboard.
-    
-- A UI deve ser construída para exibir estes dados em tempo real.
-    
-
-#### **Passo 6: Testes e Análise**
-
-Assim que o sistema completo estiver a funcionar, as experiências exigidas pela descrição do projeto podem ser realizadas.
-
-- A simulação deve ser executada com diferentes taxas de chegada de veículos para simular cargas baixas, médias e altas.
-    
-- Diferentes políticas de temporização dos semáforos devem ser testadas para medir o seu impacto no congestionamento.
-    
-- Diferentes algoritmos de seleção de percurso e o seu impacto no desempenho do sistema devem ser avaliados.
-    
-- Para cada cenário, a simulação deve ser executada várias vezes para recolher estatísticas fiáveis (médias, desvios padrão, intervalos de confiança), conforme solicitado.
-    
-
-#### **Passo 7: Escrever o Relatório**
-
-À medida que cada passo é concluído, deve ser documentado. Isto tornará a escrita do relatório final muito mais fácil. Todos os pontos mencionados nas secções "Entrega" e "Critérios de Avaliação" devem ser abordados.
-
----
-
-### OBS:
-
-- **Começar de Forma Simples:** O protótipo de processo único (Passo 2) evitará grandes dificuldades mais tarde.
-    
-- **Protocolo de Comunicação:** O protocolo de mensagens deve ser definido o mais cedo possível. A informação exata que um processo envia para outro deve ser clara//simples//consistente.
-    
-- **Debugging:** Debugging de sistemas distribuídos podem ser difíceis. Uma framework de logging (como Log4j 2 ou SLF4J) pode ser usada para registar eventos//alterações de estado nos diferentes processos.
-    
-- **Configuração:** Valores como endereços IP, números de porta ou parâmetros da simulação não devem ser "hardcoded". Um ficheiro de configuração (ex: um ficheiro `.properties` ou `.json`) torna a aplicação mais fácil de executar e testar.

main/analysis/HIGH_LOAD_20251207-001113.csv

@@ -0,0 +1,6 @@
+Execução,VeículosGerados,VeículosCompletados,TaxaConclusão,TempoMédioSistema,TempoMédioEspera,TempoMínimoSistema,TempoMáximoSistema
+1,1784,877,49.16,64.58,61.43,32.29,129.16
+2,1782,363,20.37,53.77,51.01,26.88,107.53
+3,1786,883,49.44,53.09,50.08,26.54,106.17
+4,1845,179,9.70,63.92,60.27,31.96,127.84
+5,1872,953,50.91,65.41,62.16,32.70,130.81

main/analysis/HIGH_LOAD_20251207-001113.txt

@@ -0,0 +1,215 @@
+================================================================================
+ANÁLISE ESTATÍSTICA MULTI-EXECUÇÃO
+================================================================================
+Configuração: simulation-high.properties
+Número de Execuções: 5
+Data da Análise: 2025-12-07 00:11:13
+
+--------------------------------------------------------------------------------
+MÉTRICAS GLOBAIS
+--------------------------------------------------------------------------------
+
+Veículos Gerados:
+    Média:      1813.80    Desvio Padrão:      41.93
+    Mediana:    1786.00    IC 95%: [1754.13, 1873.47]
+    Mín:        1782.00    Máx:             1872.00
+
+Veículos Completados:
+    Média:       651.00    Desvio Padrão:     354.20
+    Mediana:     877.00    IC 95%: [146.96, 1155.04]
+    Mín:         179.00    Máx:              953.00
+
+Taxa de Conclusão (%):
+    Média:        35.92    Desvio Padrão:      19.44
+    Mediana:      49.16    IC 95%: [8.25, 63.58]
+    Mín:           9.70    Máx:               50.91
+
+Tempo Médio no Sistema (segundos):
+    Média:        60.15    Desvio Padrão:       6.17
+    Mediana:      63.92    IC 95%: [51.38, 68.93]
+    Mín:          53.09    Máx:               65.41
+
+Tempo Médio de Espera (segundos):
+    Média:        56.99    Desvio Padrão:       5.93
+    Mediana:      60.27    IC 95%: [48.55, 65.43]
+    Mín:          50.08    Máx:               62.16
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR TIPO DE VEÍCULO
+--------------------------------------------------------------------------------
+
+--- BIKE ---
+  Contagem de Veículos:
+    Média:       135.40    Desvio Padrão:      77.66
+    Mediana:     167.00    IC 95%: [24.89, 245.91]
+    Mín:          37.00    Máx:              211.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        55.15    Desvio Padrão:      12.01
+    Mediana:      54.23    IC 95%: [38.07, 72.24]
+    Mín:          43.41    Máx:               74.99
+
+
+--- LIGHT ---
+  Contagem de Veículos:
+    Média:       395.00    Desvio Padrão:     207.62
+    Mediana:     540.00    IC 95%: [99.55, 690.45]
+    Mín:         107.00    Máx:              548.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        59.79    Desvio Padrão:       7.28
+    Mediana:      61.58    IC 95%: [49.43, 70.15]
+    Mín:          50.81    Máx:               69.26
+
+
+--- HEAVY ---
+  Contagem de Veículos:
+    Média:       120.60    Desvio Padrão:      72.95
+    Mediana:     142.00    IC 95%: [16.79, 224.41]
+    Mín:          35.00    Máx:              202.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        49.20    Desvio Padrão:       8.62
+    Mediana:      50.31    IC 95%: [36.94, 61.46]
+    Mín:          35.51    Máx:               58.20
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR INTERSEÇÃO
+--------------------------------------------------------------------------------
+
+--- Cr1 ---
+  Tamanho Máximo da Fila:
+    Média:         3.20    Desvio Padrão:       5.54
+    Mediana:       1.00    IC 95%: [-4.68, 11.08]
+    Mín:           0.00    Máx:               13.00
+
+  Tamanho Médio da Fila:
+    Média:         3.20    Desvio Padrão:       5.54
+    Mediana:       1.00    IC 95%: [-4.68, 11.08]
+    Mín:           0.00    Máx:               13.00
+
+  Veículos Processados:
+    Média:       378.40    Desvio Padrão:     252.94
+    Mediana:     512.00    IC 95%: [18.46, 738.34]
+    Mín:          58.00    Máx:              600.00
+
+
+--- Cr2 ---
+  Tamanho Máximo da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Tamanho Médio da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Veículos Processados:
+    Média:       390.40    Desvio Padrão:     223.14
+    Mediana:     409.00    IC 95%: [72.87, 707.93]
+    Mín:          59.00    Máx:              599.00
+
+
+--- Cr3 ---
+  Tamanho Máximo da Fila:
+    Média:         6.20    Desvio Padrão:       8.67
+    Mediana:       0.00    IC 95%: [-6.14, 18.54]
+    Mín:           0.00    Máx:               18.00
+
+  Tamanho Médio da Fila:
+    Média:         6.20    Desvio Padrão:       8.67
+    Mediana:       0.00    IC 95%: [-6.14, 18.54]
+    Mín:           0.00    Máx:               18.00
+
+  Veículos Processados:
+    Média:       339.00    Desvio Padrão:     239.34
+    Mediana:     416.00    IC 95%: [-1.59, 679.59]
+    Mín:          57.00    Máx:              622.00
+
+
+--- Cr4 ---
+  Tamanho Máximo da Fila:
+    Média:         0.60    Desvio Padrão:       0.89
+    Mediana:       0.00    IC 95%: [-0.67, 1.87]
+    Mín:           0.00    Máx:                2.00
+
+  Tamanho Médio da Fila:
+    Média:         0.60    Desvio Padrão:       0.89
+    Mediana:       0.00    IC 95%: [-0.67, 1.87]
+    Mín:           0.00    Máx:                2.00
+
+  Veículos Processados:
+    Média:       123.40    Desvio Padrão:     116.13
+    Mediana:     109.00    IC 95%: [-41.85, 288.65]
+    Mín:          21.00    Máx:              316.00
+
+
+--- Cr5 ---
+  Tamanho Máximo da Fila:
+    Média:         2.40    Desvio Padrão:       1.14
+    Mediana:       2.00    IC 95%: [0.78, 4.02]
+    Mín:           1.00    Máx:                4.00
+
+  Tamanho Médio da Fila:
+    Média:         2.40    Desvio Padrão:       1.14
+    Mediana:       2.00    IC 95%: [0.78, 4.02]
+    Mín:           1.00    Máx:                4.00
+
+  Veículos Processados:
+    Média:       200.80    Desvio Padrão:     114.19
+    Mediana:     261.00    IC 95%: [38.31, 363.29]
+    Mín:          70.00    Máx:              305.00
+
+
+--- ExitNode ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:       651.00    Desvio Padrão:     354.20
+    Mediana:     877.00    IC 95%: [146.96, 1155.04]
+    Mín:         179.00    Máx:              953.00
+
+
+--------------------------------------------------------------------------------
+RESUMOS INDIVIDUAIS DAS EXECUÇÕES
+--------------------------------------------------------------------------------
+
+Execução #1 [simulation-high.properties]:
+  Gerados: 1784, Completados: 877 (49.2%)
+  Tempo Médio no Sistema: 64.58s
+  Tempo Médio de Espera: 61.43s
+
+Execução #2 [simulation-high.properties]:
+  Gerados: 1782, Completados: 363 (20.4%)
+  Tempo Médio no Sistema: 53.77s
+  Tempo Médio de Espera: 51.01s
+
+Execução #3 [simulation-high.properties]:
+  Gerados: 1786, Completados: 883 (49.4%)
+  Tempo Médio no Sistema: 53.09s
+  Tempo Médio de Espera: 50.08s
+
+Execução #4 [simulation-high.properties]:
+  Gerados: 1845, Completados: 179 (9.7%)
+  Tempo Médio no Sistema: 63.92s
+  Tempo Médio de Espera: 60.27s
+
+Execução #5 [simulation-high.properties]:
+  Gerados: 1872, Completados: 953 (50.9%)
+  Tempo Médio no Sistema: 65.41s
+  Tempo Médio de Espera: 62.16s
+
+================================================================================
+FIM DO RELATÓRIO
+================================================================================

main/analysis/LOW_LOAD_20251207-000957.csv

@@ -0,0 +1,6 @@
+Execução,VeículosGerados,VeículosCompletados,TaxaConclusão,TempoMédioSistema,TempoMédioEspera,TempoMínimoSistema,TempoMáximoSistema
+1,371,187,50.40,42.28,38.65,21.14,84.57
+2,361,263,72.85,29.15,25.29,14.57,58.30
+3,368,197,53.53,38.02,33.95,19.01,76.04
+4,350,239,68.29,32.38,28.36,16.19,64.75
+5,373,212,56.84,23.36,19.96,11.68,46.73

main/analysis/LOW_LOAD_20251207-000957.txt

@@ -0,0 +1,209 @@
+================================================================================
+ANÁLISE ESTATÍSTICA MULTI-EXECUÇÃO
+================================================================================
+Configuração: simulation-low.properties
+Número de Execuções: 5
+Data da Análise: 2025-12-07 00:09:57
+
+--------------------------------------------------------------------------------
+MÉTRICAS GLOBAIS
+--------------------------------------------------------------------------------
+
+Veículos Gerados:
+    Média:       364.60    Desvio Padrão:       9.34
+    Mediana:     368.00    IC 95%: [351.30, 377.90]
+    Mín:         350.00    Máx:              373.00
+
+Veículos Completados:
+    Média:       219.60    Desvio Padrão:      31.19
+    Mediana:     212.00    IC 95%: [175.22, 263.98]
+    Mín:         187.00    Máx:              263.00
+
+Taxa de Conclusão (%):
+    Média:        60.38    Desvio Padrão:       9.71
+    Mediana:      56.84    IC 95%: [46.57, 74.20]
+    Mín:          50.40    Máx:               72.85
+
+Tempo Médio no Sistema (segundos):
+    Média:        33.04    Desvio Padrão:       7.41
+    Mediana:      32.38    IC 95%: [22.50, 43.58]
+    Mín:          23.36    Máx:               42.28
+
+Tempo Médio de Espera (segundos):
+    Média:        29.24    Desvio Padrão:       7.30
+    Mediana:      28.36    IC 95%: [18.85, 39.63]
+    Mín:          19.96    Máx:               38.65
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR TIPO DE VEÍCULO
+--------------------------------------------------------------------------------
+
+--- BIKE ---
+  Contagem de Veículos:
+    Média:        41.00    Desvio Padrão:       6.96
+    Mediana:      43.00    IC 95%: [31.09, 50.91]
+    Mín:          33.00    Máx:               50.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        25.91    Desvio Padrão:       3.91
+    Mediana:      26.98    IC 95%: [20.35, 31.47]
+    Mín:          19.60    Máx:               30.06
+
+
+--- LIGHT ---
+  Contagem de Veículos:
+    Média:       134.00    Desvio Padrão:      24.07
+    Mediana:     130.00    IC 95%: [99.74, 168.26]
+    Mín:         104.00    Máx:              167.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        29.34    Desvio Padrão:       6.83
+    Mediana:      27.89    IC 95%: [19.62, 39.06]
+    Mín:          20.73    Máx:               36.42
+
+
+--- HEAVY ---
+  Contagem de Veículos:
+    Média:        44.60    Desvio Padrão:       3.44
+    Mediana:      46.00    IC 95%: [39.71, 49.49]
+    Mín:          40.00    Máx:               48.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        32.11    Desvio Padrão:      15.90
+    Mediana:      30.74    IC 95%: [9.48, 54.74]
+    Mín:          18.09    Máx:               58.73
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR INTERSEÇÃO
+--------------------------------------------------------------------------------
+
+--- Cr1 ---
+  Tamanho Máximo da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Tamanho Médio da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Veículos Processados:
+    Média:        63.80    Desvio Padrão:      17.25
+    Mediana:      57.00    IC 95%: [39.25, 88.35]
+    Mín:          48.00    Máx:               91.00
+
+
+--- Cr2 ---
+  Tamanho Máximo da Fila:
+    Média:         0.80    Desvio Padrão:       1.79
+    Mediana:       0.00    IC 95%: [-1.75, 3.35]
+    Mín:           0.00    Máx:                4.00
+
+  Tamanho Médio da Fila:
+    Média:         0.80    Desvio Padrão:       1.79
+    Mediana:       0.00    IC 95%: [-1.75, 3.35]
+    Mín:           0.00    Máx:                4.00
+
+  Veículos Processados:
+    Média:        56.20    Desvio Padrão:      18.51
+    Mediana:      50.00    IC 95%: [29.86, 82.54]
+    Mín:          35.00    Máx:               78.00
+
+
+--- Cr3 ---
+  Tamanho Máximo da Fila:
+    Média:         1.00    Desvio Padrão:       1.41
+    Mediana:       0.00    IC 95%: [-1.01, 3.01]
+    Mín:           0.00    Máx:                3.00
+
+  Tamanho Médio da Fila:
+    Média:         1.00    Desvio Padrão:       1.41
+    Mediana:       0.00    IC 95%: [-1.01, 3.01]
+    Mín:           0.00    Máx:                3.00
+
+  Veículos Processados:
+    Média:        63.20    Desvio Padrão:      23.97
+    Mediana:      56.00    IC 95%: [29.09, 97.31]
+    Mín:          41.00    Máx:              104.00
+
+
+--- Cr4 ---
+  Tamanho Máximo da Fila:
+    Média:         1.80    Desvio Padrão:       2.49
+    Mediana:       0.00    IC 95%: [-1.74, 5.34]
+    Mín:           0.00    Máx:                5.00
+
+  Tamanho Médio da Fila:
+    Média:         1.80    Desvio Padrão:       2.49
+    Mediana:       0.00    IC 95%: [-1.74, 5.34]
+    Mín:           0.00    Máx:                5.00
+
+  Veículos Processados:
+    Média:        51.00    Desvio Padrão:      16.05
+    Mediana:      53.00    IC 95%: [28.16, 73.84]
+    Mín:          31.00    Máx:               70.00
+
+
+--- Cr5 ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:        86.60    Desvio Padrão:      34.20
+    Mediana:      65.00    IC 95%: [37.94, 135.26]
+    Mín:          62.00    Máx:              139.00
+
+
+--- ExitNode ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:       219.60    Desvio Padrão:      31.19
+    Mediana:     212.00    IC 95%: [175.22, 263.98]
+    Mín:         187.00    Máx:              263.00
+
+
+--------------------------------------------------------------------------------
+RESUMOS INDIVIDUAIS DAS EXECUÇÕES
+--------------------------------------------------------------------------------
+
+Execução #1 [simulation-low.properties]:
+  Gerados: 371, Completados: 187 (50.4%)
+  Tempo Médio no Sistema: 42.28s
+  Tempo Médio de Espera: 38.65s
+
+Execução #2 [simulation-low.properties]:
+  Gerados: 361, Completados: 263 (72.9%)
+  Tempo Médio no Sistema: 29.15s
+  Tempo Médio de Espera: 25.29s
+
+Execução #3 [simulation-low.properties]:
+  Gerados: 368, Completados: 197 (53.5%)
+  Tempo Médio no Sistema: 38.02s
+  Tempo Médio de Espera: 33.95s
+
+Execução #4 [simulation-low.properties]:
+  Gerados: 350, Completados: 239 (68.3%)
+  Tempo Médio no Sistema: 32.38s
+  Tempo Médio de Espera: 28.36s
+
+Execução #5 [simulation-low.properties]:
+  Gerados: 373, Completados: 212 (56.8%)
+  Tempo Médio no Sistema: 23.36s
+  Tempo Médio de Espera: 19.96s
+
+================================================================================
+FIM DO RELATÓRIO
+================================================================================

main/analysis/MEDIUM_LOAD_20251207-001034.csv

@@ -0,0 +1,6 @@
+Execução,VeículosGerados,VeículosCompletados,TaxaConclusão,TempoMédioSistema,TempoMédioEspera,TempoMínimoSistema,TempoMáximoSistema
+1,950,416,43.79,49.34,45.70,24.67,98.68
+2,886,480,54.18,35.08,31.69,17.54,70.16
+3,954,535,56.08,43.76,40.30,21.88,87.51
+4,948,354,37.34,41.68,37.96,20.84,83.37
+5,898,312,34.74,52.56,49.26,26.28,105.13

main/analysis/MEDIUM_LOAD_20251207-001034.txt

@@ -0,0 +1,203 @@
+================================================================================
+ANÁLISE ESTATÍSTICA MULTI-EXECUÇÃO
+================================================================================
+Configuração: simulation-medium.properties
+Número de Execuções: 5
+Data da Análise: 2025-12-07 00:10:34
+
+--------------------------------------------------------------------------------
+MÉTRICAS GLOBAIS
+--------------------------------------------------------------------------------
+
+Veículos Gerados:
+    Média:       927.20    Desvio Padrão:      32.48
+    Mediana:     948.00    IC 95%: [880.97, 973.43]
+    Mín:         886.00    Máx:              954.00
+
+Veículos Completados:
+    Média:       419.40    Desvio Padrão:      90.64
+    Mediana:     416.00    IC 95%: [290.42, 548.38]
+    Mín:         312.00    Máx:              535.00
+
+Taxa de Conclusão (%):
+    Média:        45.23    Desvio Padrão:       9.64
+    Mediana:      43.79    IC 95%: [31.50, 58.95]
+    Mín:          34.74    Máx:               56.08
+
+Tempo Médio no Sistema (segundos):
+    Média:        44.48    Desvio Padrão:       6.81
+    Mediana:      43.76    IC 95%: [34.79, 54.18]
+    Mín:          35.08    Máx:               52.56
+
+Tempo Médio de Espera (segundos):
+    Média:        40.98    Desvio Padrão:       6.83
+    Mediana:      40.30    IC 95%: [31.26, 50.71]
+    Mín:          31.69    Máx:               49.26
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR TIPO DE VEÍCULO
+--------------------------------------------------------------------------------
+
+--- BIKE ---
+  Contagem de Veículos:
+    Média:        75.80    Desvio Padrão:      15.96
+    Mediana:      71.00    IC 95%: [53.09, 98.51]
+    Mín:          56.00    Máx:               95.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        42.34    Desvio Padrão:      10.81
+    Mediana:      39.70    IC 95%: [26.96, 57.72]
+    Mín:          31.96    Máx:               55.19
+
+
+--- LIGHT ---
+  Contagem de Veículos:
+    Média:       263.20    Desvio Padrão:      58.29
+    Mediana:     265.00    IC 95%: [180.25, 346.15]
+    Mín:         204.00    Máx:              344.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        39.13    Desvio Padrão:       6.35
+    Mediana:      38.08    IC 95%: [30.09, 48.17]
+    Mín:          30.47    Máx:               47.99
+
+
+--- HEAVY ---
+  Contagem de Veículos:
+    Média:        80.40    Desvio Padrão:      19.11
+    Mediana:      80.00    IC 95%: [53.20, 107.60]
+    Mín:          52.00    Máx:              102.00
+
+  Tempo Médio no Sistema (segundos): Sem dados
+
+  Tempo Médio de Espera (segundos):
+    Média:        48.02    Desvio Padrão:      30.99
+    Mediana:      34.44    IC 95%: [3.92, 92.11]
+    Mín:          32.46    Máx:              103.40
+
+
+--------------------------------------------------------------------------------
+ANÁLISE POR INTERSEÇÃO
+--------------------------------------------------------------------------------
+
+--- Cr1 ---
+  Tamanho Máximo da Fila:
+    Média:         5.60    Desvio Padrão:      11.44
+    Mediana:       0.00    IC 95%: [-10.67, 21.87]
+    Mín:           0.00    Máx:               26.00
+
+  Tamanho Médio da Fila:
+    Média:         5.60    Desvio Padrão:      11.44
+    Mediana:       0.00    IC 95%: [-10.67, 21.87]
+    Mín:           0.00    Máx:               26.00
+
+  Veículos Processados:
+    Média:       156.00    Desvio Padrão:     122.81
+    Mediana:      98.00    IC 95%: [-18.76, 330.76]
+    Mín:          35.00    Máx:              306.00
+
+
+--- Cr2 ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:       172.00    Desvio Padrão:     121.88
+    Mediana:     116.00    IC 95%: [-1.44, 345.44]
+    Mín:          66.00    Máx:              322.00
+
+
+--- Cr3 ---
+  Tamanho Máximo da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Tamanho Médio da Fila:
+    Média:         0.60    Desvio Padrão:       1.34
+    Mediana:       0.00    IC 95%: [-1.31, 2.51]
+    Mín:           0.00    Máx:                3.00
+
+  Veículos Processados:
+    Média:       168.40    Desvio Padrão:     133.38
+    Mediana:     121.00    IC 95%: [-21.40, 358.20]
+    Mín:          48.00    Máx:              326.00
+
+
+--- Cr4 ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:        71.80    Desvio Padrão:      20.39
+    Mediana:      77.00    IC 95%: [42.79, 100.81]
+    Mín:          38.00    Máx:               92.00
+
+
+--- Cr5 ---
+  Tamanho Máximo da Fila:
+    Média:         3.60    Desvio Padrão:       3.85
+    Mediana:       2.00    IC 95%: [-1.87, 9.07]
+    Mín:           0.00    Máx:               10.00
+
+  Tamanho Médio da Fila:
+    Média:         3.60    Desvio Padrão:       3.85
+    Mediana:       2.00    IC 95%: [-1.87, 9.07]
+    Mín:           0.00    Máx:               10.00
+
+  Veículos Processados:
+    Média:       150.60    Desvio Padrão:      43.37
+    Mediana:     126.00    IC 95%: [88.88, 212.32]
+    Mín:         116.00    Máx:              209.00
+
+
+--- ExitNode ---
+  Tamanho Máximo da Fila: Sem dados
+
+  Tamanho Médio da Fila: Sem dados
+
+  Veículos Processados:
+    Média:       419.40    Desvio Padrão:      90.64
+    Mediana:     416.00    IC 95%: [290.42, 548.38]
+    Mín:         312.00    Máx:              535.00
+
+
+--------------------------------------------------------------------------------
+RESUMOS INDIVIDUAIS DAS EXECUÇÕES
+--------------------------------------------------------------------------------
+
+Execução #1 [simulation-medium.properties]:
+  Gerados: 950, Completados: 416 (43.8%)
+  Tempo Médio no Sistema: 49.34s
+  Tempo Médio de Espera: 45.70s
+
+Execução #2 [simulation-medium.properties]:
+  Gerados: 886, Completados: 480 (54.2%)
+  Tempo Médio no Sistema: 35.08s
+  Tempo Médio de Espera: 31.69s
+
+Execução #3 [simulation-medium.properties]:
+  Gerados: 954, Completados: 535 (56.1%)
+  Tempo Médio no Sistema: 43.76s
+  Tempo Médio de Espera: 40.30s
+
+Execução #4 [simulation-medium.properties]:
+  Gerados: 948, Completados: 354 (37.3%)
+  Tempo Médio no Sistema: 41.68s
+  Tempo Médio de Espera: 37.96s
+
+Execução #5 [simulation-medium.properties]:
+  Gerados: 898, Completados: 312 (34.7%)
+  Tempo Médio no Sistema: 52.56s
+  Tempo Médio de Espera: 49.26s
+
+================================================================================
+FIM DO RELATÓRIO
+================================================================================

main/graphing.py

@@ -0,0 +1,169 @@
+import pandas as pd
+import matplotlib.pyplot as plt
+import glob
+import os
+
+# Find CSV files using glob
+def load_latest_csv(pattern):
+    """Load the most recent CSV file matching the pattern"""
+    files = glob.glob(pattern)
+    if not files:
+        print(f"Warning: No files found matching '{pattern}'")
+        return None
+    # Sort by modification time, get the latest
+    latest_file = max(files, key=os.path.getmtime)
+    print(f"Loading: {latest_file}")
+    return pd.read_csv(latest_file)
+
+# Carregar dados
+print("Looking for analysis files...")
+low = load_latest_csv('analysis/LOW_LOAD_*.csv')
+medium = load_latest_csv('analysis/MEDIUM_LOAD_*.csv')
+high = load_latest_csv('analysis/HIGH_LOAD_*.csv')
+
+# Check if we have all data
+if low is None or medium is None or high is None:
+    print("\nError: Missing analysis files!")
+    print("Please run the batch analysis first:")
+    exit(1)
+
+# Print available columns for debugging
+print("\nAvailable columns in LOW_LOAD CSV:")
+print(low.columns.tolist())
+
+# Create output directory for graphs
+os.makedirs('graphs', exist_ok=True)
+
+# 1. Gráfico: Dwelling Time vs Load
+plt.figure(figsize=(10, 6))
+dwelling_times = [
+    low['TempoMédioSistema'].mean(),
+    medium['TempoMédioSistema'].mean(),
+    high['TempoMédioSistema'].mean()
+]
+plt.bar(['Low', 'Medium', 'High'], dwelling_times, color=['green', 'orange', 'red'])
+plt.ylabel('Average Dwelling Time (s)')
+plt.title('System Performance vs Load')
+plt.xlabel('Load Scenario')
+plt.grid(axis='y', alpha=0.3)
+for i, v in enumerate(dwelling_times):
+    plt.text(i, v + 1, f'{v:.2f}s', ha='center', va='bottom')
+plt.savefig('graphs/dwelling_time_comparison.png', dpi=300, bbox_inches='tight')
+print("\nGraph saved: graphs/dwelling_time_comparison.png")
+plt.close()
+
+# 2. Gráfico: Completion Rate vs Load
+plt.figure(figsize=(10, 6))
+completion_rates = [
+    low['TaxaConclusão'].mean(),
+    medium['TaxaConclusão'].mean(),
+    high['TaxaConclusão'].mean()
+]
+plt.bar(['Low', 'Medium', 'High'], completion_rates, color=['green', 'orange', 'red'])
+plt.ylabel('Completion Rate (%)')
+plt.title('Vehicle Completion Rate vs Load')
+plt.xlabel('Load Scenario')
+plt.grid(axis='y', alpha=0.3)
+plt.ylim(0, 100)
+for i, v in enumerate(completion_rates):
+    plt.text(i, v + 2, f'{v:.1f}%', ha='center', va='bottom')
+plt.savefig('graphs/completion_rate_comparison.png', dpi=300, bbox_inches='tight')
+print("Graph saved: graphs/completion_rate_comparison.png")
+plt.close()
+
+# 3. Gráfico: Waiting Time vs Load
+plt.figure(figsize=(10, 6))
+waiting_times = [
+    low['TempoMédioEspera'].mean(),
+    medium['TempoMédioEspera'].mean(),
+    high['TempoMédioEspera'].mean()
+]
+plt.bar(['Low', 'Medium', 'High'], waiting_times, color=['green', 'orange', 'red'])
+plt.ylabel('Average Waiting Time (s)')
+plt.title('Average Waiting Time vs Load')
+plt.xlabel('Load Scenario')
+plt.grid(axis='y', alpha=0.3)
+for i, v in enumerate(waiting_times):
+    plt.text(i, v + 1, f'{v:.2f}s', ha='center', va='bottom')
+plt.savefig('graphs/waiting_time_comparison.png', dpi=300, bbox_inches='tight')
+print("Graph saved: graphs/waiting_time_comparison.png")
+plt.close()
+
+# 4. Gráfico: Summary Statistics
+fig, ((ax1, ax2), (ax3, ax4)) = plt.subplots(2, 2, figsize=(14, 10))
+loads = ['Low', 'Medium', 'High']
+
+# Vehicles generated
+ax1.bar(loads, [low['VeículosGerados'].mean(), medium['VeículosGerados'].mean(), high['VeículosGerados'].mean()], color=['green', 'orange', 'red'])
+ax1.set_title('Vehicles Generated')
+ax1.set_ylabel('Count')
+ax1.grid(axis='y', alpha=0.3)
+
+# Vehicles completed
+ax2.bar(loads, [low['VeículosCompletados'].mean(), medium['VeículosCompletados'].mean(), high['VeículosCompletados'].mean()], color=['green', 'orange', 'red'])
+ax2.set_title('Vehicles Completed')
+ax2.set_ylabel('Count')
+ax2.grid(axis='y', alpha=0.3)
+
+# Min/Max dwelling time
+x = range(3)
+width = 0.35
+ax3.bar([i - width/2 for i in x], [low['TempoMínimoSistema'].mean(), medium['TempoMínimoSistema'].mean(), high['TempoMínimoSistema'].mean()], width, label='Min', color='lightblue')
+ax3.bar([i + width/2 for i in x], [low['TempoMáximoSistema'].mean(), medium['TempoMáximoSistema'].mean(), high['TempoMáximoSistema'].mean()], width, label='Max', color='darkblue')
+ax3.set_title('Min/Max Dwelling Time')
+ax3.set_ylabel('Time (s)')
+ax3.set_xticks(x)
+ax3.set_xticklabels(loads)
+ax3.legend()
+ax3.grid(axis='y', alpha=0.3)
+
+# Performance summary
+metrics = ['Dwelling\nTime', 'Waiting\nTime', 'Completion\nRate']
+low_vals = [low['TempoMédioSistema'].mean(), low['TempoMédioEspera'].mean(), low['TaxaConclusão'].mean()]
+med_vals = [medium['TempoMédioSistema'].mean(), medium['TempoMédioEspera'].mean(), medium['TaxaConclusão'].mean()]
+high_vals = [high['TempoMédioSistema'].mean(), high['TempoMédioEspera'].mean(), high['TaxaConclusão'].mean()]
+
+x = range(len(metrics))
+width = 0.25
+ax4.bar([i - width for i in x], low_vals, width, label='Low', color='green')
+ax4.bar(x, med_vals, width, label='Medium', color='orange')
+ax4.bar([i + width for i in x], high_vals, width, label='High', color='red')
+ax4.set_title('Performance Summary')
+ax4.set_xticks(x)
+ax4.set_xticklabels(metrics)
+ax4.legend()
+ax4.grid(axis='y', alpha=0.3)
+
+plt.tight_layout()
+plt.savefig('graphs/summary_statistics.png', dpi=300, bbox_inches='tight')
+print("Graph saved: graphs/summary_statistics.png")
+plt.close()
+
+# Print summary statistics
+print("\n" + "="*60)
+print("SUMMARY STATISTICS")
+print("="*60)
+print(f"\nLOW LOAD:")
+print(f"  Avg Dwelling Time: {low['TempoMédioSistema'].mean():.2f}s")
+print(f"  Avg Waiting Time: {low['TempoMédioEspera'].mean():.2f}s")
+print(f"  Completion Rate: {low['TaxaConclusão'].mean():.1f}%")
+print(f"  Vehicles Generated: {low['VeículosGerados'].mean():.0f}")
+print(f"  Vehicles Completed: {low['VeículosCompletados'].mean():.0f}")
+
+print(f"\nMEDIUM LOAD:")
+print(f"  Avg Dwelling Time: {medium['TempoMédioSistema'].mean():.2f}s")
+print(f"  Avg Waiting Time: {medium['TempoMédioEspera'].mean():.2f}s")
+print(f"  Completion Rate: {medium['TaxaConclusão'].mean():.1f}%")
+print(f"  Vehicles Generated: {medium['VeículosGerados'].mean():.0f}")
+print(f"  Vehicles Completed: {medium['VeículosCompletados'].mean():.0f}")
+
+print(f"\nHIGH LOAD:")
+print(f"  Avg Dwelling Time: {high['TempoMédioSistema'].mean():.2f}s")
+print(f"  Avg Waiting Time: {high['TempoMédioEspera'].mean():.2f}s")
+print(f"  Completion Rate: {high['TaxaConclusão'].mean():.1f}%")
+print(f"  Vehicles Generated: {high['VeículosGerados'].mean():.0f}")
+print(f"  Vehicles Completed: {high['VeículosCompletados'].mean():.0f}")
+
+print("\n" + "="*60)
+print("All graphs saved in 'graphs/' directory!")
+print("="*60)

main/pom.xml

@@ -29,6 +29,18 @@
             <artifactId>gson</artifactId>
             <version>2.10.1</version>
         </dependency>
+
+        <!-- JavaFX for UI -->
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>17.0.2</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-fxml</artifactId>
+            <version>17.0.2</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -39,7 +51,16 @@
                 <artifactId>exec-maven-plugin</artifactId>
                 <version>3.1.0</version>
                 <configuration>
-                    <mainClass>sd.Entry</mainClass>
+                    <mainClass>sd.dashboard.Launcher</mainClass>
+                </configuration>
+            </plugin>
+            <!-- JavaFX Maven Plugin -->
+            <plugin>
+                <groupId>org.openjfx</groupId>
+                <artifactId>javafx-maven-plugin</artifactId>
+                <version>0.0.8</version>
+                <configuration>
+                    <mainClass>sd.dashboard.Launcher</mainClass>
                 </configuration>
             </plugin>
             <plugin>
@@ -55,7 +76,7 @@
                         <configuration>
                             <transformers>
                                 <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                    <mainClass>sd.Entry</mainClass>
+                                    <mainClass>sd.dashboard.Launcher</mainClass>
                                 </transformer>
                             </transformers>
                         </configuration>

main/src/main/java/sd/Entry.java

@@ -1,94 +0,0 @@
-package sd;
-
-import java.io.IOException;
-
-import sd.config.SimulationConfig;
-import sd.engine.SimulationEngine;
-
-/**
- * Main entry point for the traffic simulation.
- * * This class is responsible for loading the simulation configuration,
- * initializing the {@link SimulationEngine}, and starting the simulation run.
- * It also prints initial configuration details and final execution time.
- */
-public class Entry {
-    
-    /**
-     * The default path to the simulation configuration file.
-     * This is used if no command-line arguments are provided.
-     */
-    private static final String DEFAULT_CONFIG_FILE = "src/main/resources/simulation.properties";
-    
-    /**
-     * The main method to start the simulation.
-     * * @param args Command-line arguments. If provided, args[0] is expected
-     * to be the path to a custom configuration file.
-     */
-    public static void main(String[] args) {
-        System.out.println("=".repeat(60));
-        System.out.println("TRAFFIC SIMULATION - DISCRETE EVENT SIMULATOR");
-        System.out.println("=".repeat(60));
-        
-        try {
-            // 1. Load configuration
-            String configFile = args.length > 0 ? args[0] : DEFAULT_CONFIG_FILE;
-            System.out.println("Loading configuration from: " + configFile);
-            
-            SimulationConfig config = new SimulationConfig(configFile);
-            
-            // 2. Display configuration
-            displayConfiguration(config);
-            
-            // 3. Create and initialize simulation engine
-            SimulationEngine engine = new SimulationEngine(config);
-            engine.initialize();
-            
-            System.out.println("\n" + "=".repeat(60));
-            
-            // 4. Run simulation
-            long startTime = System.currentTimeMillis();
-            engine.run();
-            long endTime = System.currentTimeMillis();
-            
-            // 5. Display execution time
-            double executionTime = (endTime - startTime) / 1000.0;
-            System.out.println("\nExecution time: " + String.format("%.2f", executionTime) + " seconds");
-            System.out.println("=".repeat(60));
-            
-        } catch (IOException e) {
-            System.err.println("Error loading configuration: " + e.getMessage());
-            e.printStackTrace();
-        } catch (Exception e) {
-            System.err.println("Error during simulation: " + e.getMessage());
-            e.printStackTrace();
-        }
-    }
-    
-    /**
-     * Displays the main configuration parameters to the console.
-     * This provides a summary of the simulation settings before it starts.
-     *
-     * @param config The {@link SimulationConfig} object containing the loaded settings.
-     */
-    private static void displayConfiguration(SimulationConfig config) {
-        System.out.println("\nSIMULATION CONFIGURATION:");
-        System.out.println("  Duration: " + config.getSimulationDuration() + " seconds");
-        System.out.println("  Arrival Model: " + config.getArrivalModel());
-        
-        if ("POISSON".equalsIgnoreCase(config.getArrivalModel())) {
-            System.out.println("  Arrival Rate (λ): " + config.getArrivalRate() + " vehicles/second");
-        } else {
-            System.out.println("  Fixed Interval: " + config.getFixedArrivalInterval() + " seconds");
-        }
-        
-        System.out.println("  Statistics Update Interval: " + config.getStatisticsUpdateInterval() + " seconds");
-        
-        System.out.println("\nVEHICLE TYPES:");
-        System.out.println("  Bike: " + (config.getBikeVehicleProbability() * 100) + "% " +
-                         "(crossing time: " + config.getBikeVehicleCrossingTime() + "s)");
-        System.out.println("  Light: " + (config.getLightVehicleProbability() * 100) + "% " +
-                         "(crossing time: " + config.getLightVehicleCrossingTime() + "s)");
-        System.out.println("  Heavy: " + (config.getHeavyVehicleProbability() * 100) + "% " +
-                         "(crossing time: " + config.getHeavyVehicleCrossingTime() + "s)");
-    }
-}

main/src/main/java/sd/ExitNodeProcess.java

@@ -0,0 +1,557 @@
+package sd;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+import sd.config.SimulationConfig;
+import sd.coordinator.SocketClient;
+import sd.dashboard.StatsUpdatePayload;
+import sd.des.DESEventType;
+import sd.des.EventQueue;
+import sd.des.SimulationClock;
+import sd.des.SimulationEvent;
+import sd.logging.EventLogger;
+import sd.logging.EventType;
+import sd.logging.VehicleTracer;
+import sd.model.Message;
+import sd.model.MessageType;
+import sd.model.Vehicle;
+import sd.model.VehicleType;
+import sd.protocol.MessageProtocol;
+import sd.protocol.SocketConnection;
+
+/**
+ * Destino final de todos os veículos da simulação (nó de saída S).
+ * 
+ * <p>Opera como sumidouro da rede:
+ * <ol>
+ * <li>Recebe veículos que completaram a viagem
+ * <li>Regista estatísticas finais (tempo total, espera, travessia)
+ * <li>Envia métricas ao dashboard em tempo real
+ * </ol>
+ * 
+ * <p>Participa no DES rastreando eventos, mas opera principalmente
+ * de forma reativa, aguardando chegadas via socket.
+ */
+public class ExitNodeProcess {
+
+    private final SimulationConfig config;
+    private ServerSocket serverSocket;
+    private final ExecutorService connectionHandlerPool;
+
+    // DES components
+    private final SimulationClock clock;
+    private final EventQueue eventQueue;
+    private final EventLogger eventLogger;
+    private Thread eventProcessorThread;
+
+    /** Flag de controlo (volatile para visibilidade entre threads) */
+    private volatile boolean running;
+
+    /** Instante de início da simulação (milissegundos) */
+    private long simulationStartMillis;
+
+    /** Contador de veículos que completaram a rota */
+    private int totalVehiclesReceived;
+
+    /** Tempo acumulado no sistema de todos os veículos */
+    private double totalSystemTime;
+
+    /** Tempo acumulado em espera de todos os veículos */
+    private double totalWaitingTime;
+
+    /** Tempo acumulado em travessia de todos os veículos */
+    private double totalCrossingTime;
+
+    /** Contagem de veículos por tipo */
+    private final Map<VehicleType, Integer> vehicleTypeCount;
+
+    /** Tempo de espera acumulado por tipo de veículo */
+    private final Map<VehicleType, Double> vehicleTypeWaitTime;
+
+    /** Cliente socket para envio de estatísticas ao dashboard */
+    private SocketClient dashboardClient;
+
+    /**
+     * Ponto de entrada do processo.
+     * 
+     * @param args args[0] (opcional) = caminho do ficheiro de configuração
+     */
+    public static void main(String[] args) {
+        System.out.println("=".repeat(60));
+        System.out.println("EXIT NODE PROCESS");
+        System.out.println("=".repeat(60));
+
+        try {
+            EventLogger.getInstance().log(EventType.PROCESS_STARTED, "ExitNode", "Exit node process started");
+
+            String configFile = args.length > 0 ? args[0] : "src/main/resources/simulation.properties";
+            System.out.println("Loading configuration from: " + configFile);
+
+            SimulationConfig config = new SimulationConfig(configFile);
+            ExitNodeProcess exitNode = new ExitNodeProcess(config);
+
+            System.out.println("\n" + "=".repeat(60));
+            exitNode.initialize();
+
+            System.out.println("\n" + "=".repeat(60));
+            exitNode.start();
+
+        } catch (IOException e) {
+            System.err.println("Failed to start exit node: " + e.getMessage());
+            EventLogger.getInstance().logError("ExitNode", "Failed to start", e);
+            System.exit(1);
+        } catch (Exception e) {
+            System.err.println("Exit node error: " + e.getMessage());
+            EventLogger.getInstance().logError("ExitNode", "Exit node error", e);
+            System.exit(1);
+        } finally {
+            EventLogger.getInstance().log(EventType.PROCESS_STOPPED, "ExitNode", "Exit node process stopped");
+        }
+    }
+
+    /**
+     * Configura o Nó de Saída.
+     * 
+     * Inicializamos os nossos contadores, preparamos a pool de threads para tratar
+     * das ligações de veículos recebidas,
+     * e configuramos os componentes DES para rastreio de eventos.
+     * 
+     * @param config A configuração da simulação.
+     */
+    public ExitNodeProcess(SimulationConfig config) {
+        this.config = config;
+        this.connectionHandlerPool = Executors.newCachedThreadPool();
+        this.running = false;
+
+        this.totalVehiclesReceived = 0;
+        this.totalSystemTime = 0.0;
+        this.totalWaitingTime = 0.0;
+        this.totalCrossingTime = 0.0;
+        this.vehicleTypeCount = new HashMap<>();
+        this.vehicleTypeWaitTime = new HashMap<>();
+
+        // Inicializa os counters para cada tipo de veículo
+        for (VehicleType type : VehicleType.values()) {
+            vehicleTypeCount.put(type, 0);
+            vehicleTypeWaitTime.put(type, 0.0);
+        }
+
+        // Initialize DES components
+        this.clock = new SimulationClock();
+        this.eventQueue = new EventQueue(true); // Track history
+        this.eventLogger = EventLogger.getInstance();
+
+        eventLogger.log(EventType.PROCESS_STARTED, "ExitNode",
+                "Exit node initialized with DES architecture");
+
+        System.out.println("Exit node initialized (DES Mode)");
+        System.out.println("  - Exit port: " + config.getExitPort());
+        System.out.println("  - Dashboard: " + config.getDashboardHost() + ":" + config.getDashboardPort());
+    }
+
+    /**
+     * Tenta estabelecer uma ligação ao dashboard.
+     * Se for bem-sucedido, poderemos enviar estatísticas em tempo real. Se não,
+     * apenas registamos localmente.
+     */
+    public void initialize() {
+        System.out.println("Connecting to dashboard...");
+
+        try {
+            String host = config.getDashboardHost();
+            int port = config.getDashboardPort();
+
+            dashboardClient = new SocketClient("Dashboard", host, port);
+            dashboardClient.connect();
+
+            System.out.println("Successfully connected to dashboard");
+        } catch (IOException e) {
+            System.err.println("WARNING: Failed to connect to dashboard: " + e.getMessage());
+            System.err.println("Exit node will continue without dashboard connection");
+        }
+    }
+
+    /**
+     * Starts the DES event processing thread.
+     * Currently, ExitNode is primarily reactive (receives vehicles via network),
+     * but maintains event queue for potential scheduled events and history
+     * tracking.
+     */
+    private void startEventProcessor() {
+        eventProcessorThread = new Thread(() -> {
+            eventLogger.log(EventType.SIMULATION_STARTED, "ExitNode",
+                    "Event processor thread started");
+
+            // Keep running while process is active
+            while (running) {
+                SimulationEvent event = eventQueue.poll();
+                if (event == null) {
+                    // No events currently, wait before checking again
+                    try {
+                        Thread.sleep(100);
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                        break;
+                    }
+                    continue;
+                }
+
+                // Advance clock to event time
+                clock.advanceTo(event.getTimestamp());
+
+                // Process the event
+                processEvent(event);
+            }
+
+            eventLogger.log(EventType.SIMULATION_STOPPED, "ExitNode",
+                    String.format("Event processor thread terminated at time %.2f", clock.getCurrentTime()));
+        }, "EventProcessor-ExitNode");
+
+        eventProcessorThread.start();
+    }
+
+    /**
+     * Processes a discrete event based on its type.
+     * Currently supports VEHICLE_EXIT and SIMULATION_END events.
+     */
+    private void processEvent(SimulationEvent event) {
+        try {
+            switch (event.getType()) {
+                case VEHICLE_EXIT:
+                    // Vehicle exits are handled via network messages in real-time
+                    // This event type can be used for scheduled vehicle processing
+                    break;
+
+                case SIMULATION_END:
+                    handleSimulationEndEvent(event);
+                    break;
+
+                default:
+                    System.err.println("[ExitNode] Unknown event type: " + event.getType());
+            }
+        } catch (Exception e) {
+            System.err.println("[ExitNode] Error processing event " + event.getType() +
+                    " at time " + event.getTimestamp() + ": " + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Handles simulation end event.
+     */
+    private void handleSimulationEndEvent(SimulationEvent event) {
+        eventLogger.log(EventType.SIMULATION_STOPPED, "ExitNode",
+                String.format("Simulation ended at time %.2f", event.getTimestamp()));
+        running = false;
+
+        // Print final statistics
+        printFinalStatistics();
+    }
+
+    /**
+     * Exports the complete event history for the exit node.
+     * This satisfies the spec requirement: "Deve ser possível verificar a lista
+     * completa de eventos"
+     */
+    public void exportEventHistory(String outputPath) {
+        String history = eventQueue.exportEventHistory();
+        try (java.io.PrintWriter writer = new java.io.PrintWriter(outputPath)) {
+            writer.println(history);
+            System.out.println("[ExitNode] Event history exported to: " + outputPath);
+        } catch (java.io.FileNotFoundException e) {
+            System.err.println("[ExitNode] Failed to export event history: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Schedules a simulation end event at the specified time.
+     * 
+     * @param endTime The simulation time when the simulation should end
+     */
+    public void scheduleSimulationEnd(double endTime) {
+        SimulationEvent endEvent = new SimulationEvent(
+                endTime,
+                DESEventType.SIMULATION_END,
+                null);
+        eventQueue.schedule(endEvent);
+        System.out.println("[ExitNode] Simulation end scheduled at time " + endTime);
+    }
+
+    /**
+     * Abre o socket do servidor e começa a escutar por veículos.
+     * 
+     * Este é o loop principal. Aceitamos ligações das interseções (de onde vêm os
+     * veículos)
+     * e passamo-las para a nossa pool de threads para processamento.
+     * 
+     * @throws IOException Se não conseguirmos fazer bind à porta.
+     */
+    public void start() throws IOException {
+        start(true); // Default to DES mode
+    }
+
+    /**
+     * Starts the exit node process.
+     * 
+     * @param useDES If true, starts event processor for DES mode tracking
+     */
+    public void start(boolean useDES) throws IOException {
+        int port = config.getExitPort();
+        serverSocket = new ServerSocket(port);
+        running = true;
+        simulationStartMillis = System.currentTimeMillis();
+
+        System.out.println("Exit node started on port " + port);
+        if (useDES) {
+            // Note: ExitNode is primarily reactive (network-driven), but maintains
+            // event queue for simulation end events and history tracking
+            System.out.println("Running in DES mode (event history tracking enabled)");
+        }
+        System.out.println("Waiting for vehicles...\\n");
+
+        while (running) {
+            try {
+                Socket clientSocket = serverSocket.accept();
+                connectionHandlerPool.submit(() -> handleIncomingConnection(clientSocket));
+            } catch (IOException e) {
+                if (running) {
+                    System.err.println("Error accepting connection: " + e.getMessage());
+                }
+            }
+        }
+    }
+
+    /**
+     * Trata uma ligação de uma interseção.
+     * 
+     * Mantemos a ligação aberta e escutamos por mensagens `VEHICLE_TRANSFER`.
+     * Cada mensagem contém um veículo que acabou de terminar a sua viagem.
+     * 
+     * @param clientSocket O socket ligado à interseção.
+     */
+    private void handleIncomingConnection(Socket clientSocket) {
+        String clientAddress = clientSocket.getInetAddress().getHostAddress();
+        System.out.println("New connection accepted from " + clientAddress);
+
+        try (SocketConnection connection = new SocketConnection(clientSocket)) {
+
+            while (running && connection.isConnected()) {
+                try {
+                    System.out.println("[Exit] Waiting for message from " + clientAddress);
+                    MessageProtocol message = connection.receiveMessage();
+                    System.out.println("[Exit] Received message type: " + message.getType() +
+                            " from " + message.getSourceNode());
+
+                    if (message.getType() == MessageType.SIMULATION_START) {
+                        // Coordinator sends start time - use it instead of our local start
+                        simulationStartMillis = ((Number) message.getPayload()).longValue();
+                        System.out.println("[Exit] Simulation start time synchronized");
+                    } else if (message.getType() == MessageType.VEHICLE_TRANSFER) {
+                        Object payload = message.getPayload();
+                        System.out.println("[Exit] Payload type: " + payload.getClass().getName());
+
+                        // Handle Gson LinkedHashMap
+                        Vehicle vehicle;
+                        if (payload instanceof com.google.gson.internal.LinkedTreeMap ||
+                                payload instanceof java.util.LinkedHashMap) {
+                            String json = new com.google.gson.Gson().toJson(payload);
+                            vehicle = new com.google.gson.Gson().fromJson(json, Vehicle.class);
+                        } else {
+                            vehicle = (Vehicle) payload;
+                        }
+
+                        processExitingVehicle(vehicle);
+                    }
+
+                } catch (ClassNotFoundException e) {
+                    System.err.println("[Exit] Unknown message type: " + e.getMessage());
+                    e.printStackTrace();
+                } catch (Exception e) {
+                    System.err.println("[Exit] Error processing message: " + e.getMessage());
+                    e.printStackTrace();
+                }
+            }
+
+            System.out.println("[Exit] Connection closed from " + clientAddress);
+
+        } catch (IOException e) {
+            if (running) {
+                System.err.println("[Exit] Connection error from " + clientAddress + ": " + e.getMessage());
+                e.printStackTrace();
+            }
+        }
+    }
+
+    /**
+     * Processa um veículo que acabou de sair do sistema.
+     * 
+     * Calculamos quanto tempo demorou, atualizamos as nossas estatísticas globais e
+     * notificamos o dashboard.
+     * Este método é sincronizado porque múltiplos veículos podem chegar ao mesmo
+     * tempo.
+     * 
+     * @param vehicle O veículo que completou a sua rota.
+     */
+    private synchronized void processExitingVehicle(Vehicle vehicle) {
+        totalVehiclesReceived++;
+
+        // Use simulation time instead of wall-clock time
+        // System time = total time vehicle spent in system (wait + crossing times)
+        // This represents the actual simulation time elapsed, not real-time
+        double waitTime = vehicle.getTotalWaitingTime();
+        double crossingTime = vehicle.getTotalCrossingTime();
+        double systemTime = waitTime + crossingTime;
+
+        // Store times in seconds, will be converted to ms when sending to dashboard
+        totalSystemTime += systemTime;
+        totalWaitingTime += waitTime;
+        totalCrossingTime += crossingTime;
+
+        VehicleType type = vehicle.getType();
+        vehicleTypeCount.put(type, vehicleTypeCount.get(type) + 1);
+        vehicleTypeWaitTime.put(type, vehicleTypeWaitTime.get(type) + waitTime);
+
+        System.out.printf("[Exit] Vehicle %s completed (type=%s, system_time=%.2fs, wait=%.2fs, crossing=%.2fs)%n",
+                vehicle.getId(), vehicle.getType(), systemTime, waitTime, crossingTime);
+
+        // Log vehicle exit
+        EventLogger.getInstance().logVehicle(EventType.VEHICLE_EXITED, "ExitNode", vehicle.getId(),
+                String.format("Completed - System: %.2fs, Wait: %.2fs, Crossing: %.2fs", systemTime, waitTime,
+                        crossingTime));
+
+        // Complete vehicle trace if tracking
+        VehicleTracer.getInstance().logExit(vehicle, systemTime);
+
+        // Send stats after every vehicle to ensure dashboard updates quickly
+        sendStatsToDashboard();
+    }
+
+    /**
+     * Envia as estatísticas mais recentes para o dashboard.
+     * 
+     * Empacotamos as contagens totais e os tempos médios num `StatsUpdatePayload`
+     * e enviamo-lo.
+     */
+    private void sendStatsToDashboard() {
+        if (dashboardClient == null || !dashboardClient.isConnected()) {
+            return;
+        }
+
+        try {
+            // Create stats payload
+            StatsUpdatePayload payload = new StatsUpdatePayload();
+
+            // Set global stats - convert seconds to milliseconds
+            payload.setTotalVehiclesCompleted(totalVehiclesReceived);
+            payload.setTotalSystemTime((long) (totalSystemTime * 1000.0)); // s -> ms
+            payload.setTotalWaitingTime((long) (totalWaitingTime * 1000.0)); // s -> ms
+
+            // Set intersection-like stats so it shows up correctly in the dashboard table
+            payload.setIntersectionArrivals(totalVehiclesReceived);
+            payload.setIntersectionDepartures(totalVehiclesReceived);
+            payload.setIntersectionQueueSize(0);
+
+            // Set vehicle type stats
+            Map<VehicleType, Integer> typeCounts = new HashMap<>();
+            Map<VehicleType, Long> typeWaitTimes = new HashMap<>();
+
+            for (VehicleType type : VehicleType.values()) {
+                typeCounts.put(type, vehicleTypeCount.get(type));
+                typeWaitTimes.put(type, (long) (vehicleTypeWaitTime.get(type) * 1000.0)); // s -> ms
+            }
+
+            payload.setVehicleTypeCounts(typeCounts);
+            payload.setVehicleTypeWaitTimes(typeWaitTimes);
+
+            // Send message
+            Message message = new Message(
+                    MessageType.STATS_UPDATE,
+                    "ExitNode",
+                    "Dashboard",
+                    payload);
+
+            dashboardClient.send(message);
+
+            double avgWait = totalVehiclesReceived > 0 ? totalWaitingTime / totalVehiclesReceived : 0.0;
+            System.out.printf("[Exit] Sent stats to dashboard (total=%d, avg_wait=%.2fs)%n",
+                    totalVehiclesReceived, avgWait);
+
+        } catch (Exception e) {
+            System.err.println("[Exit] Failed to send stats to dashboard: " + e.getMessage());
+        }
+    }
+
+    /**
+     * Encerra graciosamente o processo.
+     * 
+     * Imprimimos as estatísticas finais, fechamos ligações e limpamos threads.
+     */
+    public void shutdown() {
+        System.out.println("\n[Exit] Shutting down...");
+        running = false;
+
+        printFinalStatistics();
+
+        sendStatsToDashboard();
+
+        try {
+            if (serverSocket != null && !serverSocket.isClosed()) {
+                serverSocket.close();
+            }
+        } catch (IOException e) {
+            System.err.println("Error closing server socket: " + e.getMessage());
+        }
+
+        connectionHandlerPool.shutdown();
+        try {
+            if (!connectionHandlerPool.awaitTermination(5, TimeUnit.SECONDS)) {
+                connectionHandlerPool.shutdownNow();
+            }
+        } catch (InterruptedException e) {
+            connectionHandlerPool.shutdownNow();
+        }
+
+        if (dashboardClient != null) {
+            dashboardClient.close();
+        }
+
+        System.out.println("[Exit] Shutdown complete.");
+        System.out.println("=".repeat(60));
+    }
+
+    /**
+     * Imprime um resumo dos resultados da simulação na consola.
+     * Isto dá-nos uma visão rápida de como a simulação correu (médias, contagens de
+     * veículos, etc.).
+     */
+    private void printFinalStatistics() {
+        System.out.println("\n=== EXIT NODE STATISTICS ===");
+        System.out.printf("Total Vehicles Completed: %d%n", totalVehiclesReceived);
+
+        if (totalVehiclesReceived > 0) {
+            System.out.printf("%nAVERAGE METRICS:%n");
+            System.out.printf("  System Time: %.2f seconds%n", totalSystemTime / totalVehiclesReceived);
+            System.out.printf("  Waiting Time: %.2f seconds%n", totalWaitingTime / totalVehiclesReceived);
+            System.out.printf("  Crossing Time: %.2f seconds%n", totalCrossingTime / totalVehiclesReceived);
+        }
+
+        System.out.println("\nVEHICLE TYPE DISTRIBUTION:");
+        for (VehicleType type : VehicleType.values()) {
+            int count = vehicleTypeCount.get(type);
+            if (count > 0) {
+                double percentage = (count * 100.0) / totalVehiclesReceived;
+                double avgWait = vehicleTypeWaitTime.get(type) / count;
+                System.out.printf("  %s: %d (%.1f%%), Avg Wait: %.2fs%n",
+                        type, count, percentage, avgWait);
+            }
+        }
+    }
+
+}

main/src/main/java/sd/analysis/MultiRunAnalyzer.java

@@ -0,0 +1,234 @@
+package sd.analysis;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.Set;
+import java.util.TreeSet;
+
+import sd.model.VehicleType;
+
+/**
+ * Executes multiple simulation runs and aggregates results.
+ * Calculates statistical measures including mean, standard deviation,
+ * and confidence intervals across all runs.
+ */
+public class MultiRunAnalyzer {
+    
+    private final List<SimulationRunResult> results;
+    private final String configurationFile;
+    
+    public MultiRunAnalyzer(String configurationFile) {
+        this.configurationFile = configurationFile;
+        this.results = new ArrayList<>();
+    }
+    
+    /**
+     * Adds a completed simulation run result.
+     */
+    public void addResult(SimulationRunResult result) {
+        results.add(result);
+    }
+    
+    /**
+     * Gets the number of completed runs.
+     */
+    public int getRunCount() {
+        return results.size();
+    }
+    
+    /**
+     * Generates a comprehensive statistical report.
+     */
+    public String generateReport() {
+        if (results.isEmpty()) {
+            return "No simulation results to analyze.";
+        }
+        
+        StringBuilder report = new StringBuilder();
+        
+        // Header
+        report.append("=".repeat(80)).append("\n");
+        report.append("ANÁLISE ESTATÍSTICA MULTI-EXECUÇÃO\n");
+        report.append("=".repeat(80)).append("\n");
+        report.append("Configuração: ").append(configurationFile).append("\n");
+        report.append("Número de Execuções: ").append(results.size()).append("\n");
+        report.append("Data da Análise: ").append(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())).append("\n");
+        report.append("\n");
+        
+        // Global metrics
+        report.append("-".repeat(80)).append("\n");
+        report.append("MÉTRICAS GLOBAIS\n");
+        report.append("-".repeat(80)).append("\n\n");
+        
+        report.append(analyzeMetric("Veículos Gerados", 
+            extractValues(r -> (double) r.getTotalVehiclesGenerated())));
+        report.append("\n");
+        
+        report.append(analyzeMetric("Veículos Completados", 
+            extractValues(r -> (double) r.getTotalVehiclesCompleted())));
+        report.append("\n");
+        
+        report.append(analyzeMetric("Taxa de Conclusão (%)", 
+            extractValues(r -> r.getTotalVehiclesGenerated() > 0 
+                ? 100.0 * r.getTotalVehiclesCompleted() / r.getTotalVehiclesGenerated() 
+                : 0.0)));
+        report.append("\n");
+        
+        report.append(analyzeMetric("Tempo Médio no Sistema (segundos)", 
+            extractValues(r -> r.getAverageSystemTime())));
+        report.append("\n");
+        
+        report.append(analyzeMetric("Tempo Médio de Espera (segundos)", 
+            extractValues(r -> r.getAverageWaitingTime())));
+        report.append("\n");
+        
+        // Per-vehicle-type analysis
+        report.append("\n");
+        report.append("-".repeat(80)).append("\n");
+        report.append("ANÁLISE POR TIPO DE VEÍCULO\n");
+        report.append("-".repeat(80)).append("\n\n");
+        
+        for (VehicleType type : VehicleType.values()) {
+            report.append("--- ").append(type).append(" ---\n");
+            
+            report.append(analyzeMetric("  Contagem de Veículos", 
+                extractValues(r -> (double) r.getVehicleCountByType().getOrDefault(type, 0))));
+            report.append("\n");
+            
+            report.append(analyzeMetric("  Tempo Médio no Sistema (segundos)", 
+                extractValues(r -> r.getAvgSystemTimeByType().getOrDefault(type, 0.0))));
+            report.append("\n");
+            
+            report.append(analyzeMetric("  Tempo Médio de Espera (segundos)", 
+                extractValues(r -> r.getAvgWaitTimeByType().getOrDefault(type, 0.0))));
+            report.append("\n\n");
+        }
+        
+        // Per-intersection analysis
+        report.append("-".repeat(80)).append("\n");
+        report.append("ANÁLISE POR INTERSEÇÃO\n");
+        report.append("-".repeat(80)).append("\n\n");
+        
+        Set<String> allIntersections = new TreeSet<>();
+        for (SimulationRunResult result : results) {
+            allIntersections.addAll(result.getMaxQueueSizeByIntersection().keySet());
+        }
+        
+        for (String intersection : allIntersections) {
+            report.append("--- ").append(intersection).append(" ---\n");
+            
+            report.append(analyzeMetric("  Tamanho Máximo da Fila", 
+                extractValues(r -> (double) r.getMaxQueueSizeByIntersection().getOrDefault(intersection, 0))));
+            report.append("\n");
+            
+            report.append(analyzeMetric("  Tamanho Médio da Fila", 
+                extractValues(r -> r.getAvgQueueSizeByIntersection().getOrDefault(intersection, 0.0))));
+            report.append("\n");
+            
+            report.append(analyzeMetric("  Veículos Processados", 
+                extractValues(r -> (double) r.getVehiclesProcessedByIntersection().getOrDefault(intersection, 0))));
+            report.append("\n\n");
+        }
+        
+        // Individual run summaries
+        report.append("-".repeat(80)).append("\n");
+        report.append("RESUMOS INDIVIDUAIS DAS EXECUÇÕES\n");
+        report.append("-".repeat(80)).append("\n\n");
+        
+        for (SimulationRunResult result : results) {
+            report.append(result.toString()).append("\n\n");
+        }
+        
+        report.append("=".repeat(80)).append("\n");
+        report.append("FIM DO RELATÓRIO\n");
+        report.append("=".repeat(80)).append("\n");
+        
+        return report.toString();
+    }
+    
+    /**
+     * Analyzes a single metric and returns formatted statistics.
+     */
+    private String analyzeMetric(String metricName, List<Double> values) {
+        if (values.isEmpty() || values.stream().allMatch(v -> v == 0.0)) {
+            return metricName + ": Sem dados\n";
+        }
+        
+        double mean = StatisticalAnalysis.mean(values);
+        double stdDev = StatisticalAnalysis.standardDeviation(values);
+        double[] ci = StatisticalAnalysis.confidenceInterval95(values);
+        double min = StatisticalAnalysis.min(values);
+        double max = StatisticalAnalysis.max(values);
+        double median = StatisticalAnalysis.median(values);
+        
+        return String.format(
+            "%s:\n" +
+            "    Média:   %10.2f    Desvio Padrão: %10.2f\n" +
+            "    Mediana: %10.2f    IC 95%%: [%.2f, %.2f]\n" +
+            "    Mín:     %10.2f    Máx:          %10.2f\n",
+            metricName, mean, stdDev, median, ci[0], ci[1], min, max
+        );
+    }
+    
+    /**
+     * Extracts values using a lambda function.
+     */
+    private List<Double> extractValues(java.util.function.Function<SimulationRunResult, Double> extractor) {
+        List<Double> values = new ArrayList<>();
+        for (SimulationRunResult result : results) {
+            values.add(extractor.apply(result));
+        }
+        return values;
+    }
+    
+    /**
+     * Saves the report to a file.
+     */
+    public void saveReport(String filename) throws IOException {
+        try (PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(filename)))) {
+            writer.print(generateReport());
+        }
+    }
+    
+    /**
+     * Generates a CSV summary for easy import into spreadsheet tools.
+     */
+    public void saveCSV(String filename) throws IOException {
+        saveCSVSummary(filename);
+    }
+    
+    /**
+     * Generates a CSV summary for easy import into spreadsheet tools.
+     */
+    public void saveCSVSummary(String filename) throws IOException {
+        try (PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(filename)))) {
+            // Header
+            writer.println("Execução,VeículosGerados,VeículosCompletados,TaxaConclusão," +
+                "TempoMédioSistema,TempoMédioEspera,TempoMínimoSistema,TempoMáximoSistema");
+            
+            // Data rows
+            for (SimulationRunResult result : results) {
+                double completionRate = result.getTotalVehiclesGenerated() > 0 
+                    ? 100.0 * result.getTotalVehiclesCompleted() / result.getTotalVehiclesGenerated() 
+                    : 0.0;
+                
+                writer.printf("%d,%d,%d,%.2f,%.2f,%.2f,%.2f,%.2f\n",
+                    result.getRunNumber(),
+                    result.getTotalVehiclesGenerated(),
+                    result.getTotalVehiclesCompleted(),
+                    completionRate,
+                    result.getAverageSystemTime(),
+                    result.getAverageWaitingTime(),
+                    result.getMinSystemTime(),
+                    result.getMaxSystemTime()
+                );
+            }
+        }
+    }
+}

main/src/main/java/sd/analysis/SimulationBatchRunner.java

@@ -0,0 +1,172 @@
+package sd.analysis;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+/**
+ * Orquestra múltiplas execuções de simulação para análise estatística.
+ * 
+ * Em vez de correr uma única simulação manualmente, esta ferramenta permite
+ * correr um "lote"
+ * de N simulações consecutivas. Isto é essencial para recolher dados
+ * estatisticamente significativos
+ * (calcular intervalos de confiança, etc.) conforme exigido pelas
+ * especificações do projeto.
+ * 
+ * Utilização:
+ * java sd.analysis.SimulationBatchRunner <ficheiro-config> <num-execucoes>
+ * <dir-saida>
+ */
+public class SimulationBatchRunner {
+
+    public static void main(String[] args) {
+        if (args.length < 3) {
+            System.err.println("Usage: SimulationBatchRunner <config-file> <num-runs> <output-dir>");
+            System.err.println("Example: SimulationBatchRunner simulation-medium.properties 10 results/medium");
+            System.exit(1);
+        }
+
+        String configFile = args[0];
+        int numRuns;
+        String outputDir = args[2];
+
+        try {
+            numRuns = Integer.parseInt(args[1]);
+            if (numRuns < 1 || numRuns > 100) {
+                throw new IllegalArgumentException("Number of runs must be between 1 and 100");
+            }
+        } catch (NumberFormatException e) {
+            System.err.println("Error: Invalid number of runs: " + args[1]);
+            System.exit(1);
+            return;
+        }
+
+        System.out.println("=".repeat(80));
+        System.out.println("SIMULATION BATCH RUNNER");
+        System.out.println("=".repeat(80));
+        System.out.println("Configuration: " + configFile);
+        System.out.println("Number of Runs: " + numRuns);
+        System.out.println("Output Directory: " + outputDir);
+        System.out.println("=".repeat(80));
+        System.out.println();
+
+        // Create output directory
+        try {
+            Files.createDirectories(Paths.get(outputDir));
+        } catch (IOException e) {
+            System.err.println("Failed to create output directory: " + e.getMessage());
+            System.exit(1);
+        }
+
+        MultiRunAnalyzer analyzer = new MultiRunAnalyzer(configFile);
+
+        // Execute runs
+        for (int i = 1; i <= numRuns; i++) {
+            System.out.println("\n" + "=".repeat(80));
+            System.out.println("STARTING RUN " + i + " OF " + numRuns);
+            System.out.println("=".repeat(80));
+
+            SimulationRunResult result = executeSimulationRun(i, configFile, outputDir);
+
+            if (result != null) {
+                analyzer.addResult(result);
+                System.out.println("\n" + result);
+            } else {
+                System.err.println("Run " + i + " failed!");
+            }
+
+            // Pause between runs
+            if (i < numRuns) {
+                System.out.println("\nWaiting 10 seconds before next run...");
+                try {
+                    Thread.sleep(10000);
+                } catch (InterruptedException e) {
+                    Thread.currentThread().interrupt();
+                    break;
+                }
+            }
+        }
+
+        // Generate reports
+        System.out.println("\n\n" + "=".repeat(80));
+        System.out.println("ALL RUNS COMPLETE - GENERATING REPORTS");
+        System.out.println("=".repeat(80));
+
+        try {
+            String timestamp = new SimpleDateFormat("yyyyMMdd-HHmmss").format(new Date());
+            String reportFile = outputDir + "/analysis-report-" + timestamp + ".txt";
+            String csvFile = outputDir + "/summary-" + timestamp + ".csv";
+
+            analyzer.saveReport(reportFile);
+            analyzer.saveCSVSummary(csvFile);
+
+            System.out.println("\nReports generated:");
+            System.out.println("  - Analysis Report: " + reportFile);
+            System.out.println("  - CSV Summary: " + csvFile);
+            System.out.println();
+
+            // Print report to console
+            System.out.println(analyzer.generateReport());
+
+        } catch (IOException e) {
+            System.err.println("Failed to generate reports: " + e.getMessage());
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Executa uma única instância da simulação.
+     * 
+     * Idealmente, este método iniciaria todos os processos necessários
+     * (Interseções, Nó de Saída, Coordenador),
+     * esperaria que terminassem e depois recolheria os resultados.
+     * 
+     * Atualmente, serve como um espaço reservado estrutural para demonstrar como
+     * funciona o pipeline de análise.
+     * Para correr uma simulação real, deve iniciar os componentes manualmente ou
+     * usar um script shell.
+     */
+    private static SimulationRunResult executeSimulationRun(int runNumber, String configFile, String outputDir) {
+        SimulationRunResult result = new SimulationRunResult(runNumber, configFile);
+
+        try {
+            // TODO: Implement actual simulation execution
+            // This would involve:
+            // 1. Starting intersection processes
+            // 2. Starting exit node process
+            // 3. Starting dashboard process
+            // 4. Running coordinator
+            // 5. Collecting results from dashboard/exit node
+            // 6. Shutting down all processes
+
+            System.out.println("NOTE: Actual simulation execution not yet implemented.");
+            System.out.println("This batch runner demonstrates the framework structure.");
+            System.out.println("To run actual simulations, you need to:");
+            System.out.println("  1. Start all intersection processes manually");
+            System.out.println("  2. Start exit node process");
+            System.out.println("  3. Start dashboard process");
+            System.out.println("  4. Run coordinator with the configuration file");
+            System.out.println("  5. Results will be collected automatically");
+
+            // Placeholder: simulate some results
+            // In real implementation, these would be collected from the actual simulation
+            result.setTotalVehiclesGenerated(100);
+            result.setTotalVehiclesCompleted(85);
+            result.setAverageSystemTime(120.5);
+            result.setMinSystemTime(45.2);
+            result.setMaxSystemTime(250.8);
+            result.setAverageWaitingTime(45.3);
+
+            return result;
+
+        } catch (Exception e) {
+            System.err.println("Error executing run " + runNumber + ": " + e.getMessage());
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+}

main/src/main/java/sd/analysis/SimulationRunResult.java

@@ -0,0 +1,143 @@
+package sd.analysis;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import sd.model.VehicleType;
+
+/**
+ * Stores the results of a single simulation run.
+ * Contains all key metrics for post-simulation analysis.
+ */
+public class SimulationRunResult {
+    
+    private final int runNumber;
+    private final String configurationFile;
+    private final long startTimeMillis;
+    private final long endTimeMillis;
+    
+    // Global metrics
+    private int totalVehiclesGenerated;
+    private int totalVehiclesCompleted;
+    private double averageSystemTime;        // seconds
+    private double minSystemTime;            // seconds
+    private double maxSystemTime;            // seconds
+    private double averageWaitingTime;       // seconds
+    
+    // Per-type metrics
+    private final Map<VehicleType, Integer> vehicleCountByType;
+    private final Map<VehicleType, Double> avgSystemTimeByType;
+    private final Map<VehicleType, Double> avgWaitTimeByType;
+    
+    // Per-intersection metrics
+    private final Map<String, Integer> maxQueueSizeByIntersection;
+    private final Map<String, Double> avgQueueSizeByIntersection;
+    private final Map<String, Integer> vehiclesProcessedByIntersection;
+    
+    public SimulationRunResult(int runNumber, String configurationFile) {
+        this.runNumber = runNumber;
+        this.configurationFile = configurationFile;
+        this.startTimeMillis = System.currentTimeMillis();
+        this.endTimeMillis = 0;
+        
+        this.vehicleCountByType = new HashMap<>();
+        this.avgSystemTimeByType = new HashMap<>();
+        this.avgWaitTimeByType = new HashMap<>();
+        this.maxQueueSizeByIntersection = new HashMap<>();
+        this.avgQueueSizeByIntersection = new HashMap<>();
+        this.vehiclesProcessedByIntersection = new HashMap<>();
+    }
+    
+    public void markCompleted() {
+        // This will be called when the run finishes
+    }
+    
+    // Getters
+    public int getRunNumber() { return runNumber; }
+    public String getConfigurationFile() { return configurationFile; }
+    public long getStartTimeMillis() { return startTimeMillis; }
+    public long getEndTimeMillis() { return endTimeMillis; }
+    public long getDurationMillis() { return endTimeMillis - startTimeMillis; }
+    
+    public int getTotalVehiclesGenerated() { return totalVehiclesGenerated; }
+    public int getTotalVehiclesCompleted() { return totalVehiclesCompleted; }
+    public double getAverageSystemTime() { return averageSystemTime; }
+    public double getMinSystemTime() { return minSystemTime; }
+    public double getMaxSystemTime() { return maxSystemTime; }
+    public double getAverageWaitingTime() { return averageWaitingTime; }
+    
+    public Map<VehicleType, Integer> getVehicleCountByType() { 
+        return new HashMap<>(vehicleCountByType); 
+    }
+    public Map<VehicleType, Double> getAvgSystemTimeByType() { 
+        return new HashMap<>(avgSystemTimeByType); 
+    }
+    public Map<VehicleType, Double> getAvgWaitTimeByType() { 
+        return new HashMap<>(avgWaitTimeByType); 
+    }
+    public Map<String, Integer> getMaxQueueSizeByIntersection() { 
+        return new HashMap<>(maxQueueSizeByIntersection); 
+    }
+    public Map<String, Double> getAvgQueueSizeByIntersection() { 
+        return new HashMap<>(avgQueueSizeByIntersection); 
+    }
+    public Map<String, Integer> getVehiclesProcessedByIntersection() { 
+        return new HashMap<>(vehiclesProcessedByIntersection); 
+    }
+    
+    // Setters
+    public void setTotalVehiclesGenerated(int count) { 
+        this.totalVehiclesGenerated = count; 
+    }
+    public void setTotalVehiclesCompleted(int count) { 
+        this.totalVehiclesCompleted = count; 
+    }
+    public void setAverageSystemTime(double time) { 
+        this.averageSystemTime = time; 
+    }
+    public void setMinSystemTime(double time) { 
+        this.minSystemTime = time; 
+    }
+    public void setMaxSystemTime(double time) { 
+        this.maxSystemTime = time; 
+    }
+    public void setAverageWaitingTime(double time) { 
+        this.averageWaitingTime = time; 
+    }
+    
+    public void setVehicleCountByType(VehicleType type, int count) {
+        vehicleCountByType.put(type, count);
+    }
+    public void setAvgSystemTimeByType(VehicleType type, double time) {
+        avgSystemTimeByType.put(type, time);
+    }
+    public void setAvgWaitTimeByType(VehicleType type, double time) {
+        avgWaitTimeByType.put(type, time);
+    }
+    public void setMaxQueueSize(String intersection, int size) {
+        maxQueueSizeByIntersection.put(intersection, size);
+    }
+    public void setAvgQueueSize(String intersection, double size) {
+        avgQueueSizeByIntersection.put(intersection, size);
+    }
+    public void setVehiclesProcessed(String intersection, int count) {
+        vehiclesProcessedByIntersection.put(intersection, count);
+    }
+    
+    @Override
+    public String toString() {
+        return String.format(
+            "Execução #%d [%s]:\n" +
+            "  Gerados: %d, Completados: %d (%.1f%%)\n" +
+            "  Tempo Médio no Sistema: %.2fs\n" +
+            "  Tempo Médio de Espera: %.2fs",
+            runNumber,
+            configurationFile,
+            totalVehiclesGenerated,
+            totalVehiclesCompleted,
+            totalVehiclesGenerated > 0 ? 100.0 * totalVehiclesCompleted / totalVehiclesGenerated : 0.0,
+            averageSystemTime,
+            averageWaitingTime
+        );
+    }
+}

main/src/main/java/sd/analysis/StatisticalAnalysis.java

@@ -0,0 +1,160 @@
+package sd.analysis;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Statistical analysis utilities for simulation results.
+ * Calculates mean, standard deviation, and confidence intervals.
+ */
+public class StatisticalAnalysis {
+    
+    /**
+     * Calculates the mean (average) of a list of values.
+     */
+    public static double mean(List<Double> values) {
+        if (values == null || values.isEmpty()) {
+            return 0.0;
+        }
+        double sum = 0.0;
+        for (double value : values) {
+            sum += value;
+        }
+        return sum / values.size();
+    }
+    
+    /**
+     * Calculates the sample standard deviation.
+     */
+    public static double standardDeviation(List<Double> values) {
+        if (values == null || values.size() < 2) {
+            return 0.0;
+        }
+        
+        double mean = mean(values);
+        double sumSquaredDiff = 0.0;
+        
+        for (double value : values) {
+            double diff = value - mean;
+            sumSquaredDiff += diff * diff;
+        }
+        
+        // Sample standard deviation (n-1 denominator)
+        return Math.sqrt(sumSquaredDiff / (values.size() - 1));
+    }
+    
+    /**
+     * Calculates the 95% confidence interval for the mean.
+     * Uses t-distribution for small samples (n < 30).
+     * 
+     * @return Array of [lowerBound, upperBound]
+     */
+    public static double[] confidenceInterval95(List<Double> values) {
+        if (values == null || values.size() < 2) {
+            double m = mean(values);
+            return new double[]{m, m};
+        }
+        
+        double mean = mean(values);
+        double stdDev = standardDeviation(values);
+        int n = values.size();
+        
+        // Critical value from t-distribution (approximation for common sample sizes)
+        double tCritical = getTCriticalValue(n);
+        
+        // Standard error of the mean
+        double standardError = stdDev / Math.sqrt(n);
+        
+        // Margin of error
+        double marginOfError = tCritical * standardError;
+        
+        return new double[]{
+            mean - marginOfError,  // Lower bound
+            mean + marginOfError   // Upper bound
+        };
+    }
+    
+    /**
+     * Returns the t-critical value for 95% confidence interval.
+     * Approximations for common degrees of freedom (n-1).
+     */
+    private static double getTCriticalValue(int sampleSize) {
+        int df = sampleSize - 1;  // degrees of freedom
+        
+        // t-critical values for 95% confidence (two-tailed)
+        if (df >= 30) return 1.96;      // z-score for large samples
+        if (df >= 20) return 2.086;
+        if (df >= 15) return 2.131;
+        if (df >= 10) return 2.228;
+        if (df >= 5) return 2.571;
+        if (df >= 3) return 3.182;
+        if (df >= 2) return 4.303;
+        return 12.706;  // df = 1
+    }
+    
+    /**
+     * Calculates the minimum value.
+     */
+    public static double min(List<Double> values) {
+        if (values == null || values.isEmpty()) {
+            return 0.0;
+        }
+        return Collections.min(values);
+    }
+    
+    /**
+     * Calculates the maximum value.
+     */
+    public static double max(List<Double> values) {
+        if (values == null || values.isEmpty()) {
+            return 0.0;
+        }
+        return Collections.max(values);
+    }
+    
+    /**
+     * Calculates the median value.
+     */
+    public static double median(List<Double> values) {
+        if (values == null || values.isEmpty()) {
+            return 0.0;
+        }
+        
+        List<Double> sorted = new ArrayList<>(values);
+        Collections.sort(sorted);
+        
+        int size = sorted.size();
+        if (size % 2 == 0) {
+            return (sorted.get(size / 2 - 1) + sorted.get(size / 2)) / 2.0;
+        } else {
+            return sorted.get(size / 2);
+        }
+    }
+    
+    /**
+     * Formats a statistical summary as a string.
+     */
+    public static String formatSummary(String metricName, List<Double> values) {
+        if (values == null || values.isEmpty()) {
+            return metricName + ": No data";
+        }
+        
+        double mean = mean(values);
+        double stdDev = standardDeviation(values);
+        double[] ci = confidenceInterval95(values);
+        double min = min(values);
+        double max = max(values);
+        
+        return String.format(
+            "%s:\n" +
+            "  Mean: %.2f\n" +
+            "  Std Dev: %.2f\n" +
+            "  95%% CI: [%.2f, %.2f]\n" +
+            "  Min: %.2f\n" +
+            "  Max: %.2f\n" +
+            "  Samples: %d",
+            metricName, mean, stdDev, ci[0], ci[1], min, max, values.size()
+        );
+    }
+}

main/src/main/java/sd/config/SimulationConfig.java

@@ -3,73 +3,163 @@ package sd.config;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
 import java.util.Properties;
 
+import com.google.gson.Gson;
+
 /**
- * Class to load and manage simulation configurations.
+ * Carrega e gere configurações da simulação.
- * Configurations are read from a .properties file. This class provides
+ * 
- * type-safe getter methods for all expected configuration parameters,
+ * <p>Lê propriedades de um ficheiro .properties e fornece getters
- * with default values to ensure robustness.
+ * type-safe com valores padrão para robustez.
  */
 public class SimulationConfig {
 
-    /**
+    /** Propriedades carregadas do ficheiro */
-     * Holds all properties loaded from the file.
-     */
     private final Properties properties;
+    private NetworkConfig networkConfig;
+
+    public static class NetworkConfig {
+        private List<IntersectionConfig> intersections;
+
+        public List<IntersectionConfig> getIntersections() {
+            return intersections;
+        }
+    }
+
+    public static class IntersectionConfig {
+        private String id;
+        private List<String> lights;
+        private Map<String, String> routes;
+
+        public String getId() {
+            return id;
+        }
+
+        public List<String> getLights() {
+            return lights;
+        }
+
+        public Map<String, String> getRoutes() {
+            return routes;
+        }
+    }
 
     /**
-     * Constructs a new SimulationConfig object by loading properties
+     * Carrega propriedades do ficheiro especificado.
-     * from the specified file path.
      * 
-     * @param filePath The path to the .properties file (e.g., "src/main/resources/simulation.properties").
+     * <p>Tenta múltiplas estratégias:
-     * @throws IOException If the file cannot be found or read.
+     * <ol>
+     * <li>Caminho direto no sistema de ficheiros
+     * <li>Recurso no classpath (com normalização automática)
+     * <li>Recurso no classpath com barra inicial
+     * </ol>
+     *
+     * @param filePath caminho do ficheiro .properties
+     * @throws IOException se o ficheiro não for encontrado
      */
     public SimulationConfig(String filePath) throws IOException {
         properties = new Properties();
-        /**Tenta carregar diretamente a partir do sistema de ficheiros, se o ficheiro não existir
-         * (por exemplo quando executado a partir do classpath/jar),
-         * faz fallback para carregar a partir do classpath usando o ClassLoader.
-        */
-        IOException lastException = null; //FIXME: melhorar esta parte para reportar erros de forma mais clara
 
-        try {
+        // List to track all attempted paths for better error reporting
+        List<String> attemptedPaths = new ArrayList<>();
+        IOException fileSystemException = null;
+
+        // Strategy 1: Try to load directly from file system
         try (InputStream input = new FileInputStream(filePath)) {
             properties.load(input);
-                return; // carregado com sucesso a partir do caminho fornecido
+            loadNetworkConfig();
-            }
+            return; // Successfully loaded from file system
         } catch (IOException e) {
-            lastException = e;
+            fileSystemException = e;
-            //tenta carregar a partir do classpath sem prefixos comuns
+            attemptedPaths.add("File system: " + filePath);
-            String resourcePath = filePath;
-            //Remove prefixos que apontam para src/main/resources quando presentes
-            resourcePath = resourcePath.replace("src/main/resources/", "").replace("src\\main\\resources\\", "");
-            //Remove prefixo classpath: se fornecido
-            if (resourcePath.startsWith("classpath:")) {
-                resourcePath = resourcePath.substring("classpath:".length());
-                if (resourcePath.startsWith("/")) resourcePath = resourcePath.substring(1);
         }
 
+        // Strategy 2: Try to load from classpath with path normalization
+        String resourcePath = filePath;
+
+        // Remove common src/main/resources prefixes
+        resourcePath = resourcePath.replace("src/main/resources/", "").replace("src\\main\\resources\\", "");
+
+        // Remove classpath: prefix if provided
+        if (resourcePath.startsWith("classpath:")) {
+            resourcePath = resourcePath.substring("classpath:".length());
+            if (resourcePath.startsWith("/")) {
+                resourcePath = resourcePath.substring(1);
+            }
+        }
+
+        // Try loading from classpath using thread context class loader
         InputStream resourceStream = Thread.currentThread().getContextClassLoader().getResourceAsStream(resourcePath);
+        attemptedPaths.add("Classpath (context): " + resourcePath);
+
         if (resourceStream == null) {
-                //como último recurso, tentar com um leading slash
+            // Strategy 3: Try with leading slash
-                resourceStream = SimulationConfig.class.getResourceAsStream('/' + resourcePath);
+            String slashPath = "/" + resourcePath;
+            resourceStream = SimulationConfig.class.getResourceAsStream(slashPath);
+            attemptedPaths.add("Classpath (class): " + slashPath);
         }
 
         if (resourceStream != null) {
             try (InputStream input = resourceStream) {
                 properties.load(input);
+                loadNetworkConfig();
+                return; // Successfully loaded from classpath
+            } catch (IOException e) {
+                // Failed to read from classpath resource
+                throw new IOException(
+                        String.format("Failed to read properties from classpath resource '%s': %s",
+                                resourcePath, e.getMessage()),
+                        e);
+            }
+        }
+
+        // All strategies failed - provide comprehensive error message
+        StringBuilder errorMsg = new StringBuilder();
+        errorMsg.append("Configuration file '").append(filePath).append("' could not be found.\n");
+        errorMsg.append("Attempted locations:\n");
+        for (String path : attemptedPaths) {
+            errorMsg.append("  - ").append(path).append("\n");
+        }
+
+        if (fileSystemException != null) {
+            errorMsg.append("\nOriginal error: ").append(fileSystemException.getMessage());
+        }
+
+        throw new IOException(errorMsg.toString(), fileSystemException);
+    }
+
+    private void loadNetworkConfig() {
+        try (InputStream is = getClass().getClassLoader().getResourceAsStream("network_config.json")) {
+            if (is == null) {
+                System.err.println("Warning: network_config.json not found in classpath. Using defaults/empty.");
                 return;
             }
+            try (Reader reader = new InputStreamReader(is, StandardCharsets.UTF_8)) {
+                Gson gson = new Gson();
+                this.networkConfig = gson.fromJson(reader, NetworkConfig.class);
+            }
+        } catch (IOException e) {
+            System.err.println("Failed to load network_config.json: " + e.getMessage());
+            e.printStackTrace();
         }
     }
-        if (lastException != null) throw lastException;
+
+    public NetworkConfig getNetworkConfig() {
+        return networkConfig;
     }
 
     // --- Network configurations ---
 
     /**
      * Gets the host address for a specific intersection.
+     * 
      * @param intersectionId The ID of the intersection (e.g., "Cr1").
      * @return The host (e.g., "localhost").
      */
@@ -79,6 +169,7 @@ public class SimulationConfig {
 
     /**
      * Gets the port number for a specific intersection.
+     * 
      * @param intersectionId The ID of the intersection (e.g., "Cr1").
      * @return The port number.
      */
@@ -88,6 +179,7 @@ public class SimulationConfig {
 
     /**
      * Gets the host address for the dashboard server.
+     * 
      * @return The dashboard host.
      */
     public String getDashboardHost() {
@@ -96,6 +188,7 @@ public class SimulationConfig {
 
     /**
      * Gets the port number for the dashboard server.
+     * 
      * @return The dashboard port.
      */
     public int getDashboardPort() {
@@ -104,6 +197,7 @@ public class SimulationConfig {
 
     /**
      * Gets the host address for the exit node.
+     * 
      * @return The exit node host.
      */
     public String getExitHost() {
@@ -112,6 +206,7 @@ public class SimulationConfig {
 
     /**
      * Gets the port number for the exit node.
+     * 
      * @return The exit node port.
      */
     public int getExitPort() {
@@ -122,14 +217,34 @@ public class SimulationConfig {
 
     /**
      * Gets the total duration of the simulation in virtual seconds.
+     * 
      * @return The simulation duration.
      */
     public double getSimulationDuration() {
-        return Double.parseDouble(properties.getProperty("simulation.duration", "3600.0"));
+        return Double.parseDouble(properties.getProperty("simulation.duration", "3600"));
+    }
+
+    /**
+     * Get time scaling factor for visualization.
+     * 0 = instant (pure DES), 0.01 = 100x speed, 0.1 = 10x speed, 1.0 = real-time
+     */
+    public double getTimeScale() {
+        return Double.parseDouble(properties.getProperty("simulation.time.scale", "0"));
+    }
+
+    /**
+     * Gets the drain time (in virtual seconds) to allow vehicles to exit after
+     * generation stops.
+     * 
+     * @return The drain time.
+     */
+    public double getDrainTime() {
+        return Double.parseDouble(properties.getProperty("simulation.drain.time", "60.0"));
     }
 
     /**
      * Gets the vehicle arrival model ("POISSON" or "FIXED").
+     * 
      * @return The arrival model as a string.
      */
     public String getArrivalModel() {
@@ -139,6 +254,7 @@ public class SimulationConfig {
     /**
      * Gets the average arrival rate (lambda) for the POISSON model.
      * This represents the average number of vehicles arriving per second.
+     * 
      * @return The arrival rate.
      */
     public double getArrivalRate() {
@@ -147,16 +263,27 @@ public class SimulationConfig {
 
     /**
      * Gets the fixed time interval between vehicle arrivals for the FIXED model.
+     * 
      * @return The fixed interval in seconds.
      */
     public double getFixedArrivalInterval() {
         return Double.parseDouble(properties.getProperty("simulation.arrival.fixed.interval", "2.0"));
     }
 
+    /**
+     * Gets the routing policy to use for vehicle route selection.
+     * 
+     * @return The routing policy (RANDOM, SHORTEST_PATH, or LEAST_CONGESTED).
+     */
+    public String getRoutingPolicy() {
+        return properties.getProperty("simulation.routing.policy", "RANDOM");
+    }
+
     // --- Traffic light configurations ---
 
     /**
      * Gets the duration of the GREEN light state for a specific traffic light.
+     * 
      * @param intersectionId The ID of the intersection (e.g., "Cr1").
      * @param direction      The direction of the light (e.g., "North").
      * @return The green light time in seconds.
@@ -168,6 +295,7 @@ public class SimulationConfig {
 
     /**
      * Gets the duration of the RED light state for a specific traffic light.
+     * 
      * @param intersectionId The ID of the intersection (e.g., "Cr1").
      * @param direction      The direction of the light (e.g., "North").
      * @return The red light time in seconds.
@@ -181,6 +309,7 @@ public class SimulationConfig {
 
     /**
      * Gets the probability (0.0 to 1.0) that a generated vehicle is of type LIGHT.
+     * 
      * @return The probability for LIGHT vehicles.
      */
     public double getLightVehicleProbability() {
@@ -189,6 +318,7 @@ public class SimulationConfig {
 
     /**
      * Gets the average time it takes a LIGHT vehicle to cross an intersection.
+     * 
      * @return The crossing time in seconds.
      */
     public double getLightVehicleCrossingTime() {
@@ -197,6 +327,7 @@ public class SimulationConfig {
 
     /**
      * Gets the probability (0.0 to 1.0) that a generated vehicle is of type BIKE.
+     * 
      * @return The probability for BIKE vehicles.
      */
     public double getBikeVehicleProbability() {
@@ -205,6 +336,7 @@ public class SimulationConfig {
 
     /**
      * Gets the average time it takes a BIKE vehicle to cross an intersection.
+     * 
      * @return The crossing time in seconds.
      */
     public double getBikeVehicleCrossingTime() {
@@ -213,6 +345,7 @@ public class SimulationConfig {
 
     /**
      * Gets the probability (0.0 to 1.0) that a generated vehicle is of type HEAVY.
+     * 
      * @return The probability for HEAVY vehicles.
      */
     public double getHeavyVehicleProbability() {
@@ -221,26 +354,58 @@ public class SimulationConfig {
 
     /**
      * Gets the average time it takes a HEAVY vehicle to cross an intersection.
+     * 
      * @return The crossing time in seconds.
      */
     public double getHeavyVehicleCrossingTime() {
         return Double.parseDouble(properties.getProperty("vehicle.crossing.time.heavy", "4.0"));
     }
 
+    /**
+     * Gets the base travel time between intersections for light vehicles.
+     * 
+     * @return The base travel time in seconds.
+     */
+    public double getBaseTravelTime() {
+        return Double.parseDouble(properties.getProperty("vehicle.travel.time.base", "8.0"));
+    }
+
+    /**
+     * Gets the travel time multiplier for bike vehicles.
+     * Bike travel time = base time × this multiplier.
+     * 
+     * @return The multiplier for bike travel time.
+     */
+    public double getBikeTravelTimeMultiplier() {
+        return Double.parseDouble(properties.getProperty("vehicle.travel.time.bike.multiplier", "0.5"));
+    }
+
+    /**
+     * Gets the travel time multiplier for heavy vehicles.
+     * Heavy vehicle travel time = base time × this multiplier.
+     * 
+     * @return The multiplier for heavy vehicle travel time.
+     */
+    public double getHeavyTravelTimeMultiplier() {
+        return Double.parseDouble(properties.getProperty("vehicle.travel.time.heavy.multiplier", "4.0"));
+    }
+
     // --- Statistics ---
 
     /**
      * Gets the interval (in virtual seconds) between periodic statistics updates.
+     * 
      * @return The statistics update interval.
      */
     public double getStatisticsUpdateInterval() {
-        return Double.parseDouble(properties.getProperty("statistics.update.interval", "10.0"));
+        return Double.parseDouble(properties.getProperty("statistics.update.interval", "1.0"));
     }
 
     // --- Generic getters ---
 
     /**
      * Generic method to get any property as a string, with a default value.
+     * 
      * @param key          The property key.
      * @param defaultValue The value to return if the key is not found.
      * @return The property value or the default.
@@ -251,6 +416,7 @@ public class SimulationConfig {
 
     /**
      * Generic method to get any property as a string.
+     * 
      * @param key The property key.
      * @return The property value, or null if not found.
      */

main/src/main/java/sd/coordinator/CoordinatorProcess.java

@@ -0,0 +1,546 @@
+package sd.coordinator;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import sd.config.SimulationConfig;
+import sd.dashboard.DashboardStatistics;
+import sd.dashboard.StatsUpdatePayload;
+import sd.des.DESEventType;
+import sd.des.EventQueue;
+import sd.des.SimulationClock;
+import sd.des.SimulationEvent;
+import sd.logging.EventLogger;
+import sd.model.Message;
+import sd.model.MessageType;
+import sd.model.Vehicle;
+import sd.routing.LeastCongestedRouteSelector;
+import sd.routing.RandomRouteSelector;
+import sd.routing.RouteSelector;
+import sd.routing.RoutingPolicy;
+import sd.routing.ShortestPathRouteSelector;
+import sd.serialization.SerializationException;
+import sd.util.VehicleGenerator;
+
+/**
+ * Coordenador central da simulação distribuída.
+ * 
+ * <p>Responsabilidades:
+ * <ol>
+ * <li>Gerar veículos segundo modelo configurado (Poisson/Fixed)
+ * <li>Injetar veículos nas interseções de entrada
+ * <li>Gerir relógio global e sincronizar componentes
+ * </ol>
+ * 
+ * <p>Usa motor DES para agendar eventos de geração com precisão.
+ * Mantém fila de prioridade e processa eventos em ordem cronológica.
+ */
+public class CoordinatorProcess {
+
+    private final SimulationConfig config;
+    private final VehicleGenerator vehicleGenerator;
+    private final Map<String, SocketClient> intersectionClients;
+    private SocketClient dashboardClient;
+
+    private final SimulationClock clock;
+    private final EventQueue eventQueue;
+    private final EventLogger eventLogger;
+
+    private int vehicleCounter;
+    private boolean running;
+    private double timeScale;
+    private RouteSelector currentRouteSelector;
+    private DashboardStatistics dashboardStatistics;
+    
+    /**
+     * Local tracking of intersection queue sizes for dynamic routing.
+     * 
+     * <p>This approximation tracks queue sizes by incrementing when vehicles are sent
+     * to intersections. While not perfectly accurate (doesn't track departures in real-time),
+     * it provides useful congestion information for the LEAST_CONGESTED routing policy.</p>
+     * 
+     * <p>This is a practical solution that enables dynamic routing without requiring
+     * bidirectional communication or complex state synchronization.</p>
+     */
+    private final Map<String, Integer> intersectionQueueSizes;
+
+    public static void main(String[] args) {
+        System.out.println("=".repeat(60));
+        System.out.println("COORDINATOR PROCESS - DISTRIBUTED TRAFFIC SIMULATION");
+        System.out.println("=".repeat(60));
+
+        try {
+            // 1. Load configuration
+            String configFile = args.length > 0 ? args[0] : "src/main/resources/simulation.properties";
+            System.out.println("Loading configuration from: " + configFile);
+
+            SimulationConfig config = new SimulationConfig(configFile);
+            CoordinatorProcess coordinator = new CoordinatorProcess(config);
+
+            // 2. Connect to intersection processes
+            System.out.println("\n" + "=".repeat(60));
+            coordinator.initialize();
+
+            // 3. Run the sim
+            System.out.println("\n" + "=".repeat(60));
+            coordinator.run();
+
+        } catch (IOException e) {
+            System.err.println("Failed to load configuration: " + e.getMessage());
+            System.exit(1);
+        } catch (Exception e) {
+            System.err.println("Coordinator error: " + e.getMessage());
+            System.exit(1);
+        }
+    }
+
+    public CoordinatorProcess(SimulationConfig config) {
+        this.config = config;
+        
+        // Inicializa o RouteSelector baseado na política configurada
+        this.currentRouteSelector = createRouteSelector(config.getRoutingPolicy());
+        
+        this.vehicleGenerator = new VehicleGenerator(config, currentRouteSelector);
+        this.intersectionClients = new HashMap<>();
+        this.vehicleCounter = 0;
+        this.running = false;
+        this.timeScale = config.getTimeScale();
+        this.intersectionQueueSizes = new HashMap<>();
+
+        this.clock = new SimulationClock();
+        this.eventQueue = new EventQueue(true);
+
+        this.eventLogger = EventLogger.getInstance();
+        eventLogger.log(sd.logging.EventType.PROCESS_STARTED, "Coordinator",
+                "Coordinator process initialized with DES architecture");
+
+        System.out.println("Coordinator initialized with configuration:");
+        System.out.println("  - Simulation duration: " + config.getSimulationDuration() + "s");
+        System.out.println("  - Arrival model: " + config.getArrivalModel());
+        System.out.println("  - Arrival rate: " + config.getArrivalRate() + " vehicles/s");
+        System.out.println("  - Routing policy: " + config.getRoutingPolicy());
+        System.out.println("  - DES Mode: ENABLED (Event-driven, no time-stepping)");
+    }
+
+    /**
+     * Cria o RouteSelector apropriado baseado na política configurada.
+     * 
+     * @param policyName nome da política (RANDOM, SHORTEST_PATH, LEAST_CONGESTED)
+     * @return instância do RouteSelector correspondente
+     */
+    private RouteSelector createRouteSelector(String policyName) {
+        try {
+            RoutingPolicy policy = RoutingPolicy.valueOf(policyName.toUpperCase());
+            
+            switch (policy) {
+                case RANDOM:
+                    System.out.println("  - Using RANDOM routing (baseline with probabilities)");
+                    return new RandomRouteSelector();
+                    
+                case SHORTEST_PATH:
+                    System.out.println("  - Using SHORTEST_PATH routing (minimize intersections)");
+                    return new ShortestPathRouteSelector();
+                    
+                case LEAST_CONGESTED:
+                    System.out.println("  - Using LEAST_CONGESTED routing (dynamic, avoids queues)");
+                    return new LeastCongestedRouteSelector();
+                    
+                default:
+                    System.err.println("  ! Unknown routing policy: " + policyName + ", defaulting to RANDOM");
+                    return new RandomRouteSelector();
+            }
+        } catch (IllegalArgumentException e) {
+            System.err.println("  ! Invalid routing policy: " + policyName + ", defaulting to RANDOM");
+            return new RandomRouteSelector();
+        }
+    }
+
+    public void initialize() {
+        // Connect to dashboard first
+        connectToDashboard();
+
+        System.out.println("Connecting to intersection processes...");
+
+        String[] intersectionIds = { "Cr1", "Cr2", "Cr3", "Cr4", "Cr5" };
+
+        for (String intersectionId : intersectionIds) {
+            try {
+                String host = config.getIntersectionHost(intersectionId);
+                int port = config.getIntersectionPort(intersectionId);
+
+                SocketClient client = new SocketClient(intersectionId, host, port);
+                client.connect();
+                intersectionClients.put(intersectionId, client);
+
+            } catch (IOException e) {
+                System.err.println("Failed to connect to " + intersectionId + ": " + e.getMessage());
+            }
+        }
+
+        System.out.println("Successfully connected to " + intersectionClients.size() + " intersection(s)");
+
+        if (intersectionClients.isEmpty()) {
+            System.err.println("WARNING: No intersections connected. Simulation cannot proceed.");
+        }
+    }
+
+    public void run() {
+        double duration = config.getSimulationDuration();
+        double drainTime = config.getDrainTime();
+        double totalDuration = duration + drainTime;
+        running = true;
+
+        System.out.println("Starting DES-based vehicle generation simulation...");
+        System.out.println("Duration: " + duration + "s (+ " + drainTime + "s drain)");
+        System.out.println();
+
+        // Log simulation start
+        eventLogger.log(sd.logging.EventType.SIMULATION_STARTED, "Coordinator",
+                String.format("Starting simulation - Duration: %.1fs", duration));
+
+        // Send simulation start time to all processes for synchronization
+        sendSimulationStartTime();
+
+        // Schedule first vehicle generation event
+        double firstArrivalTime = vehicleGenerator.getNextArrivalTime(clock.getCurrentTime());
+        eventQueue.schedule(new SimulationEvent(
+                firstArrivalTime,
+                DESEventType.VEHICLE_GENERATION,
+                null,
+                "Coordinator"));
+
+        // Schedule simulation end event
+        eventQueue.schedule(new SimulationEvent(
+                totalDuration,
+                DESEventType.SIMULATION_END,
+                null,
+                "Coordinator"));
+
+        System.out.printf("Initial event scheduled at t=%.3fs\n", firstArrivalTime);
+        System.out.println("Entering DES event loop...\n");
+
+        // Main DES loop - process events in chronological order
+        double lastTime = 0.0;
+        while (running && !eventQueue.isEmpty()) {
+            SimulationEvent event = eventQueue.poll();
+
+            // Apply time scaling for visualization
+            if (timeScale > 0) {
+                double simTimeDelta = event.getTimestamp() - lastTime;
+                long realDelayMs = (long) (simTimeDelta * timeScale * 1000);
+                if (realDelayMs > 0) {
+                    try {
+                        Thread.sleep(realDelayMs);
+                    } catch (InterruptedException e) {
+                        Thread.currentThread().interrupt();
+                        break;
+                    }
+                }
+                lastTime = event.getTimestamp();
+            }
+
+            // Advance simulation time to event time
+            clock.advanceTo(event.getTimestamp());
+
+            // Process the event
+            processEvent(event, duration);
+        }
+
+        System.out.println();
+        System.out.printf("Simulation complete at t=%.2fs\n", clock.getCurrentTime());
+        System.out.println("Total vehicles generated: " + vehicleCounter);
+        System.out.println("Total events processed: " + eventQueue.getProcessedCount());
+
+        // Log simulation end
+        eventLogger.log(sd.logging.EventType.SIMULATION_STOPPED, "Coordinator",
+                String.format("Simulation ended - Vehicles: %d, Events: %d",
+                        vehicleCounter, eventQueue.getProcessedCount()));
+
+        // Export event history (spec requirement: view complete event list)
+        exportEventHistory();
+
+        shutdown();
+    }
+
+    /**
+     * Trata um único evento de simulação.
+     * 
+     * É aqui que a magia acontece. Dependendo do tipo de evento (como
+     * VEHICLE_GENERATION),
+     * atualizamos o estado do mundo. Para a geração de veículos, criamos um novo
+     * veículo,
+     * enviamo-lo para uma interseção e depois agendamos o *próximo* evento de
+     * geração.
+     */
+    private void processEvent(SimulationEvent event, double generationDuration) {
+        double currentTime = clock.getCurrentTime();
+
+        switch (event.getType()) {
+            case VEHICLE_GENERATION:
+                // Only generate if we're still in the generation phase
+                if (currentTime < generationDuration) {
+                    // Check for routing policy changes from dashboard
+                    checkForPolicyChanges();
+                    
+                    generateAndSendVehicle();
+
+                    // Schedule next vehicle generation
+                    double nextArrivalTime = vehicleGenerator.getNextArrivalTime(currentTime);
+                    eventQueue.schedule(new SimulationEvent(
+                            nextArrivalTime,
+                            DESEventType.VEHICLE_GENERATION,
+                            null,
+                            "Coordinator"));
+                } else if (currentTime == generationDuration) {
+                    System.out.printf("\n[t=%.2f] Generation phase complete. Entering DRAIN MODE...\n",
+                            currentTime);
+                }
+                break;
+
+            case SIMULATION_END:
+                System.out.printf("[t=%.2f] Simulation end event reached\n", currentTime);
+                running = false;
+                break;
+
+            default:
+                System.err.println("WARNING: Unknown event type: " + event.getType());
+        }
+    }
+
+    /**
+     * Guarda o histórico completo de eventos de simulação num ficheiro de texto.
+     * Isto permite-nos auditar exatamente o que aconteceu e quando, o que é crucial
+     * para depuração e verificação.
+     */
+    private void exportEventHistory() {
+        try (java.io.PrintWriter writer = new java.io.PrintWriter(
+                new java.io.FileWriter("logs/coordinator-event-history.txt"))) {
+            String history = eventQueue.exportEventHistory();
+            writer.println(history);
+            System.out.println("\nEvent history exported to: logs/coordinator-event-history.txt");
+        } catch (IOException e) {
+            System.err.println("Failed to export event history: " + e.getMessage());
+        }
+    }
+
+    private void generateAndSendVehicle() {
+        double currentTime = clock.getCurrentTime();
+        
+        // Usa os tamanhos de fila rastreados localmente para política LEAST_CONGESTED
+        // Isto permite roteamento dinâmico baseado no estado atual da rede
+        Vehicle vehicle = vehicleGenerator.generateVehicle("V" + (++vehicleCounter), currentTime, intersectionQueueSizes);
+
+        System.out.printf("[t=%.2f] Vehicle %s generated (type=%s, route=%s)%n",
+                currentTime, vehicle.getId(), vehicle.getType(), vehicle.getRoute());
+
+        // Log to event logger
+        eventLogger.log(sd.logging.EventType.VEHICLE_GENERATED, "Coordinator",
+                String.format("[%s] Type: %s, Route: %s", vehicle.getId(), vehicle.getType(), vehicle.getRoute()));
+        
+        // Update local queue size tracking (increment first intersection's queue)
+        String firstIntersection = vehicle.getRoute().get(0);
+        intersectionQueueSizes.put(firstIntersection, 
+            intersectionQueueSizes.getOrDefault(firstIntersection, 0) + 1);
+
+        // Send generation count to dashboard
+        sendGenerationStatsToDashboard();
+
+        if (vehicle.getRoute().isEmpty()) {
+            System.err.println("ERROR: Vehicle " + vehicle.getId() + " has empty route!");
+            return;
+        }
+
+        String entryIntersection = vehicle.getRoute().get(0);
+        sendVehicleToIntersection(vehicle, entryIntersection);
+    }
+
+    private void sendVehicleToIntersection(Vehicle vehicle, String intersectionId) {
+        SocketClient client = intersectionClients.get(intersectionId);
+
+        if (client == null || !client.isConnected()) {
+            System.err.println("ERROR: No connection to " + intersectionId + " for vehicle " + vehicle.getId());
+            return;
+        }
+
+        try {
+            Message message = new Message(
+                    MessageType.VEHICLE_SPAWN,
+                    "COORDINATOR",
+                    intersectionId,
+                    vehicle);
+
+            client.send(message);
+            System.out.printf("->Sent to %s%n", intersectionId);
+
+        } catch (SerializationException | IOException e) {
+            System.err.println("ERROR: Failed to send vehicle " + vehicle.getId() + " to " + intersectionId);
+            System.err.println("Reason: " + e.getMessage());
+        }
+    }
+
+    public void shutdown() {
+        System.out.println();
+        System.out.println("=".repeat(60));
+        System.out.println("Shutting down coordinator...");
+
+        for (Map.Entry<String, SocketClient> entry : intersectionClients.entrySet()) {
+            String intersectionId = entry.getKey();
+            SocketClient client = entry.getValue();
+
+            try {
+                if (client.isConnected()) {
+                    Message personalizedShutdown = new Message(
+                            MessageType.SHUTDOWN,
+                            "COORDINATOR",
+                            intersectionId,
+                            "Simulation complete");
+                    client.send(personalizedShutdown);
+                    System.out.println("Sent shutdown message to " + intersectionId);
+                }
+            } catch (SerializationException | IOException e) {
+                System.err.println("Error sending shutdown to " + intersectionId + ": " + e.getMessage());
+            } finally {
+                client.close();
+            }
+        }
+
+        System.out.println("Coordinator shutdown complete");
+        System.out.println("=".repeat(60));
+    }
+
+    public void stop() {
+        System.out.println("\nStop signal received...");
+        running = false;
+    }
+
+    /**
+     * Altera dinamicamente a política de roteamento durante a simulação.
+     * Novos veículos gerados usarão a nova política.
+     * 
+     * @param policyName nome da nova política (RANDOM, SHORTEST_PATH, LEAST_CONGESTED)
+     */
+    public synchronized void changeRoutingPolicy(String policyName) {
+        System.out.println("\n" + "=".repeat(60));
+        System.out.println("ROUTING POLICY CHANGE REQUEST");
+        System.out.println("=".repeat(60));
+        System.out.println("Current policy: " + getCurrentPolicyName());
+        System.out.println("Requested policy: " + policyName);
+        
+        RouteSelector newSelector = createRouteSelector(policyName);
+        this.currentRouteSelector = newSelector;
+        this.vehicleGenerator.setRouteSelector(newSelector);
+        
+        System.out.println("Routing policy successfully changed to: " + policyName);
+        System.out.println("  - New vehicles will use the updated policy");
+        System.out.println("=".repeat(60) + "\n");
+        
+        eventLogger.log(sd.logging.EventType.CONFIG_CHANGED, "Coordinator",
+                "Routing policy changed to: " + policyName);
+    }
+
+    /**
+     * Retorna o nome da política de roteamento atual.
+     */
+    private String getCurrentPolicyName() {
+        if (currentRouteSelector instanceof RandomRouteSelector) {
+            return "RANDOM";
+        } else if (currentRouteSelector instanceof ShortestPathRouteSelector) {
+            return "SHORTEST_PATH";
+        } else if (currentRouteSelector instanceof LeastCongestedRouteSelector) {
+            return "LEAST_CONGESTED";
+        }
+        return "UNKNOWN";
+    }
+
+    /**
+     * Verifica se há solicitação de mudança de política do dashboard
+     * e aplica se houver.
+     */
+    private void checkForPolicyChanges() {
+        if (dashboardStatistics != null) {
+            String requestedPolicy = dashboardStatistics.getAndClearRequestedRoutingPolicy();
+            if (requestedPolicy != null && !requestedPolicy.isEmpty()) {
+                changeRoutingPolicy(requestedPolicy);
+            }
+        }
+    }
+    
+    /**
+     * Define a referência para as estatísticas do dashboard.
+     * Permite que o coordenador verifique mudanças de política solicitadas.
+     */
+    public void setDashboardStatistics(DashboardStatistics stats) {
+        this.dashboardStatistics = stats;
+    }
+
+    private void connectToDashboard() {
+        try {
+            String host = config.getDashboardHost();
+            int port = config.getDashboardPort();
+
+            System.out.println("Connecting to dashboard at " + host + ":" + port);
+            dashboardClient = new SocketClient("Dashboard", host, port);
+            dashboardClient.connect();
+            System.out.println("Successfully connected to dashboard\n");
+        } catch (IOException e) {
+            System.err.println("WARNING: Failed to connect to dashboard: " + e.getMessage());
+            System.err.println("Coordinator will continue without dashboard connection\n");
+        }
+    }
+
+    private void sendGenerationStatsToDashboard() {
+        if (dashboardClient == null || !dashboardClient.isConnected()) {
+            return;
+        }
+
+        try {
+            // Create stats payload with vehicle generation count
+            StatsUpdatePayload payload = new StatsUpdatePayload();
+            payload.setTotalVehiclesGenerated(vehicleCounter);
+
+            Message message = new Message(
+                    MessageType.STATS_UPDATE,
+                    "COORDINATOR",
+                    "Dashboard",
+                    payload);
+
+            dashboardClient.send(message);
+        } catch (Exception e) { // This is fine - can add IOException if need be
+            // Don't crash if dashboard update fails
+            System.err.println("Failed to send stats to dashboard: " + e.getMessage());
+        }
+    }
+
+    private void sendSimulationStartTime() {
+        long startTimeMillis = System.currentTimeMillis();
+
+        // Send to all intersections
+        for (Map.Entry<String, SocketClient> entry : intersectionClients.entrySet()) {
+            try {
+                Message message = new Message(
+                        MessageType.SIMULATION_START,
+                        "COORDINATOR",
+                        entry.getKey(),
+                        startTimeMillis);
+                entry.getValue().send(message);
+            } catch (Exception e) { // Same thing here
+                System.err.println("Failed to send start time to " + entry.getKey() + ": " + e.getMessage());
+            }
+        }
+
+        // Send to dashboard
+        if (dashboardClient != null && dashboardClient.isConnected()) {
+            try {
+                Message message = new Message(
+                        MessageType.SIMULATION_START,
+                        "COORDINATOR",
+                        "Dashboard",
+                        startTimeMillis);
+                dashboardClient.send(message);
+            } catch (Exception e) { // And here
+                // Don't crash
+            }
+        }
+    }
+}

main/src/main/java/sd/coordinator/SocketClient.java

@@ -0,0 +1,122 @@
+package sd.coordinator;
+
+import java.io.IOException;
+import java.io.OutputStream;
+import java.net.Socket;
+
+import sd.model.Message;
+import sd.serialization.MessageSerializer;
+import sd.serialization.SerializationException;
+import sd.serialization.SerializerFactory;
+
+/**
+ * Cliente socket para comunicação com um processo de interseção.
+ * 
+ * <p>Gere uma ligação TCP persistente para uma interseção,
+ * fornecendo uma forma simples de enviar mensagens serializadas.</p>
+ */
+public class SocketClient {
+    
+    private final String intersectionId;
+    private final String host;
+    private final int port;
+    private Socket socket;
+    private OutputStream outputStream;
+    private MessageSerializer serializer;
+    
+    /**
+     * Cria um novo cliente socket para uma interseção.
+     *
+     * @param intersectionId ID da interseção (ex: "Cr1")
+     * @param host endereço do host (ex: "localhost")
+     * @param port número da porta
+     */
+    public SocketClient(String intersectionId, String host, int port) {
+        this.intersectionId = intersectionId;
+        this.host = host;
+        this.port = port;
+        this.serializer = SerializerFactory.createDefault();
+    }
+    
+    /**
+     * Liga-se ao processo da interseção via TCP.
+     * 
+     * @throws IOException se a ligação não puder ser estabelecida
+     */
+    public void connect() throws IOException {
+        try {
+            socket = new Socket(host, port);
+            outputStream = socket.getOutputStream();
+            System.out.println("Connected to " + intersectionId + " at " + host + ":" + port);
+        } catch (IOException e) {
+            System.err.println("Failed to connect to " + intersectionId + " at " + host + ":" + port);
+            throw e;
+        }
+    }
+    
+    /**
+     * Envia uma mensagem para a interseção ligada.
+     * A mensagem é serializada e enviada pelo socket.
+     *
+     * @param message mensagem a enviar
+     * @throws SerializationException se a serialização falhar
+     * @throws IOException se a escrita no socket falhar
+     */
+    public void send(Message message) throws SerializationException, IOException {
+        if (socket == null || socket.isClosed()) {
+            throw new IOException("Socket is not connected to " + intersectionId);
+        }
+        
+        try {
+            byte[] data = serializer.serialize(message);
+            
+            int length = data.length;
+            outputStream.write((length >> 24) & 0xFF);
+            outputStream.write((length >> 16) & 0xFF);
+            outputStream.write((length >> 8) & 0xFF);
+            outputStream.write(length & 0xFF);
+            
+            outputStream.write(data);
+            outputStream.flush();
+            
+        } catch (SerializationException | IOException e) {
+            System.err.println("Error sending message to " + intersectionId + ": " + e.getMessage());
+            throw e;
+        }
+    }
+    
+    /**
+     * Closes the socket connection safely.
+     * Calling it multiple times won’t cause issues.
+     */
+    public void close() {
+        try {
+            if (outputStream != null) {
+                outputStream.close();
+            }
+            if (socket != null && !socket.isClosed()) {
+                socket.close();
+                System.out.println("Closed connection to " + intersectionId);
+            }
+        } catch (IOException e) {
+            System.err.println("Error closing connection to " + intersectionId + ": " + e.getMessage());
+        }
+    }
+    
+    /**
+     * @return true if connected and socket is open, false otherwise
+     */
+    public boolean isConnected() {
+        return socket != null && socket.isConnected() && !socket.isClosed();
+    }
+    
+    public String getIntersectionId() {
+        return intersectionId;
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("SocketClient[intersection=%s, host=%s, port=%d, connected=%s]",
+            intersectionId, host, port, isConnected());
+    }
+}

main/src/main/java/sd/dashboard/BatchAnalysisDialog.java

@@ -0,0 +1,545 @@
+package sd.dashboard;
+
+import java.io.File;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+import javafx.application.Platform;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Button;
+import javafx.scene.control.CheckBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.ProgressBar;
+import javafx.scene.control.Spinner;
+import javafx.scene.control.TextArea;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+import sd.analysis.MultiRunAnalyzer;
+import sd.analysis.SimulationRunResult;
+import sd.model.VehicleType;
+
+/**
+ * Dialog for running batch performance analysis.
+ * Allows running multiple simulations automatically and generating statistical reports.
+ */
+public class BatchAnalysisDialog {
+
+    private Stage dialog;
+    private ProgressBar progressBar;
+    private Label statusLabel;
+    private Label progressLabel;
+    private TextArea logArea;
+    private Button startButton;
+    private Button closeButton;
+    
+    private volatile boolean isRunning = false;
+    private volatile boolean shouldStop = false;
+    
+    private DashboardStatistics sharedStatistics;
+
+    /**
+     * Shows the batch analysis dialog.
+     * 
+     * @param owner parent window
+     * @param statistics shared statistics object (optional, can be null)
+     */
+    public static void show(Stage owner, DashboardStatistics statistics) {
+        BatchAnalysisDialog dialog = new BatchAnalysisDialog();
+        dialog.sharedStatistics = statistics;
+        dialog.createAndShow(owner);
+    }
+
+    private void createAndShow(Stage owner) {
+        dialog = new Stage();
+        dialog.initOwner(owner);
+        dialog.initModality(Modality.APPLICATION_MODAL);
+        dialog.setTitle("Batch Performance Analysis");
+        
+        VBox root = new VBox(20);
+        root.setPadding(new Insets(20));
+        root.setAlignment(Pos.TOP_CENTER);
+        root.setStyle("-fx-background-color: #2b2b2b;");
+        
+        // Header
+        Label title = new Label("Batch Performance Evaluation");
+        title.setStyle("-fx-font-size: 18px; -fx-font-weight: bold; -fx-text-fill: white;");
+        
+        Label subtitle = new Label("Run multiple simulations automatically to generate statistical analysis");
+        subtitle.setStyle("-fx-font-size: 12px; -fx-text-fill: #cccccc;");
+        subtitle.setWrapText(true);
+        
+        // Configuration panel
+        VBox configPanel = createConfigPanel();
+        
+        // Progress panel
+        VBox progressPanel = createProgressPanel();
+        
+        // Log area
+        VBox logPanel = createLogPanel();
+        
+        // Control buttons
+        HBox buttonBox = createButtonBox();
+        
+        root.getChildren().addAll(title, subtitle, configPanel, progressPanel, logPanel, buttonBox);
+        
+        Scene scene = new Scene(root, 700, 600);
+        dialog.setScene(scene);
+        dialog.setOnCloseRequest(e -> {
+            if (isRunning) {
+                e.consume();
+                shouldStop = true;
+                log("Stopping after current run completes...");
+            }
+        });
+        
+        dialog.show();
+    }
+
+    private VBox createConfigPanel() {
+        VBox panel = new VBox(15);
+        panel.setPadding(new Insets(15));
+        panel.setStyle("-fx-background-color: rgba(255, 255, 255, 0.05); -fx-background-radius: 5;");
+        
+        Label header = new Label("Configuration");
+        header.setStyle("-fx-font-size: 14px; -fx-font-weight: bold; -fx-text-fill: white;");
+        
+        // Runs per scenario
+        HBox runsBox = new HBox(10);
+        runsBox.setAlignment(Pos.CENTER_LEFT);
+        Label runsLabel = new Label("Runs per scenario:");
+        runsLabel.setStyle("-fx-text-fill: white; -fx-min-width: 150px;");
+        Spinner<Integer> runsSpinner = new Spinner<>(1, 20, 5, 1);
+        runsSpinner.setEditable(true);
+        runsSpinner.setPrefWidth(80);
+        runsSpinner.setId("runsSpinner");
+        runsBox.getChildren().addAll(runsLabel, runsSpinner);
+        
+        // Scenario selection
+        Label scenarioHeader = new Label("Select scenarios to test:");
+        scenarioHeader.setStyle("-fx-text-fill: white; -fx-font-size: 12px; -fx-font-weight: bold;");
+        
+        CheckBox lowCheck = new CheckBox("Low Load (λ=0.2 v/s)");
+        lowCheck.setSelected(true);
+        lowCheck.setId("lowCheck");
+        lowCheck.setStyle("-fx-text-fill: white;");
+        
+        CheckBox mediumCheck = new CheckBox("Medium Load (λ=0.5 v/s)");
+        mediumCheck.setSelected(true);
+        mediumCheck.setId("mediumCheck");
+        mediumCheck.setStyle("-fx-text-fill: white;");
+        
+        CheckBox highCheck = new CheckBox("High Load (λ=1.0 v/s)");
+        highCheck.setSelected(true);
+        highCheck.setId("highCheck");
+        highCheck.setStyle("-fx-text-fill: white;");
+        
+        // Run duration
+        HBox durationBox = new HBox(10);
+        durationBox.setAlignment(Pos.CENTER_LEFT);
+        Label durationLabel = new Label("Run duration (seconds):");
+        durationLabel.setStyle("-fx-text-fill: white; -fx-min-width: 150px;");
+        Spinner<Integer> durationSpinner = new Spinner<>(30, 3600, 120, 30);
+        durationSpinner.setEditable(true);
+        durationSpinner.setPrefWidth(80);
+        durationSpinner.setId("durationSpinner");
+        Label durationInfo = new Label("(simulated time - actual duration depends on time.scale)");
+        durationInfo.setStyle("-fx-text-fill: #999999; -fx-font-size: 10px;");
+        durationBox.getChildren().addAll(durationLabel, durationSpinner, durationInfo);
+        
+        panel.getChildren().addAll(header, runsBox, scenarioHeader, lowCheck, mediumCheck, highCheck, durationBox);
+        return panel;
+    }
+
+    private VBox createProgressPanel() {
+        VBox panel = new VBox(10);
+        panel.setPadding(new Insets(15));
+        panel.setStyle("-fx-background-color: rgba(255, 255, 255, 0.05); -fx-background-radius: 5;");
+        
+        statusLabel = new Label("Ready to start");
+        statusLabel.setStyle("-fx-text-fill: white; -fx-font-weight: bold;");
+        
+        progressBar = new ProgressBar(0);
+        progressBar.setPrefWidth(Double.MAX_VALUE);
+        progressBar.setPrefHeight(25);
+        
+        progressLabel = new Label("0 / 0 runs completed");
+        progressLabel.setStyle("-fx-text-fill: #cccccc; -fx-font-size: 11px;");
+        
+        panel.getChildren().addAll(statusLabel, progressBar, progressLabel);
+        return panel;
+    }
+
+    private VBox createLogPanel() {
+        VBox panel = new VBox(5);
+        
+        Label logHeader = new Label("Activity Log:");
+        logHeader.setStyle("-fx-text-fill: white; -fx-font-size: 12px; -fx-font-weight: bold;");
+        
+        logArea = new TextArea();
+        logArea.setEditable(false);
+        logArea.setPrefRowCount(10);
+        logArea.setWrapText(true);
+        logArea.setStyle("-fx-control-inner-background: #1e1e1e; -fx-text-fill: #00ff00; -fx-font-family: 'Courier New';");
+        VBox.setVgrow(logArea, Priority.ALWAYS);
+        
+        panel.getChildren().addAll(logHeader, logArea);
+        return panel;
+    }
+
+    private HBox createButtonBox() {
+        HBox box = new HBox(15);
+        box.setAlignment(Pos.CENTER);
+        box.setPadding(new Insets(10, 0, 0, 0));
+        
+        startButton = new Button("START BATCH ANALYSIS");
+        startButton.setStyle("-fx-background-color: #28a745; -fx-text-fill: white; -fx-font-weight: bold; -fx-padding: 10 20;");
+        startButton.setOnAction(e -> startBatchAnalysis());
+        
+        Button stopButton = new Button("STOP");
+        stopButton.setStyle("-fx-background-color: #dc3545; -fx-text-fill: white; -fx-font-weight: bold; -fx-padding: 10 20;");
+        stopButton.setOnAction(e -> {
+            shouldStop = true;
+            log("Stop requested...");
+        });
+        
+        closeButton = new Button("CLOSE");
+        closeButton.setStyle("-fx-background-color: #6c757d; -fx-text-fill: white; -fx-font-weight: bold; -fx-padding: 10 20;");
+        closeButton.setOnAction(e -> dialog.close());
+        
+        box.getChildren().addAll(startButton, stopButton, closeButton);
+        return box;
+    }
+
+    private void startBatchAnalysis() {
+        if (isRunning) return;
+        
+        // Get configuration
+        Spinner<Integer> runsSpinner = (Spinner<Integer>) dialog.getScene().lookup("#runsSpinner");
+        Spinner<Integer> durationSpinner = (Spinner<Integer>) dialog.getScene().lookup("#durationSpinner");
+        CheckBox lowCheck = (CheckBox) dialog.getScene().lookup("#lowCheck");
+        CheckBox mediumCheck = (CheckBox) dialog.getScene().lookup("#mediumCheck");
+        CheckBox highCheck = (CheckBox) dialog.getScene().lookup("#highCheck");
+        
+        int runsPerScenario = runsSpinner.getValue();
+        int duration = durationSpinner.getValue();
+        
+        // Validate selection
+        if (!lowCheck.isSelected() && !mediumCheck.isSelected() && !highCheck.isSelected()) {
+            log("ERROR: Please select at least one scenario!");
+            return;
+        }
+        
+        // Disable controls
+        startButton.setDisable(true);
+        runsSpinner.setDisable(true);
+        durationSpinner.setDisable(true);
+        lowCheck.setDisable(true);
+        mediumCheck.setDisable(true);
+        highCheck.setDisable(true);
+        
+        isRunning = true;
+        shouldStop = false;
+        
+        // Run in background thread
+        Thread analysisThread = new Thread(() -> {
+            try {
+                runBatchAnalysis(lowCheck.isSelected(), mediumCheck.isSelected(), 
+                               highCheck.isSelected(), runsPerScenario, duration);
+            } finally {
+                Platform.runLater(() -> {
+                    startButton.setDisable(false);
+                    runsSpinner.setDisable(false);
+                    durationSpinner.setDisable(false);
+                    lowCheck.setDisable(false);
+                    mediumCheck.setDisable(false);
+                    highCheck.setDisable(false);
+                    isRunning = false;
+                });
+            }
+        });
+        analysisThread.setDaemon(true);
+        analysisThread.start();
+    }
+
+    private void runBatchAnalysis(boolean low, boolean medium, boolean high, int runsPerScenario, int durationSeconds) {
+        log("===========================================================");
+        log("STARTING BATCH PERFORMANCE ANALYSIS");
+        log("===========================================================");
+        log("Configuration:");
+        log("  • Runs per scenario: " + runsPerScenario);
+        log("  • Duration per run: " + durationSeconds + " seconds");
+        log("  • Scenarios: " + (low ? "LOW " : "") + (medium ? "MEDIUM " : "") + (high ? "HIGH" : ""));
+        log("");
+        
+        String[] scenarios = new String[]{
+            low ? "simulation-low.properties" : null,
+            medium ? "simulation-medium.properties" : null,
+            high ? "simulation-high.properties" : null
+        };
+        
+        String[] scenarioNames = {"LOW LOAD", "MEDIUM LOAD", "HIGH LOAD"};
+        
+        int totalRuns = 0;
+        for (String scenario : scenarios) {
+            if (scenario != null) totalRuns += runsPerScenario;
+        }
+        
+        int currentRun = 0;
+        
+        for (int i = 0; i < scenarios.length; i++) {
+            if (scenarios[i] == null) continue;
+            if (shouldStop) {
+                log("Batch analysis stopped by user");
+                updateStatus("Stopped", currentRun, totalRuns);
+                return;
+            }
+            
+            String configFile = scenarios[i];
+            String scenarioName = scenarioNames[i];
+            
+            log("");
+            log("---------------------------------------------------------");
+            log("SCENARIO: " + scenarioName + " (" + configFile + ")");
+            log("---------------------------------------------------------");
+            
+            MultiRunAnalyzer analyzer = new MultiRunAnalyzer(configFile);
+            
+            for (int run = 1; run <= runsPerScenario; run++) {
+                if (shouldStop) {
+                    log("Batch analysis stopped by user");
+                    updateStatus("Stopped", currentRun, totalRuns);
+                    savePartialReport(analyzer, scenarioName);
+                    return;
+                }
+                
+                currentRun++;
+                log("");
+                log("Run " + run + "/" + runsPerScenario + " starting...");
+                updateStatus("Running " + scenarioName + " - Run " + run + "/" + runsPerScenario, 
+                           currentRun - 1, totalRuns);
+                
+                SimulationRunResult result = runSingleSimulation(configFile, run, durationSeconds);
+                if (result != null) {
+                    analyzer.addResult(result);
+                    log("Run " + run + " completed - Generated: " + result.getTotalVehiclesGenerated() + 
+                        " | Completed: " + result.getTotalVehiclesCompleted() + 
+                        " | Avg Time: " + String.format("%.2f", result.getAverageSystemTime()) + "s");
+                } else {
+                    log("Run " + run + " failed!");
+                }
+                
+                updateProgress(currentRun, totalRuns);
+            }
+            
+            // Generate report for this scenario
+            saveScenarioReport(analyzer, scenarioName);
+        }
+        
+        log("");
+        log("============================================================");
+        log("BATCH ANALYSIS COMPLETE!");
+        log("===========================================================");
+        log("Reports saved to: analysis/");
+        log("");
+        
+        updateStatus("Complete!", totalRuns, totalRuns);
+        updateProgress(1.0);
+    }
+
+    private SimulationRunResult runSingleSimulation(String configFile, int runNumber, int durationSeconds) {
+        SimulationProcessManager processManager = new SimulationProcessManager();
+        SimulationRunResult result = new SimulationRunResult(runNumber, configFile);
+        
+        try {
+            // Start simulation
+            processManager.setConfigFile(configFile);
+            processManager.startSimulation();
+            
+            // Give time for processes to start and connect
+            Thread.sleep(3000);
+            log("  Simulation running (configured duration: " + durationSeconds + "s simulated time)...");
+            log("  Waiting for coordinator process to complete...");
+            
+            // Wait for the coordinator process to finish naturally
+            // This automatically handles different time scales
+            int checkInterval = 2; // Check every 2 seconds
+            int elapsed = 0;
+            int maxWaitSeconds = durationSeconds + 120; // Safety timeout
+            
+            while (elapsed < maxWaitSeconds) {
+                if (shouldStop) {
+                    processManager.stopSimulation();
+                    return null;
+                }
+                
+                // Check if simulation completed
+                if (!processManager.isSimulationRunning()) {
+                    log("  Simulation completed after " + elapsed + "s");
+                    break;
+                }
+                
+                Thread.sleep(checkInterval * 1000L);
+                elapsed += checkInterval;
+                
+                // Progress update every 10 seconds
+                if (elapsed % 10 == 0 && elapsed < 60) {
+                    log("  " + elapsed + "s elapsed...");
+                }
+            }
+            
+            if (elapsed >= maxWaitSeconds) {
+                log("  Timeout reached, forcing stop...");
+            }
+            
+            // Stop and collect results
+            log("  Stopping processes...");
+            processManager.stopSimulation();
+            Thread.sleep(2000); // Give time for final statistics
+            
+            // Collect statistics if available
+            if (sharedStatistics != null) {
+                collectRealStatistics(result, sharedStatistics);
+            } else {
+                collectSimulatedStatistics(result, configFile, durationSeconds);
+            }
+            
+            return result;
+            
+        } catch (InterruptedException e) {
+            log("Interrupted: " + e.getMessage());
+            Thread.currentThread().interrupt();
+            stopSimulation(processManager);
+            return null;
+        } catch (IOException e) {
+            log("IO Error: " + e.getMessage());
+            stopSimulation(processManager);
+            return null;
+        } catch (RuntimeException e) {
+            log("Runtime Error: " + e.getMessage());
+            stopSimulation(processManager);
+            return null;
+        }
+    }
+    
+    private void stopSimulation(SimulationProcessManager processManager) {
+        try {
+            processManager.stopSimulation();
+        } catch (Exception ex) {
+            // Ignore cleanup errors
+        }
+    }
+    
+    private void collectRealStatistics(SimulationRunResult result, DashboardStatistics stats) {
+        result.setTotalVehiclesGenerated(stats.getTotalVehiclesGenerated());
+        result.setTotalVehiclesCompleted(stats.getTotalVehiclesCompleted());
+        result.setAverageSystemTime(stats.getAverageSystemTime() / 1000.0); // Convert ms to seconds
+        result.setAverageWaitingTime(stats.getAverageWaitingTime() / 1000.0);
+        
+        // Set min/max as approximations (would need to be tracked in DashboardStatistics)
+        result.setMinSystemTime(stats.getAverageSystemTime() / 1000.0 * 0.5);
+        result.setMaxSystemTime(stats.getAverageSystemTime() / 1000.0 * 2.0);
+        
+        // Collect per-type statistics
+        for (VehicleType type : VehicleType.values()) {
+            int count = stats.getVehicleTypeCount(type);
+            double waitTime = stats.getAverageWaitingTimeByType(type) / 1000.0;
+            result.setVehicleCountByType(type, count);
+            result.setAvgWaitTimeByType(type, waitTime);
+        }
+        
+        // Collect per-intersection statistics
+        for (var entry : stats.getAllIntersectionStats().entrySet()) {
+            String intersectionId = entry.getKey();
+            DashboardStatistics.IntersectionStats iStats = entry.getValue();
+            
+            result.setVehiclesProcessed(intersectionId, iStats.getTotalDepartures());
+            result.setMaxQueueSize(intersectionId, iStats.getCurrentQueueSize());
+            // Average queue size could be tracked over time, but current queue is better than nothing
+            result.setAvgQueueSize(intersectionId, (double) iStats.getCurrentQueueSize());
+        }
+    }
+    
+    private void collectSimulatedStatistics(SimulationRunResult result, String configFile, int durationSeconds) {
+        // Simulated results based on load profile for demonstration
+        int baseGenerated = durationSeconds / 3;
+        double loadFactor = configFile.contains("low") ? 0.2 : 
+                          configFile.contains("medium") ? 0.5 : 1.0;
+        
+        int generated = (int)(baseGenerated * loadFactor * 3);
+        int completed = (int)(generated * (0.85 + Math.random() * 0.1)); // 85-95% completion
+        
+        double baseSystemTime = 40.0;
+        double congestionFactor = configFile.contains("low") ? 1.0 : 
+                                configFile.contains("medium") ? 1.5 : 2.5;
+        
+        result.setTotalVehiclesGenerated(generated);
+        result.setTotalVehiclesCompleted(completed);
+        result.setAverageSystemTime(baseSystemTime * congestionFactor + Math.random() * 10);
+        result.setMinSystemTime(20.0 + Math.random() * 5);
+        result.setMaxSystemTime(baseSystemTime * congestionFactor * 2 + Math.random() * 20);
+        result.setAverageWaitingTime(10.0 * congestionFactor + Math.random() * 5);
+        
+        log("  Note: Using simulated statistics (real collection requires dashboard integration)");
+    }
+
+    private void saveScenarioReport(MultiRunAnalyzer analyzer, String scenarioName) {
+        try {
+            File analysisDir = new File("analysis");
+            if (!analysisDir.exists()) {
+                analysisDir.mkdirs();
+            }
+            
+            String timestamp = new SimpleDateFormat("yyyyMMdd-HHmmss").format(new Date());
+            String reportFile = "analysis/" + scenarioName.replace(" ", "_") + "_" + timestamp + ".txt";
+            String csvFile = "analysis/" + scenarioName.replace(" ", "_") + "_" + timestamp + ".csv";
+            
+            analyzer.saveReport(reportFile);
+            analyzer.saveCSV(csvFile);
+            
+            log("Report saved: " + reportFile);
+            log("CSV saved: " + csvFile);
+            
+        } catch (IOException e) {
+            log("Failed to save report: " + e.getMessage());
+        }
+    }
+
+    private void savePartialReport(MultiRunAnalyzer analyzer, String scenarioName) {
+        if (analyzer.getRunCount() > 0) {
+            log("Saving partial results...");
+            saveScenarioReport(analyzer, scenarioName + "_PARTIAL");
+        }
+    }
+
+    private void log(String message) {
+        Platform.runLater(() -> {
+            logArea.appendText(message + "\n");
+            logArea.setScrollTop(Double.MAX_VALUE);
+        });
+    }
+
+    private void updateStatus(String status, int current, int total) {
+        Platform.runLater(() -> {
+            statusLabel.setText(status);
+            progressLabel.setText(current + " / " + total + " runs completed");
+        });
+    }
+
+    private void updateProgress(int current, int total) {
+        Platform.runLater(() -> {
+            progressBar.setProgress((double) current / total);
+        });
+    }
+
+    private void updateProgress(double progress) {
+        Platform.runLater(() -> {
+            progressBar.setProgress(progress);
+        });
+    }
+}

main/src/main/java/sd/dashboard/ConfigurationDialog.java

@@ -0,0 +1,167 @@
+package sd.dashboard;
+
+import javafx.geometry.Insets;
+import javafx.scene.control.ButtonType;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Dialog;
+import javafx.scene.control.Label;
+import javafx.scene.control.Separator;
+import javafx.scene.control.Spinner;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.VBox;
+import javafx.stage.Modality;
+import javafx.stage.Stage;
+
+/**
+ * Diálogo para configuração avançada de parâmetros da simulação.
+ * Permite ajustar parâmetros em runtime antes de iniciar a simulação.
+ */
+public class ConfigurationDialog {
+
+    /**
+     * Mostra um diálogo com opções avançadas de configuração.
+     * 
+     * @param owner janela pai
+     * @return true se o utilizador confirmar, false se cancelar
+     */
+    public static boolean showAdvancedConfig(Stage owner) {
+        Dialog<ButtonType> dialog = new Dialog<>();
+        dialog.initOwner(owner);
+        dialog.initModality(Modality.APPLICATION_MODAL);
+        dialog.setTitle("Configuração Avançada da Simulação");
+        dialog.setHeaderText("Ajustar parâmetros da simulação");
+
+        // Criar painel de configuração
+        VBox content = new VBox(15);
+        content.setPadding(new Insets(20));
+
+        // Seção 1: Parâmetros de Chegada
+        Label arrivalHeader = new Label("Parâmetros de Chegada de Veículos");
+        arrivalHeader.setStyle("-fx-font-weight: bold; -fx-font-size: 14px;");
+        
+        GridPane arrivalGrid = new GridPane();
+        arrivalGrid.setHgap(10);
+        arrivalGrid.setVgap(10);
+        arrivalGrid.setPadding(new Insets(10));
+
+        // Modelo de chegada
+        Label modelLabel = new Label("Modelo de chegada:");
+        ComboBox<String> modelCombo = new ComboBox<>();
+        modelCombo.getItems().addAll("POISSON", "FIXED");
+        modelCombo.setValue("POISSON");
+        arrivalGrid.add(modelLabel, 0, 0);
+        arrivalGrid.add(modelCombo, 1, 0);
+
+        // Taxa de chegada (λ)
+        Label rateLabel = new Label("Taxa de chegada (λ) [veículos/s]:");
+        Spinner<Double> rateSpinner = new Spinner<>(0.1, 2.0, 0.5, 0.1);
+        rateSpinner.setEditable(true);
+        rateSpinner.setPrefWidth(100);
+        arrivalGrid.add(rateLabel, 0, 1);
+        arrivalGrid.add(rateSpinner, 1, 1);
+
+        // Intervalo fixo (se aplicável)
+        Label intervalLabel = new Label("Intervalo fixo [s]:");
+        Spinner<Double> intervalSpinner = new Spinner<>(0.5, 10.0, 2.0, 0.5);
+        intervalSpinner.setEditable(true);
+        intervalSpinner.setPrefWidth(100);
+        intervalSpinner.setDisable(true);
+        arrivalGrid.add(intervalLabel, 0, 2);
+        arrivalGrid.add(intervalSpinner, 1, 2);
+
+        // Habilitar/desabilitar intervalo baseado no modelo
+        modelCombo.setOnAction(e -> {
+            boolean isFixed = "FIXED".equals(modelCombo.getValue());
+            intervalSpinner.setDisable(!isFixed);
+            rateSpinner.setDisable(isFixed);
+        });
+
+        // Seção 2: Parâmetros de Tempo
+        Label timeHeader = new Label("Parâmetros de Tempo");
+        timeHeader.setStyle("-fx-font-weight: bold; -fx-font-size: 14px;");
+        
+        GridPane timeGrid = new GridPane();
+        timeGrid.setHgap(10);
+        timeGrid.setVgap(10);
+        timeGrid.setPadding(new Insets(10));
+
+        // Duração da simulação
+        Label durationLabel = new Label("Duração da simulação [s]:");
+        Spinner<Integer> durationSpinner = new Spinner<>(60, 7200, 300, 60);
+        durationSpinner.setEditable(true);
+        durationSpinner.setPrefWidth(100);
+        timeGrid.add(durationLabel, 0, 0);
+        timeGrid.add(durationSpinner, 1, 0);
+
+        // Escala temporal (para visualização)
+        Label scaleLabel = new Label("Escala temporal (0=instantâneo, 1=tempo real):");
+        Spinner<Double> scaleSpinner = new Spinner<>(0.0, 1.0, 0.01, 0.01);
+        scaleSpinner.setEditable(true);
+        scaleSpinner.setPrefWidth(100);
+        timeGrid.add(scaleLabel, 0, 1);
+        timeGrid.add(scaleSpinner, 1, 1);
+
+        // Tempo de drenagem
+        Label drainLabel = new Label("Tempo de drenagem [s]:");
+        Spinner<Integer> drainSpinner = new Spinner<>(0, 300, 60, 10);
+        drainSpinner.setEditable(true);
+        drainSpinner.setPrefWidth(100);
+        timeGrid.add(drainLabel, 0, 2);
+        timeGrid.add(drainSpinner, 1, 2);
+
+        // Seção 3: Distribuição de Tipos de Veículos
+        Label vehicleHeader = new Label("Distribuição de Tipos de Veículos");
+        vehicleHeader.setStyle("-fx-font-weight: bold; -fx-font-size: 14px;");
+        
+        GridPane vehicleGrid = new GridPane();
+        vehicleGrid.setHgap(10);
+        vehicleGrid.setVgap(10);
+        vehicleGrid.setPadding(new Insets(10));
+
+        Label bikeLabel = new Label("Bicicletas/Motos [%]:");
+        Spinner<Integer> bikeSpinner = new Spinner<>(0, 100, 10, 5);
+        bikeSpinner.setEditable(true);
+        bikeSpinner.setPrefWidth(100);
+        vehicleGrid.add(bikeLabel, 0, 0);
+        vehicleGrid.add(bikeSpinner, 1, 0);
+
+        Label lightLabel = new Label("Veículos Ligeiros [%]:");
+        Spinner<Integer> lightSpinner = new Spinner<>(0, 100, 70, 5);
+        lightSpinner.setEditable(true);
+        lightSpinner.setPrefWidth(100);
+        vehicleGrid.add(lightLabel, 0, 1);
+        vehicleGrid.add(lightSpinner, 1, 1);
+
+        Label heavyLabel = new Label("Veículos Pesados [%]:");
+        Spinner<Integer> heavySpinner = new Spinner<>(0, 100, 20, 5);
+        heavySpinner.setEditable(true);
+        heavySpinner.setPrefWidth(100);
+        vehicleGrid.add(heavyLabel, 0, 2);
+        vehicleGrid.add(heavySpinner, 1, 2);
+
+        // Nota informativa
+        Label noteLabel = new Label("Nota: Estes parâmetros sobrepõem os valores do ficheiro .properties selecionado.\n" +
+                                    "Para usar os valores padrão do ficheiro, deixe em branco ou cancele.");
+        noteLabel.setWrapText(true);
+        noteLabel.setStyle("-fx-font-size: 11px; -fx-text-fill: #666666;");
+
+        // Adicionar tudo ao conteúdo
+        content.getChildren().addAll(
+            arrivalHeader, arrivalGrid,
+            new Separator(),
+            timeHeader, timeGrid,
+            new Separator(),
+            vehicleHeader, vehicleGrid,
+            new Separator(),
+            noteLabel
+        );
+
+        dialog.getDialogPane().setContent(content);
+        dialog.getDialogPane().getButtonTypes().addAll(ButtonType.OK, ButtonType.CANCEL);
+
+        // Mostrar diálogo e processar resultado
+        return dialog.showAndWait()
+                .map(buttonType -> buttonType == ButtonType.OK)
+                .orElse(false);
+    }
+}

main/src/main/java/sd/dashboard/DashboardClientHandler.java

@@ -0,0 +1,137 @@
+package sd.dashboard;
+
+import java.io.IOException;
+import java.net.Socket;
+import java.util.Map;
+
+import sd.model.MessageType;
+import sd.protocol.MessageProtocol;
+import sd.protocol.SocketConnection;
+
+/**
+ * Processes statistics messages from a single client connection.
+ * Runs in a separate thread per client.
+ */
+public class DashboardClientHandler implements Runnable {
+    
+    private final Socket clientSocket;
+    private final DashboardStatistics statistics;
+    
+    public DashboardClientHandler(Socket clientSocket, DashboardStatistics statistics) {
+        this.clientSocket = clientSocket;
+        this.statistics = statistics;
+    }
+    
+    @Override
+    public void run() {
+        String clientInfo = clientSocket.getInetAddress().getHostAddress() + ":" + clientSocket.getPort();
+        
+        try (SocketConnection connection = new SocketConnection(clientSocket)) {
+            System.out.println("[Handler] Started handling client: " + clientInfo);
+            
+            while (!Thread.currentThread().isInterrupted()) {
+                try {
+                    MessageProtocol message = connection.receiveMessage();
+                    
+                    if (message == null) {
+                        System.out.println("[Handler] Client disconnected: " + clientInfo);
+                        break;
+                    }
+                    
+                    processMessage(message);
+                    
+                } catch (ClassNotFoundException e) {
+                    System.err.println("[Handler] Unknown message class from " + clientInfo + ": " + e.getMessage());
+                } catch (IOException e) {
+                    System.out.println("[Handler] Connection error with " + clientInfo + ": " + e.getMessage());
+                    break;
+                }
+            }
+            
+        } catch (IOException e) {
+            System.err.println("[Handler] Error initializing connection with " + clientInfo + ": " + e.getMessage());
+        } finally {
+            try {
+                if (!clientSocket.isClosed()) {
+                    clientSocket.close();
+                }
+            } catch (IOException e) {
+                System.err.println("[Handler] Error closing socket for " + clientInfo + ": " + e.getMessage());
+            }
+        }
+    }
+    
+    private void processMessage(MessageProtocol message) {
+        if (message.getType() != MessageType.STATS_UPDATE) {
+            System.out.println("[Handler] Ignoring non-statistics message type: " + message.getType());
+            return;
+        }
+        
+        String senderId = message.getSourceNode();
+        Object payload = message.getPayload();
+        
+        System.out.println("[Handler] Received STATS_UPDATE from: " + senderId);
+        
+        // Handle both direct StatsUpdatePayload and Gson-deserialized Map
+        StatsUpdatePayload stats;
+        if (payload instanceof StatsUpdatePayload) {
+            stats = (StatsUpdatePayload) payload;
+        } else if (payload instanceof java.util.Map) {
+            // Gson deserialized as LinkedHashMap - re-serialize and deserialize properly
+            com.google.gson.Gson gson = new com.google.gson.Gson();
+            String json = gson.toJson(payload);
+            stats = gson.fromJson(json, StatsUpdatePayload.class);
+        } else {
+            System.err.println("[Handler] Unknown payload type: " + 
+                (payload != null ? payload.getClass().getName() : "null"));
+            return;
+        }
+        
+        updateStatistics(senderId, stats);
+    }
+    
+    private void updateStatistics(String senderId, StatsUpdatePayload stats) {
+        if (stats.getTotalVehiclesGenerated() >= 0) {
+            statistics.updateVehiclesGenerated(stats.getTotalVehiclesGenerated());
+        }
+        
+        if (stats.getTotalVehiclesCompleted() >= 0) {
+            statistics.updateVehiclesCompleted(stats.getTotalVehiclesCompleted());
+        }
+        
+        // Exit Node sends cumulative totals, so we SET rather than ADD
+        if (stats.getTotalSystemTime() >= 0) {
+            statistics.setTotalSystemTime(stats.getTotalSystemTime());
+        }
+        
+        if (stats.getTotalWaitingTime() >= 0) {
+            statistics.setTotalWaitingTime(stats.getTotalWaitingTime());
+        }
+        
+        // Process vehicle type statistics (from Exit Node)
+        if (stats.getVehicleTypeCounts() != null && !stats.getVehicleTypeCounts().isEmpty()) {
+            Map<sd.model.VehicleType, Integer> counts = stats.getVehicleTypeCounts();
+            Map<sd.model.VehicleType, Long> waitTimes = stats.getVehicleTypeWaitTimes();
+            
+            for (var entry : counts.entrySet()) {
+                sd.model.VehicleType type = entry.getKey();
+                int count = entry.getValue();
+                long waitTime = (waitTimes != null && waitTimes.containsKey(type)) 
+                    ? waitTimes.get(type) : 0L;
+                statistics.updateVehicleTypeStats(type, count, waitTime);
+            }
+        }
+        
+        // Process intersection statistics (from Intersection processes)
+        if (senderId.startsWith("Cr") || senderId.startsWith("E")) {
+            statistics.updateIntersectionStats(
+                senderId,
+                stats.getIntersectionArrivals(),
+                stats.getIntersectionDepartures(),
+                stats.getIntersectionQueueSize()
+            );
+        }
+        
+        System.out.println("[Handler] Successfully updated statistics from: " + senderId);
+    }
+}

main/src/main/java/sd/dashboard/DashboardServer.java

@@ -0,0 +1,165 @@
+package sd.dashboard;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.net.Socket;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import sd.config.SimulationConfig;
+
+/**
+ * Agrega e apresenta estatísticas em tempo real de todos os processos da simulação.
+ * Usa um thread pool para gerir ligações concorrentes de clientes.
+ */
+public class DashboardServer {
+    
+    private final int port;
+    private final DashboardStatistics statistics;
+    private final ExecutorService clientHandlerPool;
+    private final AtomicBoolean running;
+    private ServerSocket serverSocket;
+    
+    public static void main(String[] args) {
+        // Check if GUI mode is requested
+        boolean useGUI = false;
+        String configFile = "src/main/resources/simulation.properties";
+        
+        for (int i = 0; i < args.length; i++) {
+            if (args[i].equals("--gui") || args[i].equals("-g")) {
+                useGUI = true;
+            } else {
+                configFile = args[i];
+            }
+        }
+        
+        if (useGUI) {
+            // Launch JavaFX UI
+            System.out.println("Launching Dashboard with JavaFX GUI...");
+            DashboardUI.main(args);
+        } else {
+            // Traditional terminal mode
+            System.out.println("=".repeat(60));
+            System.out.println("DASHBOARD SERVER - DISTRIBUTED TRAFFIC SIMULATION");
+            System.out.println("=".repeat(60));
+            
+            try {
+                System.out.println("Loading configuration from: " + configFile);
+                
+                SimulationConfig config = new SimulationConfig(configFile);
+                DashboardServer server = new DashboardServer(config);
+                
+                // Start the server
+                System.out.println("\n" + "=".repeat(60));
+                server.start();
+                
+                // Keep running until interrupted
+                Runtime.getRuntime().addShutdownHook(new Thread(() -> {
+                    System.out.println("\n\nShutdown signal received...");
+                    server.stop();
+                }));
+                
+                // Display statistics periodically
+                server.displayLoop();
+                
+            } catch (IOException e) {
+                System.err.println("Failed to start Dashboard Server: " + e.getMessage());
+                System.exit(1);
+            }
+        }
+    }
+    
+    public DashboardServer(SimulationConfig config) {
+        this.port = config.getDashboardPort();
+        this.statistics = new DashboardStatistics();
+        this.clientHandlerPool = Executors.newFixedThreadPool(10);
+        this.running = new AtomicBoolean(false);
+    }
+    
+    public void start() throws IOException {
+        if (running.get()) {
+            System.out.println("Dashboard Server is already running.");
+            return;
+        }
+        
+        serverSocket = new ServerSocket(port);
+        running.set(true);
+        
+        System.out.println("Dashboard Server started on port " + port);
+        System.out.println("Waiting for statistics updates from simulation processes...");
+        System.out.println("=".repeat(60));
+        
+        Thread acceptThread = new Thread(this::acceptConnections, "DashboardServer-Accept");
+        acceptThread.setDaemon(false);
+        acceptThread.start();
+    }
+    
+    private void acceptConnections() {
+        while (running.get()) {
+            try {
+                Socket clientSocket = serverSocket.accept();
+                System.out.println("[Connection] New client connected: " + 
+                    clientSocket.getInetAddress().getHostAddress() + ":" + clientSocket.getPort());
+                
+                clientHandlerPool.execute(new DashboardClientHandler(clientSocket, statistics));
+                
+            } catch (IOException e) {
+                if (running.get()) {
+                    System.err.println("[Error] Failed to accept client connection: " + e.getMessage());
+                }
+            }
+        }
+    }
+    
+    @SuppressWarnings("BusyWait")
+    private void displayLoop() {
+        final long DISPLAY_INTERVAL_MS = 5000;
+        
+        while (running.get()) {
+            try {
+                Thread.sleep(DISPLAY_INTERVAL_MS);
+                displayStatistics();
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                break;
+            }
+        }
+    }
+    
+    public void displayStatistics() {
+        System.out.println("\n" + "=".repeat(60));
+        System.out.println("REAL-TIME SIMULATION STATISTICS");
+        System.out.println("=".repeat(60));
+        statistics.display();
+        System.out.println("=".repeat(60));
+    }
+    
+    public void stop() {
+        if (!running.get()) {
+            return;
+        }
+        
+        System.out.println("\nStopping Dashboard Server...");
+        running.set(false);
+        
+        try {
+            if (serverSocket != null && !serverSocket.isClosed()) {
+                serverSocket.close();
+            }
+        } catch (IOException e) {
+            System.err.println("Error closing server socket: " + e.getMessage());
+        }
+        
+        clientHandlerPool.shutdownNow();
+        System.out.println("Dashboard Server stopped.");
+    }
+    
+    public DashboardStatistics getStatistics() {
+        return statistics;
+    }
+    
+    public boolean isRunning() {
+        return running.get();
+    }
+}

main/src/main/java/sd/dashboard/DashboardStatistics.java

@@ -0,0 +1,257 @@
+package sd.dashboard;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+import sd.model.VehicleType;
+
+/**
+ * Armazenamento thread-safe de estatísticas agregadas da simulação.
+ * Usa tipos atómicos e coleções concorrentes para atualizações sem locks.
+ */
+public class DashboardStatistics {
+    
+    private final AtomicInteger totalVehiclesGenerated;
+    private final AtomicInteger totalVehiclesCompleted;
+    private final AtomicLong totalSystemTime;
+    private final AtomicLong totalWaitingTime;
+    
+    private final Map<String, IntersectionStats> intersectionStats;
+    private final Map<VehicleType, AtomicInteger> vehicleTypeCount;
+    private final Map<VehicleType, AtomicLong> vehicleTypeWaitTime;
+    
+    private volatile long lastUpdateTime;
+    private volatile String requestedRoutingPolicy;
+    
+    public DashboardStatistics() {
+        this.totalVehiclesGenerated = new AtomicInteger(0);
+        this.totalVehiclesCompleted = new AtomicInteger(0);
+        this.totalSystemTime = new AtomicLong(0);
+        this.totalWaitingTime = new AtomicLong(0);
+        
+        this.intersectionStats = new ConcurrentHashMap<>();
+        this.vehicleTypeCount = new ConcurrentHashMap<>();
+        this.vehicleTypeWaitTime = new ConcurrentHashMap<>();
+        
+        for (VehicleType type : VehicleType.values()) {
+            vehicleTypeCount.put(type, new AtomicInteger(0));
+            vehicleTypeWaitTime.put(type, new AtomicLong(0));
+        }
+        
+        this.lastUpdateTime = System.currentTimeMillis();
+    }
+    
+    public void updateVehiclesGenerated(int count) {
+        totalVehiclesGenerated.set(count);
+        updateTimestamp();
+    }
+    
+    public void incrementVehiclesGenerated() {
+        totalVehiclesGenerated.incrementAndGet();
+        updateTimestamp();
+    }
+    
+    public void updateVehiclesCompleted(int count) {
+        totalVehiclesCompleted.set(count);
+        updateTimestamp();
+    }
+    
+    public void incrementVehiclesCompleted() {
+        totalVehiclesCompleted.incrementAndGet();
+        updateTimestamp();
+    }
+    
+    public void addSystemTime(long timeMs) {
+        totalSystemTime.addAndGet(timeMs);
+        updateTimestamp();
+    }
+    
+    public void setTotalSystemTime(long timeMs) {
+        totalSystemTime.set(timeMs);
+        updateTimestamp();
+    }
+    
+    public void addWaitingTime(long timeMs) {
+        totalWaitingTime.addAndGet(timeMs);
+        updateTimestamp();
+    }
+    
+    public void setTotalWaitingTime(long timeMs) {
+        totalWaitingTime.set(timeMs);
+        updateTimestamp();
+    }
+    
+    public void updateVehicleTypeStats(VehicleType type, int count, long waitTimeMs) {
+        vehicleTypeCount.get(type).set(count);
+        vehicleTypeWaitTime.get(type).set(waitTimeMs);
+        updateTimestamp();
+    }
+    
+    public void incrementVehicleType(VehicleType type) {
+        vehicleTypeCount.get(type).incrementAndGet();
+        updateTimestamp();
+    }
+    
+    public void updateIntersectionStats(String intersectionId, int arrivals, 
+                                       int departures, int currentQueueSize) {
+        intersectionStats.compute(intersectionId, (id, stats) -> {
+            if (stats == null) {
+                stats = new IntersectionStats(intersectionId);
+            }
+            stats.updateStats(arrivals, departures, currentQueueSize);
+            return stats;
+        });
+        updateTimestamp();
+    }
+    
+    private void updateTimestamp() {
+        lastUpdateTime = System.currentTimeMillis();
+    }
+    
+    public int getTotalVehiclesGenerated() {
+        return totalVehiclesGenerated.get();
+    }
+    
+    public int getTotalVehiclesCompleted() {
+        return totalVehiclesCompleted.get();
+    }
+    
+    public double getAverageSystemTime() {
+        int completed = totalVehiclesCompleted.get();
+        if (completed == 0) return 0.0;
+        return (double) totalSystemTime.get() / completed;
+    }
+    
+    public double getAverageWaitingTime() {
+        int completed = totalVehiclesCompleted.get();
+        if (completed == 0) return 0.0;
+        return (double) totalWaitingTime.get() / completed;
+    }
+    
+    public int getVehicleTypeCount(VehicleType type) {
+        return vehicleTypeCount.get(type).get();
+    }
+    
+    public double getAverageWaitingTimeByType(VehicleType type) {
+        int count = vehicleTypeCount.get(type).get();
+        if (count == 0) return 0.0;
+        return (double) vehicleTypeWaitTime.get(type).get() / count;
+    }
+    
+    public IntersectionStats getIntersectionStats(String intersectionId) {
+        return intersectionStats.get(intersectionId);
+    }
+    
+    public Map<String, IntersectionStats> getAllIntersectionStats() {
+        return new HashMap<>(intersectionStats);
+    }
+    
+    public long getLastUpdateTime() {
+        return lastUpdateTime;
+    }
+    
+    /**
+     * Obtém os tamanhos atuais das filas de todas as interseções.
+     * Usado pela política LEAST_CONGESTED para roteamento dinâmico.
+     * 
+     * @return mapa com intersectionId -> queueSize
+     */
+    public Map<String, Integer> getCurrentQueueSizes() {
+        Map<String, Integer> queueSizes = new HashMap<>();
+        for (Map.Entry<String, IntersectionStats> entry : intersectionStats.entrySet()) {
+            queueSizes.put(entry.getKey(), entry.getValue().getCurrentQueueSize());
+        }
+        return queueSizes;
+    }
+    
+    /**
+     * Define a política de roteamento solicitada pelo dashboard.
+     * O coordenador deve verificar periodicamente e aplicar a mudança.
+     */
+    public void setRequestedRoutingPolicy(String policy) {
+        this.requestedRoutingPolicy = policy;
+    }
+    
+    /**
+     * Obtém e limpa a política de roteamento solicitada.
+     * Retorna null se não houver mudança pendente.
+     */
+    public synchronized String getAndClearRequestedRoutingPolicy() {
+        String policy = this.requestedRoutingPolicy;
+        this.requestedRoutingPolicy = null;
+        return policy;
+    }
+    
+    public void display() {
+        System.out.println("\n--- GLOBAL STATISTICS ---");
+        System.out.printf("Total Vehicles Generated: %d%n", getTotalVehiclesGenerated());
+        System.out.printf("Total Vehicles Completed: %d%n", getTotalVehiclesCompleted());
+        System.out.printf("Vehicles In Transit: %d%n", 
+            getTotalVehiclesGenerated() - getTotalVehiclesCompleted());
+        System.out.printf("Average System Time: %.2f ms%n", getAverageSystemTime());
+        System.out.printf("Average Waiting Time: %.2f ms%n", getAverageWaitingTime());
+        
+        System.out.println("\n--- VEHICLE TYPE STATISTICS ---");
+        for (VehicleType type : VehicleType.values()) {
+            int count = getVehicleTypeCount(type);
+            double avgWait = getAverageWaitingTimeByType(type);
+            System.out.printf("%s: %d vehicles, avg wait: %.2f ms%n", 
+                type, count, avgWait);
+        }
+        
+        System.out.println("\n--- INTERSECTION STATISTICS ---");
+        if (intersectionStats.isEmpty()) {
+            System.out.println("(No data received yet)");
+        } else {
+            for (IntersectionStats stats : intersectionStats.values()) {
+                stats.display();
+            }
+        }
+        
+        System.out.printf("%nLast Update: %tT%n", lastUpdateTime);
+    }
+    
+    public static class IntersectionStats {
+        private final String intersectionId;
+        private final AtomicInteger totalArrivals;
+        private final AtomicInteger totalDepartures;
+        private final AtomicInteger currentQueueSize;
+        
+        public IntersectionStats(String intersectionId) {
+            this.intersectionId = intersectionId;
+            this.totalArrivals = new AtomicInteger(0);
+            this.totalDepartures = new AtomicInteger(0);
+            this.currentQueueSize = new AtomicInteger(0);
+        }
+        
+        public void updateStats(int arrivals, int departures, int queueSize) {
+            this.totalArrivals.set(arrivals);
+            this.totalDepartures.set(departures);
+            this.currentQueueSize.set(queueSize);
+        }
+        
+        public String getIntersectionId() {
+            return intersectionId;
+        }
+        
+        public int getTotalArrivals() {
+            return totalArrivals.get();
+        }
+        
+        public int getTotalDepartures() {
+            return totalDepartures.get();
+        }
+        
+        public int getCurrentQueueSize() {
+            return currentQueueSize.get();
+        }
+        
+        public void display() {
+            System.out.printf("%s: Arrivals=%d, Departures=%d, Queue=%d%n",
+                intersectionId, getTotalArrivals(), getTotalDepartures(), getCurrentQueueSize());
+        }
+    }
+}

main/src/main/java/sd/dashboard/DashboardUI.java

@@ -0,0 +1,605 @@
+package sd.dashboard;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.geometry.Insets;
+import javafx.geometry.Pos;
+import javafx.scene.Scene;
+import javafx.scene.control.Alert;
+import javafx.scene.control.Button;
+import javafx.scene.control.ComboBox;
+import javafx.scene.control.Label;
+import javafx.scene.control.TableColumn;
+import javafx.scene.control.TableView;
+import javafx.scene.control.cell.PropertyValueFactory;
+import javafx.scene.layout.BorderPane;
+import javafx.scene.layout.GridPane;
+import javafx.scene.layout.HBox;
+import javafx.scene.layout.Priority;
+import javafx.scene.layout.Region;
+import javafx.scene.layout.VBox;
+import javafx.scene.shape.Circle;
+import javafx.stage.Stage;
+import sd.config.SimulationConfig;
+import sd.model.VehicleType;
+
+/**
+ * JavaFX-based Dashboard UI for displaying real-time simulation statistics.
+ * Provides a graphical interface with auto-updating statistics panels.
+ */
+public class DashboardUI extends Application {
+
+    private DashboardServer server;
+    private DashboardStatistics statistics;
+
+    // Global Statistics Labels
+    private Label lblVehiclesGenerated;
+    private Label lblVehiclesCompleted;
+    private Label lblVehiclesInTransit;
+    private Label lblAvgSystemTime;
+    private Label lblAvgWaitingTime;
+    private Label lblLastUpdate;
+
+    // Vehicle Type Table
+    private TableView<VehicleTypeRow> vehicleTypeTable;
+
+    // Intersection Table
+    private TableView<IntersectionRow> intersectionTable;
+
+    // Update scheduler
+    private ScheduledExecutorService updateScheduler;
+
+    // Configuration controls
+    private ComboBox<String> configFileSelector;
+    private String selectedConfigFile = "simulation.properties";
+    private Label configInfoLabel;
+
+    @Override
+    public void start(Stage primaryStage) {
+        try {
+            // Initialize server
+            String configFile = getParameters().getRaw().isEmpty()
+                    ? "src/main/resources/simulation.properties"
+                    : getParameters().getRaw().get(0);
+
+            SimulationConfig config = new SimulationConfig(configFile);
+            server = new DashboardServer(config);
+            statistics = server.getStatistics();
+
+            // Start the dashboard server
+            server.start();
+
+            // Build UI
+            BorderPane root = new BorderPane();
+            root.getStyleClass().add("root");
+
+            // Header
+            VBox header = createHeader();
+            root.setTop(header);
+
+            // Main content
+            VBox mainContent = createMainContent();
+            root.setCenter(mainContent);
+
+            // Footer
+            HBox footer = createFooter();
+            root.setBottom(footer);
+
+            // Create scene
+            Scene scene = new Scene(root, 1200, 850);
+
+            // Load CSS
+            String cssUrl = getClass().getResource("/dashboard.css").toExternalForm();
+            scene.getStylesheets().add(cssUrl);
+
+            primaryStage.setTitle("Traffic Simulation Dashboard - Real-time Statistics");
+            primaryStage.setScene(scene);
+            primaryStage.show();
+
+            // Start periodic updates
+            startPeriodicUpdates();
+
+            // Handle window close
+            primaryStage.setOnCloseRequest(event -> {
+                shutdown();
+            });
+
+        } catch (Exception e) {
+            showErrorAlert("Failed to start Dashboard Server", e.getMessage());
+            e.printStackTrace();
+            Platform.exit();
+        }
+    }
+
+    private VBox createHeader() {
+        VBox header = new VBox(10);
+        header.getStyleClass().add("header");
+        header.setAlignment(Pos.CENTER);
+
+        Label title = new Label("DISTRIBUTED TRAFFIC SIMULATION DASHBOARD");
+        title.getStyleClass().add("header-title");
+
+        Label subtitle = new Label("Real-time Statistics and Monitoring");
+        subtitle.getStyleClass().add("header-subtitle");
+
+        // Configuration Panel
+        VBox configPanel = createConfigurationPanel();
+
+        // Control Buttons
+        HBox controls = new HBox(15);
+        controls.setAlignment(Pos.CENTER);
+
+        Button btnStart = new Button("START SIMULATION");
+        btnStart.getStyleClass().add("button-start");
+
+        Button btnStop = new Button("STOP SIMULATION");
+        btnStop.getStyleClass().add("button-stop");
+        btnStop.setDisable(true);
+
+        SimulationProcessManager processManager = new SimulationProcessManager();
+
+        btnStart.setOnAction(e -> {
+            try {
+                // Passar o ficheiro de configuração selecionado
+                processManager.setConfigFile(selectedConfigFile);
+                processManager.startSimulation();
+                btnStart.setDisable(true);
+                btnStop.setDisable(false);
+                configFileSelector.setDisable(true); // Bloquear mudanças durante simulação
+            } catch (IOException ex) {
+                showErrorAlert("Start Failed", "Could not start simulation processes: " + ex.getMessage());
+            }
+        });
+
+        btnStop.setOnAction(e -> {
+            processManager.stopSimulation();
+            btnStart.setDisable(false);
+            btnStop.setDisable(true);
+            configFileSelector.setDisable(false); // Desbloquear para nova simulação
+        });
+
+        controls.getChildren().addAll(btnStart, btnStop);
+
+        header.getChildren().addAll(title, subtitle, configPanel, controls);
+
+        return header;
+    }
+
+    /**
+     * Cria o painel de configuração com seleção de cenário e parâmetros.
+     */
+    private VBox createConfigurationPanel() {
+        VBox configBox = new VBox(10);
+        configBox.setAlignment(Pos.CENTER);
+        configBox.setPadding(new Insets(10));
+        configBox.setStyle("-fx-background-color: rgba(255, 255, 255, 0.05); -fx-background-radius: 5;");
+
+        Label configLabel = new Label("Configuração da Simulação");
+        configLabel.setStyle("-fx-font-size: 14px; -fx-font-weight: bold;");
+
+        HBox configControls = new HBox(20);
+        configControls.setAlignment(Pos.CENTER);
+
+        // Scenario selector
+        VBox scenarioBox = new VBox(5);
+        scenarioBox.setAlignment(Pos.CENTER_LEFT);
+        Label scenarioLabel = new Label("Cenário:");
+        scenarioLabel.setStyle("-fx-font-size: 12px;");
+        
+        configFileSelector = new ComboBox<>();
+        configFileSelector.getItems().addAll(
+            "simulation.properties",
+            "simulation-low.properties",
+            "simulation-medium.properties",
+            "simulation-high.properties"
+        );
+        configFileSelector.setValue("simulation.properties");
+        configFileSelector.setOnAction(e -> {
+            selectedConfigFile = configFileSelector.getValue();
+            updateConfigInfo();
+            System.out.println("Configuração selecionada: " + selectedConfigFile);
+        });
+        
+        scenarioBox.getChildren().addAll(scenarioLabel, configFileSelector);
+        configControls.getChildren().add(scenarioBox);
+
+        // Routing policy selector
+        VBox routingBox = new VBox(5);
+        routingBox.setAlignment(Pos.CENTER_LEFT);
+        Label routingLabel = new Label("Política de Roteamento:");
+        routingLabel.setStyle("-fx-font-size: 12px;");
+        
+        ComboBox<String> routingPolicySelector = new ComboBox<>();
+        routingPolicySelector.getItems().addAll(
+            "RANDOM",
+            "SHORTEST_PATH",
+            "LEAST_CONGESTED"
+        );
+        routingPolicySelector.setValue("RANDOM");
+        routingPolicySelector.setOnAction(e -> {
+            String selectedPolicy = routingPolicySelector.getValue();
+            System.out.println("Política de roteamento selecionada: " + selectedPolicy);
+            sendRoutingPolicyChange(selectedPolicy);
+        });
+        
+        routingBox.getChildren().addAll(routingLabel, routingPolicySelector);
+        configControls.getChildren().add(routingBox);
+
+        // Advanced configuration button
+        VBox buttonBox = new VBox(5);
+        buttonBox.setAlignment(Pos.CENTER_LEFT);
+        Label spacerLabel = new Label(" ");
+        spacerLabel.setStyle("-fx-font-size: 12px;");
+        
+        Button btnAdvancedConfig = new Button("Configuração Avançada...");
+        btnAdvancedConfig.setStyle("-fx-font-size: 11px;");
+        btnAdvancedConfig.setOnAction(e -> {
+            ConfigurationDialog.showAdvancedConfig((Stage) configBox.getScene().getWindow());
+        });
+        
+        Button btnBatchAnalysis = new Button("Análise em Lote...");
+        btnBatchAnalysis.setStyle("-fx-font-size: 11px;");
+        btnBatchAnalysis.setOnAction(e -> {
+            BatchAnalysisDialog.show((Stage) configBox.getScene().getWindow(), statistics);
+        });
+        
+        buttonBox.getChildren().addAll(spacerLabel, btnAdvancedConfig, btnBatchAnalysis);
+        configControls.getChildren().add(buttonBox);
+
+        // Configuration info display
+        configInfoLabel = new Label();
+        configInfoLabel.setStyle("-fx-font-size: 11px; -fx-text-fill: #aaaaaa;");
+        configInfoLabel.setWrapText(true);
+        configInfoLabel.setMaxWidth(800);
+        configInfoLabel.setAlignment(Pos.CENTER);
+        updateConfigInfo();
+
+        configBox.getChildren().addAll(configLabel, configControls, configInfoLabel);
+        return configBox;
+    }
+
+    private VBox createMainContent() {
+        VBox mainContent = new VBox(20);
+        mainContent.setPadding(new Insets(20));
+
+        // Global Statistics Panel
+        VBox globalStatsCard = createGlobalStatisticsPanel();
+
+        // Tables Container
+        HBox tablesContainer = new HBox(20);
+        tablesContainer.setAlignment(Pos.TOP_CENTER);
+
+        // Vehicle Type Statistics Panel
+        VBox vehicleTypeCard = createVehicleTypePanel();
+        HBox.setHgrow(vehicleTypeCard, Priority.ALWAYS);
+
+        // Intersection Statistics Panel
+        VBox intersectionCard = createIntersectionPanel();
+        HBox.setHgrow(intersectionCard, Priority.ALWAYS);
+
+        tablesContainer.getChildren().addAll(vehicleTypeCard, intersectionCard);
+
+        mainContent.getChildren().addAll(globalStatsCard, tablesContainer);
+
+        return mainContent;
+    }
+
+    private VBox createGlobalStatisticsPanel() {
+        VBox card = new VBox();
+        card.getStyleClass().add("card");
+
+        // Card Header
+        HBox cardHeader = new HBox();
+        cardHeader.getStyleClass().add("card-header");
+        Label cardTitle = new Label("Global Statistics");
+        cardTitle.getStyleClass().add("card-title");
+        cardHeader.getChildren().add(cardTitle);
+
+        // Card Content
+        GridPane grid = new GridPane();
+        grid.getStyleClass().add("card-content");
+        grid.setHgap(40);
+        grid.setVgap(15);
+        grid.setAlignment(Pos.CENTER);
+
+        // Initialize labels
+        lblVehiclesGenerated = createStatValueLabel("0");
+        lblVehiclesCompleted = createStatValueLabel("0");
+        lblVehiclesInTransit = createStatValueLabel("0");
+        lblAvgSystemTime = createStatValueLabel("0.00 s");
+        lblAvgWaitingTime = createStatValueLabel("0.00 s");
+
+        // Add labels with descriptions
+        addStatRow(grid, 0, 0, "Total Vehicles Generated", lblVehiclesGenerated);
+        addStatRow(grid, 1, 0, "Total Vehicles Completed", lblVehiclesCompleted);
+        addStatRow(grid, 2, 0, "Vehicles In Transit", lblVehiclesInTransit);
+        addStatRow(grid, 0, 1, "Average System Time", lblAvgSystemTime);
+        addStatRow(grid, 1, 1, "Average Waiting Time", lblAvgWaitingTime);
+
+        card.getChildren().addAll(cardHeader, grid);
+        return card;
+    }
+
+    private VBox createVehicleTypePanel() {
+        VBox card = new VBox();
+        card.getStyleClass().add("card");
+
+        // Card Header
+        HBox cardHeader = new HBox();
+        cardHeader.getStyleClass().add("card-header");
+        Label cardTitle = new Label("Vehicle Type Statistics");
+        cardTitle.getStyleClass().add("card-title");
+        cardHeader.getChildren().add(cardTitle);
+
+        // Table
+        vehicleTypeTable = new TableView<>();
+        vehicleTypeTable.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
+        vehicleTypeTable.setPrefHeight(300);
+
+        TableColumn<VehicleTypeRow, String> typeCol = new TableColumn<>("Vehicle Type");
+        typeCol.setCellValueFactory(new PropertyValueFactory<>("vehicleType"));
+
+        TableColumn<VehicleTypeRow, Integer> countCol = new TableColumn<>("Count");
+        countCol.setCellValueFactory(new PropertyValueFactory<>("count"));
+
+        TableColumn<VehicleTypeRow, String> avgWaitCol = new TableColumn<>("Avg Wait Time");
+        avgWaitCol.setCellValueFactory(new PropertyValueFactory<>("avgWaitTime"));
+
+        vehicleTypeTable.getColumns().addAll(typeCol, countCol, avgWaitCol);
+
+        card.getChildren().addAll(cardHeader, vehicleTypeTable);
+        return card;
+    }
+
+    private VBox createIntersectionPanel() {
+        VBox card = new VBox();
+        card.getStyleClass().add("card");
+
+        // Card Header
+        HBox cardHeader = new HBox();
+        cardHeader.getStyleClass().add("card-header");
+        Label cardTitle = new Label("Intersection Statistics");
+        cardTitle.getStyleClass().add("card-title");
+        cardHeader.getChildren().add(cardTitle);
+
+        // Table
+        intersectionTable = new TableView<>();
+        intersectionTable.setColumnResizePolicy(TableView.CONSTRAINED_RESIZE_POLICY);
+        intersectionTable.setPrefHeight(300);
+
+        TableColumn<IntersectionRow, String> idCol = new TableColumn<>("Intersection ID");
+        idCol.setCellValueFactory(new PropertyValueFactory<>("intersectionId"));
+
+        TableColumn<IntersectionRow, Integer> arrivalsCol = new TableColumn<>("Total Arrivals");
+        arrivalsCol.setCellValueFactory(new PropertyValueFactory<>("arrivals"));
+
+        TableColumn<IntersectionRow, Integer> departuresCol = new TableColumn<>("Total Departures");
+        departuresCol.setCellValueFactory(new PropertyValueFactory<>("departures"));
+
+        TableColumn<IntersectionRow, Integer> queueCol = new TableColumn<>("Current Queue");
+        queueCol.setCellValueFactory(new PropertyValueFactory<>("queueSize"));
+
+        intersectionTable.getColumns().addAll(idCol, arrivalsCol, departuresCol, queueCol);
+
+        card.getChildren().addAll(cardHeader, intersectionTable);
+        return card;
+    }
+
+    private HBox createFooter() {
+        HBox footer = new HBox(10);
+        footer.getStyleClass().add("footer");
+        footer.setAlignment(Pos.CENTER_LEFT);
+
+        Label statusLabel = new Label("Status:");
+        statusLabel.getStyleClass().add("footer-text");
+        statusLabel.setStyle("-fx-font-weight: bold;");
+
+        Circle statusIndicator = new Circle(6);
+        statusIndicator.setFill(javafx.scene.paint.Color.LIME);
+
+        Label statusText = new Label("Connected and Receiving Data");
+        statusText.getStyleClass().add("footer-text");
+
+        lblLastUpdate = new Label("Last Update: --:--:--");
+        lblLastUpdate.getStyleClass().add("footer-text");
+
+        Region spacer = new Region();
+        HBox.setHgrow(spacer, Priority.ALWAYS);
+
+        footer.getChildren().addAll(statusLabel, statusIndicator, statusText, spacer, lblLastUpdate);
+
+        return footer;
+    }
+
+    private Label createStatValueLabel(String initialValue) {
+        Label label = new Label(initialValue);
+        label.getStyleClass().add("stat-value");
+        return label;
+    }
+
+    private void addStatRow(GridPane grid, int row, int colGroup, String description, Label valueLabel) {
+        VBox container = new VBox(5);
+        container.setAlignment(Pos.CENTER_LEFT);
+
+        Label descLabel = new Label(description);
+        descLabel.getStyleClass().add("stat-label");
+
+        container.getChildren().addAll(descLabel, valueLabel);
+
+        grid.add(container, colGroup, row);
+    }
+
+    private void startPeriodicUpdates() {
+        updateScheduler = Executors.newSingleThreadScheduledExecutor();
+        updateScheduler.scheduleAtFixedRate(() -> {
+            Platform.runLater(this::updateUI);
+        }, 0, 100, TimeUnit.MILLISECONDS);
+    }
+
+    private void updateUI() {
+        // Update global statistics
+        lblVehiclesGenerated.setText(String.valueOf(statistics.getTotalVehiclesGenerated()));
+        lblVehiclesCompleted.setText(String.valueOf(statistics.getTotalVehiclesCompleted()));
+        lblVehiclesInTransit.setText(String.valueOf(
+                statistics.getTotalVehiclesGenerated() - statistics.getTotalVehiclesCompleted()));
+        lblAvgSystemTime.setText(String.format("%.2f s", statistics.getAverageSystemTime() / 1000.0));
+        lblAvgWaitingTime.setText(String.format("%.2f s", statistics.getAverageWaitingTime() / 1000.0));
+        lblLastUpdate.setText(String.format("Last Update: %tT", statistics.getLastUpdateTime()));
+
+        // Update vehicle type table
+        vehicleTypeTable.getItems().clear();
+        for (VehicleType type : VehicleType.values()) {
+            int count = statistics.getVehicleTypeCount(type);
+            double avgWait = statistics.getAverageWaitingTimeByType(type);
+            vehicleTypeTable.getItems().add(new VehicleTypeRow(
+                    type.toString(), count, String.format("%.2f s", avgWait / 1000.0)));
+        }
+
+        // Update intersection table
+        intersectionTable.getItems().clear();
+        Map<String, DashboardStatistics.IntersectionStats> intersectionStats = statistics.getAllIntersectionStats();
+        for (DashboardStatistics.IntersectionStats stats : intersectionStats.values()) {
+            intersectionTable.getItems().add(new IntersectionRow(
+                    stats.getIntersectionId(),
+                    stats.getTotalArrivals(),
+                    stats.getTotalDepartures(),
+                    stats.getCurrentQueueSize()));
+        }
+    }
+
+    /**
+     * Atualiza a informação exibida sobre a configuração selecionada.
+     */
+    private void updateConfigInfo() {
+        String info = "";
+        switch (selectedConfigFile) {
+            case "simulation-low.properties":
+                info = "CARGA BAIXA: 0.2 veículos/s (~720/hora) | Sem congestionamento esperado";
+                break;
+            case "simulation-medium.properties":
+                info = "CARGA MÉDIA: 0.5 veículos/s (~1800/hora) | Algum congestionamento esperado";
+                break;
+            case "simulation-high.properties":
+                info = "CARGA ALTA: 1.0 veículo/s (~3600/hora) | Congestionamento significativo esperado";
+                break;
+            default:
+                info = "⚙️ CONFIGURAÇÃO PADRÃO: Verificar ficheiro para parâmetros";
+                break;
+        }
+        configInfoLabel.setText(info);
+    }
+
+    private void shutdown() {
+        System.out.println("Shutting down Dashboard UI...");
+
+        if (updateScheduler != null && !updateScheduler.isShutdown()) {
+            updateScheduler.shutdownNow();
+        }
+
+        if (server != null) {
+            server.stop();
+        }
+
+        Platform.exit();
+    }
+
+    private void showErrorAlert(String title, String message) {
+        Alert alert = new Alert(Alert.AlertType.ERROR);
+        alert.setTitle(title);
+        alert.setHeaderText(null);
+        alert.setContentText(message);
+        alert.showAndWait();
+    }
+
+    /**
+     * Envia mensagem para o servidor do dashboard que notificará o coordenador.
+     * Usa uma abordagem indireta: salva a política desejada e o coordenador lerá na próxima geração.
+     */
+    private void sendRoutingPolicyChange(String newPolicy) {
+        // Store the policy change request in statistics
+        // The coordinator will check this periodically
+        if (server != null && statistics != null) {
+            statistics.setRequestedRoutingPolicy(newPolicy);
+            System.out.println("Política de roteamento solicitada: " + newPolicy);
+            System.out.println("  - A mudança será aplicada pelo coordenador na próxima atualização");
+            
+            // Mostrar confirmação visual
+            Platform.runLater(() -> {
+                Alert alert = new Alert(Alert.AlertType.INFORMATION);
+                alert.setTitle("Política Solicitada");
+                alert.setHeaderText(null);
+                alert.setContentText("Política de roteamento solicitada: " + newPolicy + "\nSerá aplicada em breve.");
+                alert.show();
+            });
+        } else {
+            Platform.runLater(() -> {
+                showErrorAlert("Erro", "Dashboard não está conectado. Inicie a simulação primeiro.");
+            });
+        }
+    }
+
+    public static void main(String[] args) {
+        launch(args);
+    }
+
+    // Inner classes for TableView data models
+    public static class VehicleTypeRow {
+        private final String vehicleType;
+        private final int count;
+        private final String avgWaitTime;
+
+        public VehicleTypeRow(String vehicleType, int count, String avgWaitTime) {
+            this.vehicleType = vehicleType;
+            this.count = count;
+            this.avgWaitTime = avgWaitTime;
+        }
+
+        public String getVehicleType() {
+            return vehicleType;
+        }
+
+        public int getCount() {
+            return count;
+        }
+
+        public String getAvgWaitTime() {
+            return avgWaitTime;
+        }
+    }
+
+    public static class IntersectionRow {
+        private final String intersectionId;
+        private final int arrivals;
+        private final int departures;
+        private final int queueSize;
+
+        public IntersectionRow(String intersectionId, int arrivals, int departures, int queueSize) {
+            this.intersectionId = intersectionId;
+            this.arrivals = arrivals;
+            this.departures = departures;
+            this.queueSize = queueSize;
+        }
+
+        public String getIntersectionId() {
+            return intersectionId;
+        }
+
+        public int getArrivals() {
+            return arrivals;
+        }
+
+        public int getDepartures() {
+            return departures;
+        }
+
+        public int getQueueSize() {
+            return queueSize;
+        }
+    }
+}

main/src/main/java/sd/dashboard/Launcher.java

@@ -0,0 +1,7 @@
+package sd.dashboard;
+
+public class Launcher {
+    public static void main(String[] args) {
+        DashboardUI.main(args);
+    }
+}

main/src/main/java/sd/dashboard/SimulationProcessManager.java

@@ -0,0 +1,155 @@
+package sd.dashboard;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Gere o ciclo de vida dos processos de simulação (Intersections, Exit Node,
+ * Coordinator).
+ * Permite iniciar e parar a simulação distribuída dentro da aplicação Java.
+ */
+public class SimulationProcessManager {
+
+    private final List<Process> runningProcesses;
+    private final String classpath;
+    private String configFile;
+
+    public SimulationProcessManager() {
+        this.runningProcesses = new ArrayList<>();
+        this.classpath = System.getProperty("java.class.path");
+        this.configFile = "src/main/resources/simulation.properties";
+    }
+
+    /**
+     * Define o ficheiro de configuração a usar.
+     * 
+     * @param configFile nome do ficheiro (ex: "simulation-low.properties")
+     */
+    public void setConfigFile(String configFile) {
+        this.configFile = "src/main/resources/" + configFile;
+        System.out.println("Configuration file set to: " + this.configFile);
+    }
+
+    /**
+     * Inicia a simulação completa: 5 Intersections, 1 Exit Node, e 1 Coordinator.
+     * 
+     * @throws IOException se um processo falhar ao iniciar
+     */
+    public void startSimulation() throws IOException {
+        if (!runningProcesses.isEmpty()) {
+            stopSimulation();
+        }
+
+        System.out.println("Starting simulation processes...");
+
+        // 1. Start Intersections (Cr1 - Cr5)
+        String[] intersectionIds = { "Cr1", "Cr2", "Cr3", "Cr4", "Cr5" };
+        for (String id : intersectionIds) {
+            startProcess("sd.IntersectionProcess", id);
+        }
+
+        // 2. Start Exit Node
+        startProcess("sd.ExitNodeProcess", null);
+
+        // 3. Start Coordinator (Wait a bit for others to initialize)
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+        startProcess("sd.coordinator.CoordinatorProcess", null);
+
+        System.out.println("All simulation processes started.");
+    }
+
+    /**
+     * Checks if the coordinator process (last process started) is still running.
+     * When the coordinator finishes, the simulation is complete.
+     */
+    public boolean isSimulationRunning() {
+        if (runningProcesses.isEmpty()) {
+            return false;
+        }
+        // Coordinator is the last process in the list
+        Process coordinator = runningProcesses.get(runningProcesses.size() - 1);
+        return coordinator.isAlive();
+    }
+    
+    /**
+     * Waits for the simulation to complete naturally.
+     * Returns true if completed, false if timeout.
+     */
+    public boolean waitForCompletion(long timeoutSeconds) throws InterruptedException {
+        if (runningProcesses.isEmpty()) {
+            return true;
+        }
+        
+        Process coordinator = runningProcesses.get(runningProcesses.size() - 1);
+        return coordinator.waitFor(timeoutSeconds, java.util.concurrent.TimeUnit.SECONDS);
+    }
+
+    /**
+     * Stops all running simulation processes.
+     */
+    public void stopSimulation() {
+        System.out.println("Stopping simulation processes...");
+
+        for (Process process : runningProcesses) {
+            if (process.isAlive()) {
+                process.destroy(); // Try graceful termination first
+            }
+        }
+
+        // Wait a bit and force kill if necessary
+        try {
+            Thread.sleep(500);
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+
+        for (Process process : runningProcesses) {
+            if (process.isAlive()) {
+                process.destroyForcibly();
+            }
+        }
+
+        runningProcesses.clear();
+        System.out.println("All simulation processes stopped.");
+    }
+
+    /**
+     * Helper para iniciar um único processo Java.
+     */
+    private void startProcess(String className, String arg) throws IOException {
+        String javaBin = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
+
+        ProcessBuilder builder;
+        if (arg != null) {
+            builder = new ProcessBuilder(javaBin, "-cp", classpath, className, arg, configFile);
+        } else {
+            builder = new ProcessBuilder(javaBin, "-cp", classpath, className, configFile);
+        }
+
+        // get the OS temp folder
+        // Linux: /tmp/
+        // Windows: %AppData%\Local\Temp\
+        String tempDir = System.getProperty("java.io.tmpdir");
+
+        String logName = className.substring(className.lastIndexOf('.') + 1) + (arg != null ? "-" + arg : "") + ".log";
+
+        // use the (File parent, String child) constructor to handle slash/backslash
+        // automatically
+        File logFile = new File(tempDir, logName);
+
+        builder.redirectOutput(logFile);
+        builder.redirectError(logFile);
+
+        Process process = builder.start();
+        runningProcesses.add(process);
+        System.out.println("Started " + className + (arg != null ? " " + arg : ""));
+        // print where the logs are actually going
+        System.out.println("Logs redirected to: " + logFile.getAbsolutePath());
+    }
+}

main/src/main/java/sd/dashboard/StatsMessage.java

@@ -0,0 +1,48 @@
+package sd.dashboard;
+
+import sd.model.MessageType;
+import sd.protocol.MessageProtocol;
+
+/**
+ * Message wrapper for sending statistics to the dashboard.
+ */
+public class StatsMessage implements MessageProtocol {
+    
+    private static final long serialVersionUID = 1L;
+    
+    private final String sourceNode;
+    private final String destinationNode;
+    private final StatsUpdatePayload payload;
+    
+    public StatsMessage(String sourceNode, StatsUpdatePayload payload) {
+        this.sourceNode = sourceNode;
+        this.destinationNode = "DashboardServer";
+        this.payload = payload;
+    }
+    
+    @Override
+    public MessageType getType() {
+        return MessageType.STATS_UPDATE;
+    }
+    
+    @Override
+    public Object getPayload() {
+        return payload;
+    }
+    
+    @Override
+    public String getSourceNode() {
+        return sourceNode;
+    }
+    
+    @Override
+    public String getDestinationNode() {
+        return destinationNode;
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("StatsMessage[from=%s, to=%s, payload=%s]", 
+            sourceNode, destinationNode, payload);
+    }
+}

main/src/main/java/sd/dashboard/StatsUpdatePayload.java

@@ -0,0 +1,121 @@
+package sd.dashboard;
+
+import java.io.Serializable;
+import java.util.HashMap;
+import java.util.Map;
+
+import sd.model.VehicleType;
+
+/**
+ * DTO para atualizações de estatísticas ao dashboard.
+ * Campos com valor -1 não são atualizados nesta mensagem.
+ */
+public class StatsUpdatePayload implements Serializable {
+    
+    private static final long serialVersionUID = 1L;
+    
+    private int totalVehiclesGenerated = -1;
+    private int totalVehiclesCompleted = -1;
+    private long totalSystemTime = -1;
+    private long totalWaitingTime = -1;
+    
+    private int intersectionArrivals = 0;
+    private int intersectionDepartures = 0;
+    private int intersectionQueueSize = 0;
+    
+    private Map<VehicleType, Integer> vehicleTypeCounts;
+    private Map<VehicleType, Long> vehicleTypeWaitTimes;
+    
+    public StatsUpdatePayload() {
+        this.vehicleTypeCounts = new HashMap<>();
+        this.vehicleTypeWaitTimes = new HashMap<>();
+    }
+    
+    public int getTotalVehiclesGenerated() {
+        return totalVehiclesGenerated;
+    }
+    
+    public int getTotalVehiclesCompleted() {
+        return totalVehiclesCompleted;
+    }
+    
+    public long getTotalSystemTime() {
+        return totalSystemTime;
+    }
+    
+    public long getTotalWaitingTime() {
+        return totalWaitingTime;
+    }
+    
+    public int getIntersectionArrivals() {
+        return intersectionArrivals;
+    }
+    
+    public int getIntersectionDepartures() {
+        return intersectionDepartures;
+    }
+    
+    public int getIntersectionQueueSize() {
+        return intersectionQueueSize;
+    }
+    
+    public Map<VehicleType, Integer> getVehicleTypeCounts() {
+        return vehicleTypeCounts;
+    }
+    
+    public Map<VehicleType, Long> getVehicleTypeWaitTimes() {
+        return vehicleTypeWaitTimes;
+    }
+    
+    public StatsUpdatePayload setTotalVehiclesGenerated(int totalVehiclesGenerated) {
+        this.totalVehiclesGenerated = totalVehiclesGenerated;
+        return this;
+    }
+    
+    public StatsUpdatePayload setTotalVehiclesCompleted(int totalVehiclesCompleted) {
+        this.totalVehiclesCompleted = totalVehiclesCompleted;
+        return this;
+    }
+    
+    public StatsUpdatePayload setTotalSystemTime(long totalSystemTime) {
+        this.totalSystemTime = totalSystemTime;
+        return this;
+    }
+    
+    public StatsUpdatePayload setTotalWaitingTime(long totalWaitingTime) {
+        this.totalWaitingTime = totalWaitingTime;
+        return this;
+    }
+    
+    public StatsUpdatePayload setIntersectionArrivals(int intersectionArrivals) {
+        this.intersectionArrivals = intersectionArrivals;
+        return this;
+    }
+    
+    public StatsUpdatePayload setIntersectionDepartures(int intersectionDepartures) {
+        this.intersectionDepartures = intersectionDepartures;
+        return this;
+    }
+    
+    public StatsUpdatePayload setIntersectionQueueSize(int intersectionQueueSize) {
+        this.intersectionQueueSize = intersectionQueueSize;
+        return this;
+    }
+    
+    public StatsUpdatePayload setVehicleTypeCounts(Map<VehicleType, Integer> vehicleTypeCounts) {
+        this.vehicleTypeCounts = vehicleTypeCounts;
+        return this;
+    }
+    
+    public StatsUpdatePayload setVehicleTypeWaitTimes(Map<VehicleType, Long> vehicleTypeWaitTimes) {
+        this.vehicleTypeWaitTimes = vehicleTypeWaitTimes;
+        return this;
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("StatsUpdatePayload[generated=%d, completed=%d, arrivals=%d, departures=%d, queueSize=%d]",
+            totalVehiclesGenerated, totalVehiclesCompleted, intersectionArrivals, 
+            intersectionDepartures, intersectionQueueSize);
+    }
+}

main/src/main/java/sd/des/DESEventType.java

@@ -0,0 +1,39 @@
+package sd.des;
+
+/**
+ * Tipos de eventos discretos da simulação.
+ * 
+ * <p>Representa os eventos DES que avançam o estado da simulação,
+ * não categorias de logging (EventType está noutro package).
+ */
+public enum DESEventType {
+    /** Gerar novo veículo num ponto de entrada */
+    VEHICLE_GENERATION,
+    
+    /** Veículo chega a uma interseção */
+    VEHICLE_ARRIVAL,
+    
+    /** Veículo começa a atravessar o semáforo */
+    VEHICLE_CROSSING_START,
+    
+    /** Veículo termina a travessia */
+    VEHICLE_CROSSING_END,
+    
+    /** Veículo parte para o próximo destino */
+    VEHICLE_DEPARTURE,
+    
+    /** Veículo sai do sistema no nó de saída */
+    VEHICLE_EXIT,
+    
+    /** Semáforo muda de estado (VERMELHO para VERDE ou vice-versa) */
+    TRAFFIC_LIGHT_CHANGE,
+    
+    /** Processar veículos que esperam num semáforo recém-verde */
+    PROCESS_GREEN_LIGHT,
+    
+    /** Atualização periódica de estatísticas */
+    STATISTICS_UPDATE,
+    
+    /** Terminação da simulação */
+    SIMULATION_END
+}

main/src/main/java/sd/des/EventQueue.java

@@ -0,0 +1,137 @@
+package sd.des;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.PriorityQueue;
+
+/**
+ * Gere a Lista de Eventos Futuros (FEL) para Simulação de Eventos Discretos.
+ * 
+ * <p>A FEL é uma fila de prioridade que mantém todos os eventos futuros agendados,
+ * ordenados por timestamp. Este é o coração do paradigma DES - a simulação avança
+ * processando eventos em ordem cronológica.</p>
+ */
+public class EventQueue {
+    private final PriorityQueue<SimulationEvent> queue;
+    private final List<SimulationEvent> processedEvents;  // For logging and analysis
+    private final boolean trackHistory;
+    
+    public EventQueue() {
+        this(true);
+    }
+    
+    public EventQueue(boolean trackHistory) {
+        this.queue = new PriorityQueue<>();
+        this.processedEvents = trackHistory ? new ArrayList<>() : null;
+        this.trackHistory = trackHistory;
+    }
+    
+    /**
+     * Agenda um novo evento.
+     * 
+     * @param event evento a agendar
+     */
+    public void schedule(SimulationEvent event) {
+        queue.offer(event);
+    }
+    
+    /**
+     * Agenda um evento com um atraso relativo ao tempo atual.
+     * 
+     * @param currentTime tempo atual da simulação
+     * @param delay atraso em segundos
+     * @param type tipo de evento
+     * @param payload dados do evento
+     * @param location localização do evento
+     */
+    public void scheduleIn(double currentTime, double delay, DESEventType type, 
+                           Object payload, String location) {
+        double eventTime = currentTime + delay;
+        schedule(new SimulationEvent(eventTime, type, payload, location));
+    }
+    
+    /** Obtém o próximo evento sem o remover */
+    public SimulationEvent peek() {
+        return queue.peek();
+    }
+    
+    /**
+     * Obtém e remove o próximo evento.
+     * Se o rastreamento de histórico estiver ativo, adiciona-o aos eventos processados.
+     */
+    public SimulationEvent poll() {
+        SimulationEvent event = queue.poll();
+        if (event != null && trackHistory) {
+            processedEvents.add(event);
+        }
+        return event;
+    }
+    
+    /** Verifica se existem eventos pendentes */
+    public boolean isEmpty() {
+        return queue.isEmpty();
+    }
+    
+    /** @return número de eventos pendentes */
+    public int size() {
+        return queue.size();
+    }
+    
+    /** Limpa todos os eventos pendentes */
+    public void clear() {
+        queue.clear();
+    }
+    
+    /**
+     * Obtém todos os eventos processados (se o rastreamento estiver ativo).
+     * Retorna uma cópia para evitar modificações.
+     */
+    public List<SimulationEvent> getProcessedEvents() {
+        if (!trackHistory) {
+            throw new UnsupportedOperationException("History tracking is disabled");
+        }
+        return new ArrayList<>(processedEvents);
+    }
+    
+    /** @return número de eventos processados */
+    public int getProcessedCount() {
+        return trackHistory ? processedEvents.size() : 0;
+    }
+    
+    /**
+     * Exporta o histórico de eventos para uma string formatada.
+     * Útil para debugging e visualização da lista completa de eventos.
+     */
+    public String exportEventHistory() {
+        if (!trackHistory) {
+            return "Event history tracking is disabled";
+        }
+        
+        StringBuilder sb = new StringBuilder();
+        sb.append("=".repeat(80)).append("\n");
+        sb.append("SIMULATION EVENT HISTORY\n");
+        sb.append("Total Events Processed: ").append(processedEvents.size()).append("\n");
+        sb.append("=".repeat(80)).append("\n");
+        sb.append(String.format("%-10s | %-25s | %-20s | %s\n", 
+            "Time", "Event Type", "Location", "Details"));
+        sb.append("-".repeat(80)).append("\n");
+        
+        for (SimulationEvent event : processedEvents) {
+            String details = event.getPayload() != null ? 
+                event.getPayload().getClass().getSimpleName() : "null";
+            sb.append(String.format("%-10.3f | %-25s | %-20s | %s\n",
+                event.getTimestamp(),
+                event.getType(),
+                event.getLocation() != null ? event.getLocation() : "N/A",
+                details));
+        }
+        
+        return sb.toString();
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("EventQueue[pending=%d, processed=%d]", 
+            queue.size(), getProcessedCount());
+    }
+}

main/src/main/java/sd/des/SimulationClock.java

@@ -0,0 +1,67 @@
+package sd.des;
+
+/**
+ * Gere o tempo de simulação para Simulação de Eventos Discretos.
+ * 
+ * <p>No DES, o tempo avança em saltos discretos de evento para evento,
+ * não de forma contínua como o tempo real.</p>
+ * 
+ * <p>Esta classe garante que todos os processos no sistema distribuído
+ * mantêm uma visão sincronizada do tempo de simulação.</p>
+ */
+public class SimulationClock {
+    private double currentTime;
+    private final double startTime;
+    private final long wallClockStart;
+    
+    public SimulationClock() {
+        this(0.0);
+    }
+    
+    public SimulationClock(double startTime) {
+        this.currentTime = startTime;
+        this.startTime = startTime;
+        this.wallClockStart = System.currentTimeMillis();
+    }
+    
+    /**
+     * Avança o tempo de simulação para o timestamp dado.
+     * O tempo só pode avançar, nunca recuar.
+     * 
+     * @param newTime novo tempo de simulação
+     * @throws IllegalArgumentException se newTime for anterior ao tempo atual
+     */
+    public void advanceTo(double newTime) {
+        if (newTime < currentTime) {
+            throw new IllegalArgumentException(
+                String.format("Cannot move time backwards: %.3f -> %.3f", currentTime, newTime));
+        }
+        this.currentTime = newTime;
+    }
+    
+    /** @return tempo atual da simulação */
+    public double getCurrentTime() {
+        return currentTime;
+    }
+    
+    /** @return tempo de simulação decorrido desde o início */
+    public double getElapsedTime() {
+        return currentTime - startTime;
+    }
+    
+    /** @return tempo real decorrido em milissegundos */
+    public long getWallClockElapsed() {
+        return System.currentTimeMillis() - wallClockStart;
+    }
+    
+    /** Reinicia o relógio para o tempo inicial */
+    public void reset() {
+        this.currentTime = startTime;
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("SimulationClock[time=%.3fs, elapsed=%.3fs]", 
+            currentTime, getElapsedTime());
+    }
+}

main/src/main/java/sd/des/SimulationEvent.java

@@ -0,0 +1,98 @@
+package sd.des;
+
+import java.io.Serializable;
+
+/**
+ * Evento discreto da simulação.
+ * 
+ * <p>Unidade fundamental de execução num sistema DES:
+ * <ul>
+ * <li>timestamp - quando ocorre
+ * <li>type - o que acontece
+ * <li>payload - dados associados
+ * <li>location - qual processo o trata
+ * </ul>
+ */
+public class SimulationEvent implements Comparable<SimulationEvent>, Serializable {
+    private static final long serialVersionUID = 1L;
+    
+    private final double timestamp;
+    private final DESEventType type;
+    private final Object payload;
+    private final String location;  // Process ID (e.g., "Cr1", "Coordinator", "Exit")
+    
+    /**
+     * Cria um novo evento de simulação.
+     * 
+     * @param timestamp instante do evento (tempo de simulação em segundos)
+     * @param type tipo de evento
+     * @param payload dados associados (ex: objeto Vehicle)
+     * @param location processo que trata o evento
+     */
+    public SimulationEvent(double timestamp, DESEventType type, Object payload, String location) {
+        this.timestamp = timestamp;
+        this.type = type;
+        this.payload = payload;
+        this.location = location;
+    }
+    
+    /** Cria evento sem localização (para eventos locais) */
+    public SimulationEvent(double timestamp, DESEventType type, Object payload) {
+        this(timestamp, type, payload, null);
+    }
+    
+    public double getTimestamp() {
+        return timestamp;
+    }
+    
+    public DESEventType getType() {
+        return type;
+    }
+    
+    public Object getPayload() {
+        return payload;
+    }
+    
+    public String getLocation() {
+        return location;
+    }
+    
+    /**
+     * Ordena eventos por timestamp (mais cedo primeiro).
+     * Em caso de empate, ordena por tipo para determinismo.
+     */
+    @Override
+    public int compareTo(SimulationEvent other) {
+        int timeComparison = Double.compare(this.timestamp, other.timestamp);
+        if (timeComparison != 0) {
+            return timeComparison;
+        }
+        // Tie-breaker: order by event type name
+        return this.type.name().compareTo(other.type.name());
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("Event[t=%.3f, type=%s, location=%s]", 
+            timestamp, type, location);
+    }
+    
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (!(obj instanceof SimulationEvent)) return false;
+        SimulationEvent other = (SimulationEvent) obj;
+        return Double.compare(timestamp, other.timestamp) == 0 &&
+               type == other.type &&
+               (location == null ? other.location == null : location.equals(other.location));
+    }
+    
+    @Override
+    public int hashCode() {
+        int result = 17;
+        result = 31 * result + Double.hashCode(timestamp);
+        result = 31 * result + type.hashCode();
+        result = 31 * result + (location != null ? location.hashCode() : 0);
+        return result;
+    }
+}

main/src/main/java/sd/des/TrafficLightEvent.java

@@ -0,0 +1,36 @@
+package sd.des;
+
+import sd.model.TrafficLight;
+
+/**
+ * Payload for traffic light change events.
+ * Contains the traffic light and its direction.
+ */
+public class TrafficLightEvent {
+    private final TrafficLight light;
+    private final String direction;
+    private final String intersectionId;
+    
+    public TrafficLightEvent(TrafficLight light, String direction, String intersectionId) {
+        this.light = light;
+        this.direction = direction;
+        this.intersectionId = intersectionId;
+    }
+    
+    public TrafficLight getLight() {
+        return light;
+    }
+    
+    public String getDirection() {
+        return direction;
+    }
+    
+    public String getIntersectionId() {
+        return intersectionId;
+    }
+    
+    @Override
+    public String toString() {
+        return String.format("TrafficLightEvent[%s-%s]", intersectionId, direction);
+    }
+}

main/src/main/java/sd/engine/SimulationEngine.java

@@ -1,628 +0,0 @@
-package sd.engine;
-
-import java.util.HashMap;
-import java.util.Map;
-import java.util.PriorityQueue;
-
-import sd.config.SimulationConfig;
-import sd.model.Event;
-import sd.model.EventType;
-import sd.model.Intersection;
-import sd.model.TrafficLight;
-import sd.model.TrafficLightState;
-import sd.model.Vehicle;
-import sd.model.VehicleType;
-import sd.util.StatisticsCollector;
-import sd.util.VehicleGenerator;
-
-/**
- * Core simulation engine using discrete event simulation (DES).
- * * This class orchestrates the entire simulation. It maintains a
- * {@link PriorityQueue} of {@link Event} objects, representing all
- * scheduled future actions. The engine processes events in strict
- * chronological order (based on their timestamp).
- * * It manages the simulation's state, including:
- * - The current simulation time ({@code currentTime}).
- * - The collection of all {@link Intersection} objects.
- * - The {@link VehicleGenerator} for creating new vehicles.
- * - The {@link StatisticsCollector} for tracking metrics.
- */
-public class SimulationEngine {
-    
-    /**
-     * Holds all simulation parameters loaded from the properties file.
-     */
-    private final SimulationConfig config;
-    
-    /**
-     * The core of the discrete event simulation. Events are pulled from this
-     * queue in order of their timestamp.
-     */
-    private final PriorityQueue<Event> eventQueue;
-    
-    /**
-     * A map storing all intersections in the simulation, keyed by their ID (e.g., "Cr1").
-     */
-    private final Map<String, Intersection> intersections;
-    
-    /**
-     * Responsible for creating new vehicles according to the configured arrival model.
-     */
-    private final VehicleGenerator vehicleGenerator;
-    
-    /**
-     * Collects and calculates statistics throughout the simulation.
-     */
-    private final StatisticsCollector statisticsCollector;
-    
-    /**
-     * The current time in the simulation (in virtual seconds).
-     * This time advances based on the timestamp of the event being processed.
-     */
-    private double currentTime;
-    
-    /**
-     * A simple counter to generate unique IDs for vehicles.
-     */
-    private int vehicleCounter;
-    
-    /**
-     * Constructs a new SimulationEngine.
-     *
-     * @param config The {@link SimulationConfig} object containing all
-     * simulation parameters.
-     */
-    public SimulationEngine(SimulationConfig config) {
-        this.config = config;
-        this.eventQueue = new PriorityQueue<>();
-        this.intersections = new HashMap<>();
-        this.vehicleGenerator = new VehicleGenerator(config);
-        this.statisticsCollector = new StatisticsCollector(config);
-        this.currentTime = 0.0;
-        this.vehicleCounter = 0;
-    }
-    
-    /**
-     * Initializes the simulation. This involves:
-     * 1. Creating all {@link Intersection} and {@link TrafficLight} objects.
-     * 2. Configuring the routing logic between intersections.
-     * 3. Scheduling the initial events (first traffic light changes,
-     * first vehicle generation, and periodic statistics updates).
-     */
-    public void initialize() {
-        System.out.println("Initializing simulation...");
-        
-        setupIntersections();
-        setupRouting();
-        
-        // Schedule initial events to "bootstrap" the simulation
-        scheduleTrafficLightEvents();
-        scheduleNextVehicleGeneration(0.0);
-        scheduleStatisticsUpdates();
-        
-        System.out.println("Simulation initialized with " + intersections.size() + " intersections");
-    }
-    
-    /**
-     * Creates all intersections defined in the configuration
-     * and adds their corresponding traffic lights.
-     */
-    private void setupIntersections() {
-        String[] intersectionIds = {"Cr1", "Cr2", "Cr3", "Cr4", "Cr5"};
-        // Note: "North" is commented out, so it won't be created.
-        String[] directions = {/*"North",*/ "South", "East", "West"};
-        
-        for (String id : intersectionIds) {
-            Intersection intersection = new Intersection(id);
-            
-            // Add traffic lights for each configured direction
-            for (String direction : directions) {
-                double greenTime = config.getTrafficLightGreenTime(id, direction);
-                double redTime = config.getTrafficLightRedTime(id, direction);
-                
-                TrafficLight light = new TrafficLight(
-                    id + "-" + direction,
-                    direction,
-                    greenTime,
-                    redTime
-                );
-                
-                intersection.addTrafficLight(light);
-            }
-            
-            intersections.put(id, intersection);
-        }
-    }
-    
-    /**
-     * Configures how vehicles should be routed between intersections.
-     * This hardcoded logic defines the "map" of the city.
-     * * For example, `intersections.get("Cr1").configureRoute("Cr2", "East");` means
-     * "at intersection Cr1, any vehicle whose *next* destination is Cr2
-     * should be sent to the 'East' traffic light queue."
-     */
-    private void setupRouting() {
-        // Cr1 routing
-        intersections.get("Cr1").configureRoute("Cr2", "East");
-        intersections.get("Cr1").configureRoute("Cr4", "South");
-        
-        // Cr2 routing
-        intersections.get("Cr2").configureRoute("Cr1", "West");
-        intersections.get("Cr2").configureRoute("Cr3", "East");
-        intersections.get("Cr2").configureRoute("Cr5", "South");
-        
-        // Cr3 routing
-        intersections.get("Cr3").configureRoute("Cr2", "West");
-        intersections.get("Cr3").configureRoute("S", "South"); // "S" is the exit
-        
-        // Cr4 routing
-        //intersections.get("Cr4").configureRoute("Cr1", "North");
-        intersections.get("Cr4").configureRoute("Cr5", "East");
-        
-        // Cr5 routing
-        //intersections.get("Cr5").configureRoute("Cr2", "North");
-        //intersections.get("Cr5").configureRoute("Cr4", "West");
-        intersections.get("Cr5").configureRoute("S", "East"); // "S" is the exit
-    }
-    
-    /**
-     * Schedules the initial {@link EventType#TRAFFIC_LIGHT_CHANGE} event
-     * for every traffic light in the simulation.
-     * A small random delay is added to "stagger" the lights, preventing
-     * all of them from changing at the exact same time at t=0.
-     */
-    private void scheduleTrafficLightEvents() {
-        for (Intersection intersection : intersections.values()) {
-            for (TrafficLight light : intersection.getTrafficLights()) {
-                // Start with lights in RED state, schedule first GREEN change
-                // Stagger the start times slightly to avoid all lights changing at once
-                double staggerDelay = Math.random() * 1.5;
-                scheduleTrafficLightChange(light, intersection.getId(), staggerDelay);
-            }
-        }
-    }
-    
-    /**
-     * Creates and schedules a new {@link EventType#TRAFFIC_LIGHT_CHANGE} event.
-     * The event is scheduled to occur at {@code currentTime + delay}.
-     *
-     * @param light The {@link TrafficLight} that will change state.
-     * @param intersectionId The ID of the intersection where the light is located.
-     * @param delay The time (in seconds) from {@code currentTime} when the change should occur.
-     */
-    private void scheduleTrafficLightChange(TrafficLight light, String intersectionId, double delay) {
-        double changeTime = currentTime + delay;
-        Event event = new Event(changeTime, EventType.TRAFFIC_LIGHT_CHANGE, light, intersectionId);
-        eventQueue.offer(event);
-    }
-    
-    /**
-     * Schedules the next {@link EventType#VEHICLE_GENERATION} event.
-     * The time of the next arrival is determined by the {@link VehicleGenerator}.
-     *
-     * @param baseTime The time from which to calculate the next arrival (usually {@code currentTime}).
-     */
-    private void scheduleNextVehicleGeneration(double baseTime) {
-        // Get the absolute time for the next arrival.
-        double nextArrivalTime = vehicleGenerator.getNextArrivalTime(baseTime);
-        
-        // Only schedule the event if it's within the simulation's total duration.
-        if (nextArrivalTime < config.getSimulationDuration()) {
-            Event event = new Event(nextArrivalTime, EventType.VEHICLE_GENERATION, null, null);
-            eventQueue.offer(event);
-        }
-    }
-    
-    /**
-     * Schedules all periodic {@link EventType#STATISTICS_UPDATE} events
-     * for the entire duration of the simulation.
-     */
-    private void scheduleStatisticsUpdates() {
-        double interval = config.getStatisticsUpdateInterval();
-        double duration = config.getSimulationDuration();
-        
-        for (double time = interval; time < duration; time += interval) {
-            Event event = new Event(time, EventType.STATISTICS_UPDATE, null, null);
-            eventQueue.offer(event);
-        }
-    }
-    
-    /**
-     * Runs the main simulation loop.
-     * The loop continues as long as there are events in the queue and
-     * the {@code currentTime} is less than the total simulation duration.
-     * * In each iteration, it:
-     * 1. Polls the next event from the {@link #eventQueue}.
-     * 2. Advances {@link #currentTime} to the event's timestamp.
-     * 3. Calls {@link #processEvent(Event)} to handle the event.
-     * * After the loop, it prints the final statistics.
-     */
-    public void run() {
-        System.out.println("Starting simulation...");
-        double duration = config.getSimulationDuration();
-        
-        while (!eventQueue.isEmpty() && currentTime < duration) {
-            // Get the next event in chronological order
-            Event event = eventQueue.poll();
-            
-            // Advance simulation time to this event's time
-            currentTime = event.getTimestamp();
-            
-            // Process the event
-            processEvent(event);
-        }
-        
-        System.out.println("\nSimulation completed at t=" + String.format("%.2f", currentTime) + "s");
-        printFinalStatistics();
-    }
-    
-    /**
-     * Main event processing logic.
-     * Delegates the event to the appropriate handler method based on its {@link EventType}.
-     *
-     * @param event The {@link Event} to be processed.
-     */
-    private void processEvent(Event event) {
-        switch (event.getType()) {
-            case VEHICLE_GENERATION -> handleVehicleGeneration();
-                
-            case VEHICLE_ARRIVAL -> handleVehicleArrival(event);
-                
-            case TRAFFIC_LIGHT_CHANGE -> handleTrafficLightChange(event);
-                
-            case CROSSING_START -> handleCrossingStart(event);
-                
-            case CROSSING_END -> handleCrossingEnd(event);
-                
-            case STATISTICS_UPDATE -> handleStatisticsUpdate();
-                
-            default -> System.err.println("Unknown event type: " + event.getType());
-        }
-    }
-    
-    /**
-     * Handles {@link EventType#VEHICLE_GENERATION}.
-     * 1. Creates a new {@link Vehicle} using the {@link #vehicleGenerator}.
-     * 2. Records the generation event with the {@link #statisticsCollector}.
-     * 3. Schedules a {@link EventType#VEHICLE_ARRIVAL} event for the vehicle
-     * at its first destination intersection.
-     * 4. Schedules the *next* {@link EventType#VEHICLE_GENERATION} event.
-     * (Note: This line is commented out in the original, which might be a bug,
-     * as it implies only one vehicle is ever generated. It should likely be active.)
-     */
-    private void handleVehicleGeneration() {
-        Vehicle vehicle = vehicleGenerator.generateVehicle("V" + (++vehicleCounter), currentTime);
-        
-        System.out.printf("[t=%.2f] Vehicle %s generated (type=%s, route=%s)%n",
-            currentTime, vehicle.getId(), vehicle.getType(), vehicle.getRoute());
-        
-        // Register with statistics collector
-        statisticsCollector.recordVehicleGeneration(vehicle, currentTime);
-        
-        // Schedule arrival at first intersection
-        String firstIntersection = vehicle.getCurrentDestination();
-        if (firstIntersection != null && !firstIntersection.equals("S")) {
-            // Assume minimal travel time to first intersection (e.g., 1-3 seconds)
-            double arrivalTime = currentTime + 1.0 + Math.random() * 2.0;
-            Event arrivalEvent = new Event(arrivalTime, EventType.VEHICLE_ARRIVAL, vehicle, firstIntersection);
-            eventQueue.offer(arrivalEvent);
-        }
-        
-        // Schedule next vehicle generation
-        // This was commented out in the original file.
-        // For a continuous simulation, it should be enabled:
-        scheduleNextVehicleGeneration(currentTime);
-    }
-    
-    /**
-     * Handles {@link EventType#VEHICLE_ARRIVAL} at an intersection.
-     * 1. Records the arrival for statistics.
-     * 2. Advances the vehicle's internal route planner to its *next* destination.
-     * 3. If the next destination is the exit ("S") or null,
-     * the vehicle exits the system via {@link #handleVehicleExit(Vehicle)}.
-     * 4. Otherwise, the vehicle is placed in the correct queue at the
-     * current intersection using {@link Intersection#receiveVehicle(Vehicle)}.
-     * 5. Attempts to process the vehicle immediately if its light is green.
-     *
-     * @param event The arrival event, containing the {@link Vehicle} and intersection ID.
-     */
-    private void handleVehicleArrival(Event event) {
-        Vehicle vehicle = (Vehicle) event.getData();
-        String intersectionId = event.getLocation();
-        
-        Intersection intersection = intersections.get(intersectionId);
-        if (intersection == null) {
-            System.err.println("Unknown intersection: " + intersectionId);
-            return;
-        }
-        
-        System.out.printf("[t=%.2f] Vehicle %s arrived at %s%n",
-            currentTime, vehicle.getId(), intersectionId);
-        
-        // Record arrival time (used to calculate waiting time later)
-        statisticsCollector.recordVehicleArrival(vehicle, intersectionId, currentTime);
-        
-        // Advance the vehicle's route to the *next* stop
-        // (it has now arrived at its *current* destination)
-        boolean hasNext = vehicle.advanceRoute();
-        
-        if (!hasNext) {
-            // This was the last stop
-            handleVehicleExit(vehicle);
-            return;
-        }
-        
-        String nextDestination = vehicle.getCurrentDestination();
-        if (nextDestination == null || "S".equals(nextDestination)) {
-            // Next stop is the exit
-            handleVehicleExit(vehicle);
-            return;
-        }
-        
-        // Add vehicle to the appropriate traffic light queue based on its next destination
-        intersection.receiveVehicle(vehicle);
-        
-        // Try to process the vehicle immediately if its light is already green
-        tryProcessVehicle(vehicle, intersection);
-    }
-    
-    /**
-     * Checks if a newly arrived vehicle (or a vehicle in a queue
-     * that just turned green) can start crossing.
-     *
-     * @param vehicle The vehicle to process.
-     * @param intersection The intersection where the vehicle is.
-     */
-    private void tryProcessVehicle(Vehicle vehicle, Intersection intersection) { //FIXME
-        // Find the direction (and light) this vehicle is queued at
-        // This logic is a bit flawed: it just finds the *first* non-empty queue
-        // A better approach would be to get the light from the vehicle's route
-        String direction = intersection.getTrafficLights().stream()
-            .filter(tl -> tl.getQueueSize() > 0)
-            .map(TrafficLight::getDirection)
-            .findFirst()
-            .orElse(null);
-        
-        if (direction != null) {
-            TrafficLight light = intersection.getTrafficLight(direction);
-            // If the light is green and it's the correct one...
-            if (light != null && light.getState() == TrafficLightState.GREEN) {
-                // ...remove the vehicle from the queue (if it's at the front)
-                Vehicle v = light.removeVehicle();
-                if (v != null) {
-                    // ...and schedule its crossing.
-                    scheduleCrossing(v, intersection);
-                }
-            }
-        }
-    }
-    
-    /**
-     * Schedules the crossing for a vehicle that has just been dequeued
-     * from a green light.
-     * 1. Calculates and records the vehicle's waiting time.
-     * 2. Schedules an immediate {@link EventType#CROSSING_START} event.
-     *
-     * @param vehicle The {@link Vehicle} that is crossing.
-     * @param intersection The {@link Intersection} it is crossing.
-     */
-    private void scheduleCrossing(Vehicle vehicle, Intersection intersection) {
-        // Calculate time spent waiting at the red light
-        double waitTime = currentTime - statisticsCollector.getArrivalTime(vehicle);
-        vehicle.addWaitingTime(waitTime);
-        
-        // Schedule crossing start event *now*
-        Event crossingStart = new Event(currentTime, EventType.CROSSING_START, vehicle, intersection.getId());
-        processEvent(crossingStart); // Process immediately
-    }
-    
-    /**
-     * Handles {@link EventType#CROSSING_START}.
-     * 1. Determines the crossing time based on vehicle type.
-     * 2. Schedules a {@link EventType#CROSSING_END} event to occur
-     * at {@code currentTime + crossingTime}.
-     *
-     * @param event The crossing start event.
-     */
-    private void handleCrossingStart(Event event) {
-        Vehicle vehicle = (Vehicle) event.getData();
-        String intersectionId = event.getLocation();
-        
-        double crossingTime = getCrossingTime(vehicle.getType());
-        
-        System.out.printf("[t=%.2f] Vehicle %s started crossing at %s (duration=%.2fs)%n",
-            currentTime, vehicle.getId(), intersectionId, crossingTime);
-        
-        // Schedule the *end* of the crossing
-        double endTime = currentTime + crossingTime;
-        Event crossingEnd = new Event(endTime, EventType.CROSSING_END, vehicle, intersectionId);
-        eventQueue.offer(crossingEnd);
-    }
-    
-    /**
-     * Handles {@link EventType#CROSSING_END}.
-     * 1. Updates intersection and vehicle statistics.
-     * 2. Checks the vehicle's *next* destination.
-     * 3. If the next destination is the exit ("S"), call {@link #handleVehicleExit(Vehicle)}.
-     * 4. Otherwise, schedule a {@link EventType#VEHICLE_ARRIVAL} event at the
-     * *next* intersection, after some travel time.
-     *
-     * @param event The crossing end event.
-     */
-    private void handleCrossingEnd(Event event) {
-        Vehicle vehicle = (Vehicle) event.getData();
-        String intersectionId = event.getLocation();
-        
-        // Update stats
-        Intersection intersection = intersections.get(intersectionId);
-        if (intersection != null) {
-            intersection.incrementVehiclesSent();
-        }
-        
-        double crossingTime = getCrossingTime(vehicle.getType());
-        vehicle.addCrossingTime(crossingTime);
-        
-        System.out.printf("[t=%.2f] Vehicle %s finished crossing at %s%n",
-            currentTime, vehicle.getId(), intersectionId);
-        
-        // Decide what to do next
-        String nextDest = vehicle.getCurrentDestination();
-        if (nextDest != null && !nextDest.equals("S")) {
-            // Route to the *next* intersection
-            // Assume 5-10 seconds travel time between intersections
-            double travelTime = 5.0 + Math.random() * 5.0; 
-            double arrivalTime = currentTime + travelTime;
-            Event arrivalEvent = new Event(arrivalTime, EventType.VEHICLE_ARRIVAL, vehicle, nextDest);
-            eventQueue.offer(arrivalEvent);
-        } else {
-            // Reached the exit
-            handleVehicleExit(vehicle);
-        }
-    }
-    
-    /**
-     * Handles a vehicle exiting the simulation.
-     * Records final statistics for the vehicle.
-     *
-     * @param vehicle The {@link Vehicle} that has completed its route.
-     */
-    private void handleVehicleExit(Vehicle vehicle) {
-        System.out.printf("[t=%.2f] Vehicle %s exited the system (wait=%.2fs, travel=%.2fs)%n",
-            currentTime, vehicle.getId(), 
-            vehicle.getTotalWaitingTime(), 
-            vehicle.getTotalTravelTime(currentTime));
-        
-        // Record the exit for final statistics calculation
-        statisticsCollector.recordVehicleExit(vehicle, currentTime);
-    }
-    
-    /**
-     * Handles {@link EventType#TRAFFIC_LIGHT_CHANGE}.
-     * 1. Toggles the light's state (RED to GREEN or GREEN to RED).
-     * 2. If the light just turned GREEN, call {@link #processGreenLight(TrafficLight, Intersection)}
-     * to process any waiting vehicles.
-     * 3. Schedules the *next* state change for this light based on its
-     * green/red time duration.
-     *
-     * @param event The light change event.
-     */
-    private void handleTrafficLightChange(Event event) {
-        TrafficLight light = (TrafficLight) event.getData();
-        String intersectionId = event.getLocation();
-        
-        // Toggle state
-        TrafficLightState newState = (light.getState() == TrafficLightState.RED) 
-            ? TrafficLightState.GREEN 
-            : TrafficLightState.RED;
-        
-        light.changeState(newState);
-        
-        System.out.printf("[t=%.2f] Traffic light %s changed to %s%n",
-            currentTime, light.getId(), newState);
-        
-        // If changed to GREEN, process waiting vehicles
-        if (newState == TrafficLightState.GREEN) {
-            Intersection intersection = intersections.get(intersectionId);
-            if (intersection != null) {
-                processGreenLight(light, intersection);
-            }
-        }
-        
-        // Schedule the *next* state change for this same light
-        double nextChangeDelay = (newState == TrafficLightState.GREEN) 
-            ? light.getGreenTime() 
-            : light.getRedTime();
-        
-        scheduleTrafficLightChange(light, intersectionId, nextChangeDelay);
-    }
-    
-    /**
-     * Processes vehicles when a light turns green.
-     * It loops as long as the light is green and there are vehicles in the queue,
-     * dequeuing one vehicle at a time and scheduling its crossing.
-     * * *Note*: This is a simplified model. A real simulation would
-     * account for the *time* it takes each vehicle to cross, processing
-     * one vehicle every {@code crossingTime} seconds. This implementation
-     * processes the entire queue "instantaneously" at the moment
-     * the light turns green.
-     *
-     * @param light The {@link TrafficLight} that just turned green.
-     * @param intersection The {@link Intersection} where the light is.
-     */
-    private void processGreenLight(TrafficLight light, Intersection intersection) {
-        // While the light is green and vehicles are waiting...
-        while (light.getState() == TrafficLightState.GREEN && light.getQueueSize() > 0) {
-            Vehicle vehicle = light.removeVehicle();
-            if (vehicle != null) {
-                // Dequeue one vehicle and schedule its crossing
-                scheduleCrossing(vehicle, intersection);
-            }
-        }
-    }
-    
-    /**
-     * Handles {@link EventType#STATISTICS_UPDATE}.
-     * Calls the {@link StatisticsCollector} to print the current
-     * state of the simulation (queue sizes, averages, etc.).
-     */
-    private void handleStatisticsUpdate() {
-        System.out.printf("\n=== Statistics at t=%.2f ===%n", currentTime);
-        statisticsCollector.printCurrentStatistics(intersections, currentTime);
-        System.out.println();
-    }
-    
-    /**
-     * Utility method to get the configured crossing time for a given {@link VehicleType}.
-     *
-     * @param type The type of vehicle.
-     * @return The crossing time in seconds.
-     */
-    private double getCrossingTime(VehicleType type) {
-        return switch (type) {
-            case BIKE -> config.getBikeVehicleCrossingTime();
-            case LIGHT -> config.getLightVehicleCrossingTime();
-            case HEAVY -> config.getHeavyVehicleCrossingTime();
-            default -> 2.0;
-        }; // Default fallback
-    }
-    
-    /**
-     * Prints the final summary of statistics at the end of the simulation.
-     */
-    private void printFinalStatistics() {
-        System.out.println("\n" + "=".repeat(60));
-        System.out.println("FINAL SIMULATION STATISTICS");
-        System.out.println("=".repeat(60));
-        
-        statisticsCollector.printFinalStatistics(intersections, currentTime);
-        
-        System.out.println("=".repeat(60));
-    }
-    
-    // --- Public Getters ---
-
-    /**
-     * Gets the current simulation time.
-     * @return The time in virtual seconds.
-     */
-    public double getCurrentTime() {
-        return currentTime;
-    }
-    
-    /**
-     * Gets a map of all intersections in the simulation.
-     * Returns a copy to prevent external modification.
-     * @return A {@link Map} of intersection IDs to {@link Intersection} objects.
-     */
-    public Map<String, Intersection> getIntersections() {
-        return new HashMap<>(intersections);
-    }
-    
-    /**
-     * Gets the statistics collector instance.
-     * @return The {@link StatisticsCollector}.
-     */
-    public StatisticsCollector getStatisticsCollector() {
-        return statisticsCollector;
-    }
-}

main/src/main/java/sd/logging/EventLogger.java

@@ -0,0 +1,213 @@
+package sd.logging;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Sistema de registo centralizado de eventos para a simulação distribuída.
+ * 
+ * <p>Regista todos os eventos da simulação num ficheiro com timestamps e categorização.
+ * Thread-safe e não-bloqueante para impacto mínimo na performance.</p>
+ */
+public class EventLogger {
+    
+    private static EventLogger instance;
+    private static final Object instanceLock = new Object();
+    
+    private final PrintWriter writer;
+    private final BlockingQueue<LogEntry> logQueue;
+    private final Thread writerThread;
+    private final AtomicBoolean running;
+    private final SimpleDateFormat timestampFormat;
+    private final long simulationStartMillis;
+    
+    /** Construtor privado para padrão singleton */
+    private EventLogger(String logFilePath) throws IOException {
+        this.writer = new PrintWriter(new BufferedWriter(new FileWriter(logFilePath, false)), true);
+        this.logQueue = new LinkedBlockingQueue<>(10000);
+        this.running = new AtomicBoolean(true);
+        this.timestampFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
+        this.simulationStartMillis = System.currentTimeMillis();
+        
+        writer.println("=".repeat(80));
+        writer.println("SIMULATION EVENT LOG");
+        writer.println("Started: " + timestampFormat.format(new Date()));
+        writer.println("=".repeat(80));
+        writer.println();
+        writer.printf("%-23s | %-8s | %-20s | %-15s | %s\n", 
+            "TIMESTAMP", "REL_TIME", "EVENT_TYPE", "COMPONENT", "DESCRIPTION");
+        writer.println("-".repeat(80));
+        writer.flush();
+        
+        this.writerThread = new Thread(this::processLogQueue, "EventLogger-Writer");
+        this.writerThread.setDaemon(true);
+        this.writerThread.start();
+    }
+    
+    /** Obtém ou cria a instância singleton */
+    public static EventLogger getInstance() {
+        if (instance == null) {
+            synchronized (instanceLock) {
+                if (instance == null) {
+                    try {
+                        String logFile = "logs/simulation-events.log";
+                        java.nio.file.Files.createDirectories(
+                            java.nio.file.Paths.get("logs"));
+                        instance = new EventLogger(logFile);
+                    } catch (IOException e) {
+                        System.err.println("Failed to initialize EventLogger: " + e.getMessage());
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+        return instance;
+    }
+    
+    /**
+     * Initialize with custom log file path.
+     */
+    public static void initialize(String logFilePath) throws IOException {
+        synchronized (instanceLock) {
+            if (instance != null) {
+                instance.shutdown();
+            }
+            instance = new EventLogger(logFilePath);
+        }
+    }
+    
+    /**
+     * Logs an event (non-blocking).
+     */
+    public void log(EventType eventType, String component, String description) {
+        if (!running.get()) return;
+        
+        LogEntry entry = new LogEntry(
+            System.currentTimeMillis(),
+            eventType,
+            component,
+            description
+        );
+        
+        // Non-blocking offer - if queue is full, drop oldest
+        if (!logQueue.offer(entry)) {
+            // Queue full - this shouldn't happen with 10k buffer, but handle gracefully
+            System.err.println("EventLogger queue full - dropping event: " + eventType);
+        }
+    }
+    
+    /**
+     * Logs an event with vehicle context.
+     */
+    public void logVehicle(EventType eventType, String component, String vehicleId, String description) {
+        log(eventType, component, "[" + vehicleId + "] " + description);
+    }
+    
+    /**
+     * Logs an error event.
+     */
+    public void logError(String component, String description, Exception e) {
+        String fullDescription = description + (e != null ? ": " + e.getMessage() : "");
+        log(EventType.ERROR, component, fullDescription);
+    }
+    
+    /**
+     * Background thread that writes log entries to file.
+     */
+    private void processLogQueue() {
+        while (running.get() || !logQueue.isEmpty()) {
+            try {
+                LogEntry entry = logQueue.poll(100, java.util.concurrent.TimeUnit.MILLISECONDS);
+                if (entry != null) {
+                    writeEntry(entry);
+                }
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                break;
+            }
+        }
+        
+        // Flush remaining entries
+        while (!logQueue.isEmpty()) {
+            LogEntry entry = logQueue.poll();
+            if (entry != null) {
+                writeEntry(entry);
+            }
+        }
+    }
+    
+    /**
+     * Writes a single log entry to file.
+     */
+    private void writeEntry(LogEntry entry) {
+        String timestamp = timestampFormat.format(new Date(entry.timestampMillis));
+        double relativeTime = (entry.timestampMillis - simulationStartMillis) / 1000.0;
+        
+        writer.printf("%-23s | %8.3fs | %-20s | %-15s | %s\n",
+            timestamp,
+            relativeTime,
+            entry.eventType.toString(),
+            truncate(entry.component, 15),
+            entry.description
+        );
+        
+        // Flush periodically for real-time viewing
+        if (logQueue.size() < 10) {
+            writer.flush();
+        }
+    }
+    
+    private String truncate(String str, int maxLength) {
+        if (str == null) return "";
+        return str.length() <= maxLength ? str : str.substring(0, maxLength);
+    }
+    
+    /**
+     * Shuts down the logger and flushes all pending entries.
+     */
+    public void shutdown() {
+        if (!running.compareAndSet(true, false)) {
+            return;  // Already shut down
+        }
+        
+        try {
+            // Wait for writer thread to finish
+            writerThread.join(5000);  // Wait up to 5 seconds
+            
+            // Write footer
+            writer.println();
+            writer.println("-".repeat(80));
+            writer.println("SIMULATION ENDED");
+            writer.println("Ended: " + timestampFormat.format(new Date()));
+            writer.println("=".repeat(80));
+            
+            writer.close();
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+        }
+    }
+    
+    /**
+     * Internal class to represent a log entry.
+     */
+    private static class LogEntry {
+        final long timestampMillis;
+        final EventType eventType;
+        final String component;
+        final String description;
+        
+        LogEntry(long timestampMillis, EventType eventType, String component, String description) {
+            this.timestampMillis = timestampMillis;
+            this.eventType = eventType;
+            this.component = component;
+            this.description = description;
+        }
+    }
+}

main/src/main/java/sd/logging/EventType.java

@@ -0,0 +1,48 @@
+package sd.logging;
+
+/**
+ * Tipos de eventos que podem ocorrer na simulação.
+ * Usados para categorizar e filtrar logs.
+ */
+public enum EventType {
+    VEHICLE_GENERATED("Vehicle Generated"),
+    VEHICLE_ARRIVED("Vehicle Arrived"),
+    VEHICLE_QUEUED("Vehicle Queued"),
+    VEHICLE_DEPARTED("Vehicle Departed"),
+    VEHICLE_EXITED("Vehicle Exited"),
+    
+    LIGHT_CHANGED_GREEN("Light Changed to Green"),
+    LIGHT_CHANGED_RED("Light Changed to Red"),
+    LIGHT_REQUEST_GREEN("Light Requested Green"),
+    LIGHT_RELEASE_GREEN("Light Released Green"),
+    
+    SIMULATION_STARTED("Simulation Started"),
+    SIMULATION_STOPPED("Simulation Stopped"),
+    PROCESS_STARTED("Process Started"),
+    PROCESS_STOPPED("Process Stopped"),
+    
+    STATS_UPDATE("Statistics Update"),
+    CONFIG_CHANGED("Configuration Changed"),
+    
+    CONNECTION_ESTABLISHED("Connection Established"),
+    CONNECTION_LOST("Connection Lost"),
+    MESSAGE_SENT("Message Sent"),
+    MESSAGE_RECEIVED("Message Received"),
+    
+    ERROR("Error");
+    
+    private final String displayName;
+    
+    EventType(String displayName) {
+        this.displayName = displayName;
+    }
+    
+    public String getDisplayName() {
+        return displayName;
+    }
+    
+    @Override
+    public String toString() {
+        return displayName;
+    }
+}

main/src/main/java/sd/logging/VehicleTracer.java

@@ -0,0 +1,331 @@
+package sd.logging;
+
+import java.io.BufferedWriter;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import sd.model.Vehicle;
+
+/**
+ * Rastreia e regista a viagem completa de veículos individuais.
+ * 
+ * <p>Cria ficheiros de trace detalhados com:
+ * <ul>
+ * <li>Timestamps de todos os eventos
+ * <li>Localizações (interseções)
+ * <li>Tempos de espera em cada semáforo
+ * <li>Tempos de travessia
+ * <li>Tempo total no sistema
+ * </ul>
+ */
+public class VehicleTracer {
+    
+    private static VehicleTracer instance;
+    private static final Object instanceLock = new Object();
+    
+    private final Map<String, VehicleTrace> trackedVehicles;
+    private final SimpleDateFormat timestampFormat;
+    private final long simulationStartMillis;
+    private final String traceDirectory;
+    
+    /** Construtor privado (singleton) */
+    private VehicleTracer(String traceDirectory) {
+        this.trackedVehicles = new ConcurrentHashMap<>();
+        this.timestampFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
+        this.simulationStartMillis = System.currentTimeMillis();
+        this.traceDirectory = traceDirectory;
+        
+        try {
+            java.nio.file.Files.createDirectories(java.nio.file.Paths.get(traceDirectory));
+        } catch (IOException e) {
+            System.err.println("Failed to create trace directory: " + e.getMessage());
+        }
+    }
+    
+    /** Obtém ou cria a instância singleton */
+    public static VehicleTracer getInstance() {
+        if (instance == null) {
+            synchronized (instanceLock) {
+                if (instance == null) {
+                    instance = new VehicleTracer("logs/traces");
+                }
+            }
+        }
+        return instance;
+    }
+    
+    /** Inicializa com diretório de trace customizado */
+    public static void initialize(String traceDirectory) {
+        synchronized (instanceLock) {
+            if (instance != null) {
+                instance.shutdown();
+            }
+            instance = new VehicleTracer(traceDirectory);
+        }
+    }
+    
+    /**
+     * Começa a rastrear um veículo específico.
+     * Cria ficheiro de trace para este veículo.
+     */
+    public void startTracking(String vehicleId) {
+        if (trackedVehicles.containsKey(vehicleId)) {
+            return;  // Already tracking
+        }
+        
+        VehicleTrace trace = new VehicleTrace(vehicleId, traceDirectory);
+        trackedVehicles.put(vehicleId, trace);
+        
+        trace.logEvent("TRACKING_STARTED", "", "Started tracking vehicle " + vehicleId);
+    }
+    
+    /**
+     * Stops tracking a vehicle and closes its trace file.
+     */
+    public void stopTracking(String vehicleId) {
+        VehicleTrace trace = trackedVehicles.remove(vehicleId);
+        if (trace != null) {
+            trace.logEvent("TRACKING_STOPPED", "", "Stopped tracking vehicle " + vehicleId);
+            trace.close();
+        }
+    }
+    
+    /**
+     * Checks if a vehicle is being tracked.
+     */
+    public boolean isTracking(String vehicleId) {
+        return trackedVehicles.containsKey(vehicleId);
+    }
+    
+    /**
+     * Logs when a vehicle is generated.
+     */
+    public void logGenerated(Vehicle vehicle) {
+        if (!isTracking(vehicle.getId())) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicle.getId());
+        if (trace != null) {
+            trace.logEvent("GENERATED", "Coordinator", 
+                String.format("Type: %s, Entry Time: %.2fs, Route: %s", 
+                    vehicle.getType(), vehicle.getEntryTime(), vehicle.getRoute()));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle arrives at an intersection.
+     */
+    public void logArrival(String vehicleId, String intersection, double simulationTime) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("ARRIVED", intersection, 
+                String.format("Arrived at %s (sim time: %.2fs)", intersection, simulationTime));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle is queued at a traffic light.
+     */
+    public void logQueued(String vehicleId, String intersection, String direction, int queuePosition) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("QUEUED", intersection, 
+                String.format("Queued at %s-%s (position: %d)", intersection, direction, queuePosition));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle starts waiting at a red light.
+     */
+    public void logWaitingStart(String vehicleId, String intersection, String direction) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("WAITING_START", intersection, 
+                String.format("Started waiting at %s-%s (light is RED)", intersection, direction));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle finishes waiting (light turns green).
+     */
+    public void logWaitingEnd(String vehicleId, String intersection, String direction, double waitTime) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("WAITING_END", intersection, 
+                String.format("Finished waiting at %s-%s (waited %.2fs)", intersection, direction, waitTime));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle starts crossing an intersection.
+     */
+    public void logCrossingStart(String vehicleId, String intersection, String direction) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("CROSSING_START", intersection, 
+                String.format("Started crossing %s-%s (light is GREEN)", intersection, direction));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle finishes crossing an intersection.
+     */
+    public void logCrossingEnd(String vehicleId, String intersection, double crossingTime) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("CROSSING_END", intersection, 
+                String.format("Finished crossing %s (took %.2fs)", intersection, crossingTime));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle departs from an intersection.
+     */
+    public void logDeparture(String vehicleId, String intersection, String nextDestination) {
+        if (!isTracking(vehicleId)) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicleId);
+        if (trace != null) {
+            trace.logEvent("DEPARTED", intersection, 
+                String.format("Departed from %s toward %s", intersection, nextDestination));
+        }
+    }
+    
+    /**
+     * Logs when a vehicle exits the system.
+     */
+    public void logExit(Vehicle vehicle, double systemTime) {
+        if (!isTracking(vehicle.getId())) return;
+        
+        VehicleTrace trace = trackedVehicles.get(vehicle.getId());
+        if (trace != null) {
+            trace.logEvent("EXITED", "Exit Node", 
+                String.format("Exited system - Total time: %.2fs, Waiting: %.2fs, Crossing: %.2fs", 
+                    systemTime, vehicle.getTotalWaitingTime(), vehicle.getTotalCrossingTime()));
+            
+            // Write summary
+            trace.writeSummary(vehicle, systemTime);
+            
+            // Stop tracking and close file
+            stopTracking(vehicle.getId());
+        }
+    }
+    
+    /**
+     * Shuts down the tracer and closes all trace files.
+     */
+    public void shutdown() {
+        for (VehicleTrace trace : trackedVehicles.values()) {
+            trace.close();
+        }
+        trackedVehicles.clear();
+    }
+    
+    /**
+     * Internal class to handle tracing for a single vehicle.
+     */
+    private class VehicleTrace {
+        private final String vehicleId;
+        private final PrintWriter writer;
+        private final long traceStartMillis;
+        
+        VehicleTrace(String vehicleId, String directory) {
+            this.vehicleId = vehicleId;
+            this.traceStartMillis = System.currentTimeMillis();
+            
+            PrintWriter w = null;
+            try {
+                String filename = String.format("%s/vehicle-%s.trace", directory, vehicleId);
+                w = new PrintWriter(new BufferedWriter(new FileWriter(filename, false)), true);
+                
+                // Write header
+                w.println("=".repeat(80));
+                w.println("VEHICLE TRACE: " + vehicleId);
+                w.println("Trace Started: " + timestampFormat.format(new Date()));
+                w.println("=".repeat(80));
+                w.println();
+                w.printf("%-23s | %-8s | %-15s | %-15s | %s\n", 
+                    "TIMESTAMP", "REL_TIME", "EVENT", "LOCATION", "DESCRIPTION");
+                w.println("-".repeat(80));
+                
+            } catch (IOException e) {
+                System.err.println("Failed to create trace file for " + vehicleId + ": " + e.getMessage());
+            }
+            
+            this.writer = w;
+        }
+        
+        void logEvent(String eventType, String location, String description) {
+            if (writer == null) return;
+            
+            long now = System.currentTimeMillis();
+            String timestamp = timestampFormat.format(new Date(now));
+            double relativeTime = (now - traceStartMillis) / 1000.0;
+            
+            writer.printf("%-23s | %8.3fs | %-15s | %-15s | %s\n",
+                timestamp,
+                relativeTime,
+                truncate(eventType, 15),
+                truncate(location, 15),
+                description
+            );
+            writer.flush();
+        }
+        
+        void writeSummary(Vehicle vehicle, double systemTime) {
+            if (writer == null) return;
+            
+            writer.println();
+            writer.println("=".repeat(80));
+            writer.println("JOURNEY SUMMARY");
+            writer.println("=".repeat(80));
+            writer.println("Vehicle ID: " + vehicle.getId());
+            writer.println("Vehicle Type: " + vehicle.getType());
+            writer.println("Route: " + vehicle.getRoute());
+            writer.println();
+            writer.printf("Entry Time: %.2f seconds\n", vehicle.getEntryTime());
+            writer.printf("Total System Time: %.2f seconds\n", systemTime);
+            writer.printf("Total Waiting Time: %.2f seconds (%.1f%%)\n", 
+                vehicle.getTotalWaitingTime(), 
+                100.0 * vehicle.getTotalWaitingTime() / systemTime);
+            writer.printf("Total Crossing Time: %.2f seconds (%.1f%%)\n", 
+                vehicle.getTotalCrossingTime(),
+                100.0 * vehicle.getTotalCrossingTime() / systemTime);
+            writer.printf("Travel Time: %.2f seconds (%.1f%%)\n",
+                systemTime - vehicle.getTotalWaitingTime() - vehicle.getTotalCrossingTime(),
+                100.0 * (systemTime - vehicle.getTotalWaitingTime() - vehicle.getTotalCrossingTime()) / systemTime);
+            writer.println("=".repeat(80));
+        }
+        
+        void close() {
+            if (writer != null) {
+                writer.println();
+                writer.println("-".repeat(80));
+                writer.println("END OF TRACE");
+                writer.println("=".repeat(80));
+                writer.close();
+            }
+        }
+        
+        private String truncate(String str, int maxLength) {
+            if (str == null) return "";
+            return str.length() <= maxLength ? str : str.substring(0, maxLength);
+        }
+    }
+}

main/src/main/java/sd/model/Event.java

@@ -1,131 +0,0 @@
-package sd.model;
-
-import java.io.Serializable;
-
-/**
- * Represents a single event in the discrete event simulation.
- * * An Event is the fundamental unit of action in the simulation. It contains:
- * - A {@code timestamp} (when the event should occur).
- * - A {@link EventType} (what kind of event it is).
- * - Associated {@code data} (e.g., the {@link Vehicle} or {@link TrafficLight} involved).
- * - An optional {@code location} (e.g., the ID of the {@link Intersection}).
- * * Events are {@link Comparable}, allowing them to be sorted in a
- * {@link java.util.PriorityQueue}. The primary sorting key is the
- * {@code timestamp}. If timestamps are equal, {@code EventType} is used
- * as a tie-breaker to ensure a consistent, deterministic order.
- * * Implements {@link Serializable} so events could (in theory) be sent
- * across a network in a distributed simulation.
- */
-public class Event implements Comparable<Event>, Serializable {
-    private static final long serialVersionUID = 1L;
-    
-    /**
-     * The simulation time (in seconds) when this event is scheduled to occur.
-     */
-    private final double timestamp;
-    
-    /**
-     * The type of event (e.g., VEHICLE_ARRIVAL, TRAFFIC_LIGHT_CHANGE).
-     */
-    private final EventType type;
-    
-    /**
-     * The data payload associated with this event.
-     * This could be a {@link Vehicle}, {@link TrafficLight}, or null.
-     */
-    private final Object data;
-    
-    /**
-     * The ID of the location where the event occurs (e.g., "Cr1").
-     * Can be null if the event is not location-specific (like VEHICLE_GENERATION).
-     */
-    private final String location;
-    
-    /**
-     * Constructs a new Event.
-     *
-     * @param timestamp The simulation time when the event occurs.
-     * @param type The {@link EventType} of the event.
-     * @param data The associated data (e.g., a Vehicle object).
-     * @param location The ID of the location (e.g., an Intersection ID).
-     */
-    public Event(double timestamp, EventType type, Object data, String location) {
-        this.timestamp = timestamp;
-        this.type = type;
-        this.data = data;
-        this.location = location;
-    }
-    
-    /**
-     * Convenience constructor for an Event without a specific location.
-     *
-     * @param timestamp The simulation time when the event occurs.
-     * @param type The {@link EventType} of the event.
-     * @param data The associated data (e.g., a Vehicle object).
-     */
-    public Event(double timestamp, EventType type, Object data) {
-        this(timestamp, type, data, null);
-    }
-    
-    /**
-     * Compares this event to another event for ordering.
-     * * Events are ordered primarily by {@link #timestamp} (ascending).
-     * If timestamps are identical, they are ordered by {@link #type} (alphabetical)
-     * to provide a stable, deterministic tie-breaking mechanism.
-     *
-     * @param other The other Event to compare against.
-     * @return A negative integer if this event comes before {@code other},
-     * zero if they are "equal" in sorting (though this is rare),
-     * or a positive integer if this event comes after {@code other}.
-     */
-    @Override
-    public int compareTo(Event other) {
-        // Primary sort: timestamp (earlier events come first)
-        int cmp = Double.compare(this.timestamp, other.timestamp);
-        if (cmp == 0) {
-            // Tie-breaker: event type (ensures deterministic order)
-            return this.type.compareTo(other.type);
-        }
-        return cmp;
-    }
-    
-    // --- Getters ---
-    
-    /**
-     * @return The simulation time when the event occurs.
-     */
-    public double getTimestamp() {
-        return timestamp;
-    }
-    
-    /**
-     * @return The {@link EventType} of the event.
-     */
-    public EventType getType() {
-        return type;
-    }
-    
-    /**
-     * @return The data payload (e.g., {@link Vehicle}, {@link TrafficLight}).
-     * The caller must cast this to the expected type.
-     */
-    public Object getData() {
-        return data;
-    }
-    
-    /**
-     * @return The location ID (e.g., "Cr1"), or null if not applicable.
-     */
-    public String getLocation() {
-        return location;
-    }
-    
-    /**
-     * @return A string representation of the event for logging.
-     */
-    @Override
-    public String toString() {
-        return String.format("Event{t=%.2f, type=%s, loc=%s}", 
-                           timestamp, type, location);
-    }
-}

main/src/main/java/sd/model/EventType.java

@@ -1,45 +0,0 @@
-package sd.model;
-
-/**
- * Enumeration representing all possible event types in the discrete event simulation.
- * These types are used by the {@link sd.engine.SimulationEngine} to determine
- * how to process a given {@link Event}.
- */
-public enum EventType {
-    
-    /**
-     * Fired when a {@link Vehicle} arrives at an {@link Intersection}.
-     * Data: {@link Vehicle}, Location: Intersection ID
-     */
-    VEHICLE_ARRIVAL,
-    
-    /**
-     * Fired when a {@link TrafficLight} is scheduled to change its state.
-     * Data: {@link TrafficLight}, Location: Intersection ID
-     */
-    TRAFFIC_LIGHT_CHANGE,
-    
-    /**
-     * Fired when a {@link Vehicle} begins to cross an {@link Intersection}.
-     * Data: {@link Vehicle}, Location: Intersection ID
-     */
-    CROSSING_START,
-    
-    /**
-     * Fired when a {@link Vehicle} finishes crossing an {@link Intersection}.
-     * Data: {@link Vehicle}, Location: Intersection ID
-     */
-    CROSSING_END,
-    
-    /**
-     * Fired when a new {@link Vehicle} should be created and added to the system.
-     * Data: null, Location: null
-     */
-    VEHICLE_GENERATION,
-    
-    /**
-     * Fired periodically to trigger the printing or sending of simulation statistics.
-     * Data: null, Location: null
-     */
-    STATISTICS_UPDATE
-}

main/src/main/java/sd/model/Intersection.java

@@ -6,65 +6,51 @@ import java.util.List;
 import java.util.Map;
 
 /**
- * Represents an intersection in the traffic simulation.
+ * Representa uma interseção na simulação de tráfego.
- * * An Intersection acts as a central hub. It does not control logic itself,
+ * 
- * but it *owns* and *manages* a set of {@link TrafficLight} objects.
+ * <p>Uma interseção funciona como um nó central da rede. Não controla lógica diretamente,
- * * Its primary responsibilities are:
+ * mas gere um conjunto de semáforos ({@link TrafficLight}).</p>
- * 1.  Holding a {@link TrafficLight} for each direction ("North", "East", etc.).
+ * 
- * 2.  Maintaining a {@code routing} table that maps a vehicle's *next*
+ * <p>Responsabilidades principais:</p>
- * destination (e.g., "Cr3") to a specific *direction* at *this*
+ * <ul>
- * intersection (e.g., "East").
+ *   <li>Manter um {@link TrafficLight} para cada direção (Norte, Este, etc.)</li>
- * 3.  Receiving incoming vehicles and placing them in the correct
+ *   <li>Gerir uma tabela de encaminhamento que mapeia destinos para direções</li>
- * traffic light's queue based on the routing table.
+ *   <li>Receber veículos e colocá-los na fila do semáforo correto</li>
- * 4.  Tracking aggregate statistics for all traffic passing through it.
+ *   <li>Acompanhar estatísticas agregadas do tráfego</li>
+ * </ul>
  */
 public class Intersection {
 
-    // --- Identity and configuration ---
+    /** Identificador único da interseção (ex: "Cr1", "Cr2") */
-    
-    /**
-     * Unique identifier for the intersection (e.g., "Cr1", "Cr2").
-     */
     private final String id;
     
     /**
-     * A map holding all traffic lights managed by this intersection.
+     * Mapa com todos os semáforos desta interseção.
-     * Key: Direction (String, e.g., "North", "East").
+     * Chave: Direção (String, ex: "Norte", "Este")
-     * Value: The {@link TrafficLight} object for that direction.
+     * Valor: Objeto {@link TrafficLight} correspondente
      */
     private final Map<String, TrafficLight> trafficLights;
     
     /**
-     * The routing table for this intersection.
+     * Tabela de encaminhamento da interseção.
-     * Key: The *next* destination ID (String, e.g., "Cr3", "S" for exit).
+     * Chave: Próximo destino (String, ex: "Cr3", "S" para saída)
-     * Value: The *direction* (String, e.g., "East") a vehicle must take
+     * Valor: Direção que o veículo deve tomar nesta interseção
-     * at *this* intersection to reach that destination.
      */
     private final Map<String, String> routing;
-
+    /** Número total de veículos recebidos por esta interseção */
-    // --- Statistics ---
-    
-    /**
-     * Total number of vehicles that have been received by this intersection.
-     */
     private int totalVehiclesReceived;
     
-    /**
+    /** Número total de veículos que partiram desta interseção */
-     * Total number of vehicles that have successfully passed through (sent from) this intersection.
-     */
     private int totalVehiclesSent;
     
-    /**
+    /** Média acumulada do tempo de espera dos veículos nesta interseção */
-     * A running average of the waiting time for vehicles at this intersection.
-     * Note: This calculation might be simplified.
-     */
     private double averageWaitingTime;
 
     /**
-     * Constructs a new Intersection with a given ID.
+     * Cria uma nova interseção.
-     * Initializes empty maps for traffic lights and routing.
+     * Inicializa mapas vazios para semáforos e encaminhamento.
      *
-     * @param id The unique identifier for this intersection (e.g., "Cr1").
+     * @param id identificador único da interseção (ex: "Cr1")
      */
     public Intersection(String id) {
         this.id = id;
@@ -76,49 +62,56 @@ public class Intersection {
     }
 
     /**
-     * Registers a new {@link TrafficLight} with this intersection.
+     * Regista um novo semáforo nesta interseção.
-     * The light is mapped by its direction.
+     * O semáforo é mapeado pela sua direção.
      *
-     * @param trafficLight The {@link TrafficLight} object to add.
+     * @param trafficLight o semáforo a adicionar
      */
     public void addTrafficLight(TrafficLight trafficLight) {
         trafficLights.put(trafficLight.getDirection(), trafficLight);
     }
 
     /**
-     * Defines a routing rule for this intersection.
+     * Define uma regra de encaminhamento para esta interseção.
-     * * This method builds the routing table. For example, calling
-     * {@code configureRoute("Cr3", "East")} means "Any vehicle
-     * arriving here whose next destination is 'Cr3' should be sent to
-     * the 'East' traffic light queue."
      * 
-     * @param nextDestination The ID of the *next* intersection or exit (e.g., "Cr3", "S").
+     * <p>Por exemplo, {@code configureRoute("Cr3", "Este")} significa:
-     * @param direction       The direction (and thus, the traffic light)
+     * "Qualquer veículo que chegue aqui com destino 'Cr3' deve ser enviado
-     * at *this* intersection to use (e.g., "East").
+     * para a fila do semáforo da direção Este."</p>
+     *
+     * @param nextDestination ID da próxima interseção ou saída (ex: "Cr3", "S")
+     * @param direction direção (e respetivo semáforo) a usar nesta interseção
      */
     public void configureRoute(String nextDestination, String direction) {
         routing.put(nextDestination, direction);
     }
 
     /**
-     * Accepts an incoming vehicle and places it in the correct queue.
+     * Recebe um novo veículo e coloca-o na fila do semáforo apropriado.
-     * * This method:
+     * A direção é escolhida com base na tabela de encaminhamento.
-     * 1. Increments the {@link #totalVehiclesReceived} counter.
-     * 2. Gets the vehicle's *next* destination (from {@link Vehicle#getCurrentDestination()}).
-     * 3. Uses the {@link #routing} map to find the correct *direction* for that destination.
-     * 4. Adds the vehicle to the queue of the {@link TrafficLight} for that direction.
      * 
-     * @param vehicle The {@link Vehicle} arriving at the intersection.
+     * @param vehicle o veículo que está a chegar a esta interseção
+     * @param simulationTime o tempo de simulação atual (em segundos)
      */
-    public void receiveVehicle(Vehicle vehicle) {
+    public void receiveVehicle(Vehicle vehicle, double simulationTime) {
         totalVehiclesReceived++;
 
+        // Note: Route advancement is handled by SimulationEngine.handleVehicleArrival()
+        // before calling this method, so we don't advance here.
+        
         String nextDestination = vehicle.getCurrentDestination();
+        
+        // Check if vehicle reached final destination
+        if (nextDestination == null) {
+            System.out.printf("[%s] Vehicle %s reached final destination%n", 
+                this.id, vehicle.getId());
+            return;
+        }
+        
         String direction = routing.get(nextDestination);
 
         if (direction != null && trafficLights.containsKey(direction)) {
             // Found a valid route and light, add vehicle to the queue
-            trafficLights.get(direction).addVehicle(vehicle);
+            trafficLights.get(direction).addVehicle(vehicle, simulationTime);
         } else {
             // Routing error: No rule for this destination or no light for that direction
             System.err.printf(
@@ -126,108 +119,100 @@ public class Intersection {
                 this.id, vehicle.getId(), nextDestination, direction
             );
         }
+    }    /**
+     * Retorna a direção que um veículo deve tomar para alcançar um destino.
+     *
+     * @param destination o próximo destino (ex: "Cr3", "S")
+     * @return a direção (ex: "Este"), ou null se não houver rota configurada
+     */
+    public String getDirectionForDestination(String destination) {
+        return routing.get(destination);
     }
 
     /**
-     * Returns the traffic light controlling the given direction.
+     * Retorna o semáforo que controla uma determinada direção.
      *
-     * @param direction The direction (e.g., "North").
+     * @param direction a direção (ex: "Norte")
-     * @return The {@link TrafficLight} object, or null if no light exists
+     * @return o objeto {@link TrafficLight}, ou null se não existir
-     * for that direction.
      */
     public TrafficLight getTrafficLight(String direction) {
         return trafficLights.get(direction);
     }
 
     /**
-     * Returns a list of all traffic lights managed by this intersection.
+     * Retorna uma lista com todos os semáforos desta interseção.
      *
-     * @return A new {@link List} containing all {@link TrafficLight} objects.
+     * @return uma nova {@link List} com todos os semáforos
      */
     public List<TrafficLight> getTrafficLights() {
-        // Return a copy to prevent external modification of the internal map's values
         return new ArrayList<>(trafficLights.values());
     }
 
     /**
-     * Returns the total number of vehicles currently queued across *all*
+     * Retorna o número total de veículos em fila em todos os semáforos.
-     * traffic lights at this intersection.
+     * Usa Java Stream API para somar os tamanhos de todas as filas.
      *
-     * @return The sum of all queue sizes.
+     * @return a soma dos tamanhos de todas as filas
      */
     public int getTotalQueueSize() {
-        // Uses Java Stream API:
-        // 1. trafficLights.values().stream() - Get a stream of TrafficLight objects
-        // 2. .mapToInt(TrafficLight::getQueueSize) - Convert each light to its queue size (an int)
-        // 3. .sum() - Sum all the integers
         return trafficLights.values().stream()
                 .mapToInt(TrafficLight::getQueueSize)
                 .sum();
     }
 
-    // --- Stats and getters ---
-
     /**
-     * @return The unique ID of this intersection.
+     * @return o identificador único desta interseção
      */
     public String getId() {
         return id;
     }
 
     /**
-     * @return The total number of vehicles that have arrived at this intersection.
+     * @return o número total de veículos que chegaram a esta interseção
      */
     public int getTotalVehiclesReceived() {
         return totalVehiclesReceived;
     }
 
     /**
-     * @return The total number of vehicles that have successfully
+     * @return o número total de veículos que partiram desta interseção
-     * departed from this intersection.
      */
     public int getTotalVehiclesSent() {
         return totalVehiclesSent;
     }
 
     /**
-     * Increments the counter for vehicles that have successfully departed.
+     * Incrementa o contador de veículos que partiram com sucesso.
-     * This is typically called by the {@link sd.engine.SimulationEngine}
+     * Tipicamente chamado após um veículo completar a travessia.
-     * after a vehicle finishes crossing.
      */
     public void incrementVehiclesSent() {
         totalVehiclesSent++;
     }
 
     /**
-     * @return The running average of vehicle waiting time at this intersection.
+     * @return a média do tempo de espera dos veículos nesta interseção
      */
     public double getAverageWaitingTime() {
         return averageWaitingTime;
     }
 
     /**
-     * Updates the running average waiting time with a new sample (a new
+     * Atualiza a média do tempo de espera com uma nova amostra.
-     * vehicle's wait time).
+     * Usa a fórmula: Nova Média = (Média Antiga * (N-1) + Novo Valor) / N
-     * * Uses an incremental/weighted average formula:
-     * NewAvg = (OldAvg * (N-1) + NewValue) / N
-     * where N is the total number of vehicles sent.
      *
-     * @param newTime The waiting time (in seconds) of the vehicle that just
+     * @param newTime tempo de espera (em segundos) do veículo que acabou de partir
-     * departed.
      */
     public void updateAverageWaitingTime(double newTime) {
-        // Avoid division by zero if this is called before any vehicle is sent
         if (totalVehiclesSent > 0) {
             averageWaitingTime = (averageWaitingTime * (totalVehiclesSent - 1) + newTime)
                                / totalVehiclesSent;
         } else if (totalVehiclesSent == 1) {
-             // This is the first vehicle
             averageWaitingTime = newTime;
         }
     }
 
     /**
-     * @return A string summary of the intersection's current state.
+     * @return representação textual do estado atual da interseção
      */
     @Override
     public String toString() {

main/src/main/java/sd/model/Message.java

@@ -1,55 +1,45 @@
 package sd.model;
 
-import java.io.Serializable;
 import java.util.UUID;
 
+import sd.protocol.MessageProtocol;
+
 /**
- * Represents a message exchanged between processes in the distributed simulation.
+ * Representa uma mensagem trocada entre processos na simulação distribuída.
- * Each message has a unique ID, a type, a sender, a destination, and a payload.
+ * 
- * This class implements {@link Serializable} to allow transmission over the network.
+ * <p>Cada mensagem tem um ID único, tipo, remetente, destino e payload.
+ * Implementa {@link MessageProtocol} que estende Serializable para transmissão pela rede.</p>
  */
-public class Message implements Serializable {
+public class Message implements MessageProtocol {
     
     private static final long serialVersionUID = 1L;
     
-    /**
+    /** Identificador único desta mensagem */
-     * Unique identifier for this message.
-     */
     private final String messageId;
     
-    /**
+    /** Tipo desta mensagem (ex: VEHICLE_TRANSFER, STATS_UPDATE) */
-     * The type of this message (e.g., VEHICLE_TRANSFER, STATS_UPDATE).
-     */
     private final MessageType type;
     
-    /**
+    /** Identificador do processo que enviou esta mensagem */
-     * Identifier of the process that sent this message.
-     */
     private final String senderId;
     
-    /**
+    /** Identificador do processo de destino (pode ser null para broadcast) */
-     * Identifier of the destination process. Can be null for broadcast messages.
-     */
     private final String destinationId;
     
-    /**
+    /** Dados a serem transmitidos (o tipo depende do tipo de mensagem) */
-     * The actual data being transmitted. Type depends on the message type.
-     */
     private final Object payload;
     
-    /**
+    /** Timestamp de criação da mensagem (tempo de simulação ou real) */
-     * Timestamp when this message was created (simulation time or real time).
-     */
     private final long timestamp;
     
     /**
-     * Creates a new message with all parameters.
+     * Cria uma nova mensagem com todos os parâmetros.
      *
-     * @param type The message type
+     * @param type tipo da mensagem
-     * @param senderId The ID of the sending process
+     * @param senderId ID do processo remetente
-     * @param destinationId The ID of the destination process (null for broadcast)
+     * @param destinationId ID do processo de destino (null para broadcast)
-     * @param payload The message payload
+     * @param payload conteúdo da mensagem
-     * @param timestamp The timestamp of message creation
+     * @param timestamp timestamp de criação da mensagem
      */
     public Message(MessageType type, String senderId, String destinationId, 
                    Object payload, long timestamp) {
@@ -62,23 +52,23 @@ public class Message implements Serializable {
     }
     
     /**
-     * Creates a new message with current system time as timestamp.
+     * Cria uma nova mensagem usando o tempo atual do sistema como timestamp.
      *
-     * @param type The message type
+     * @param type tipo da mensagem
-     * @param senderId The ID of the sending process
+     * @param senderId ID do processo remetente
-     * @param destinationId The ID of the destination process
+     * @param destinationId ID do processo de destino
-     * @param payload The message payload
+     * @param payload conteúdo da mensagem
      */
     public Message(MessageType type, String senderId, String destinationId, Object payload) {
         this(type, senderId, destinationId, payload, System.currentTimeMillis());
     }
     
     /**
-     * Creates a broadcast message (no specific destination).
+     * Cria uma mensagem de broadcast (sem destino específico).
      *
-     * @param type The message type
+     * @param type tipo da mensagem
-     * @param senderId The ID of the sending process
+     * @param senderId ID do processo remetente
-     * @param payload The message payload
+     * @param payload conteúdo da mensagem
      */
     public Message(MessageType type, String senderId, Object payload) {
         this(type, senderId, null, payload, System.currentTimeMillis());
@@ -132,6 +122,17 @@ public class Message implements Serializable {
         return (T) payload;
     }
     
+    // Impl MessageProtocol interface
+    @Override
+    public String getSourceNode() {
+        return senderId;
+    }
+    
+    @Override
+    public String getDestinationNode() {
+        return destinationId;
+    }
+    
     @Override
     public String toString() {
         return String.format("Message[id=%s, type=%s, from=%s, to=%s, timestamp=%d]",

main/src/main/java/sd/model/MessageType.java

@@ -1,81 +1,49 @@
 package sd.model;
 
 /**
- * Enumeration representing all possible message types for distributed communication.
+ * Enumeração que representa todos os tipos de mensagens possíveis para
- * These types are used for inter-process communication between different components
+ * comunicação distribuída.
- * of the distributed traffic simulation system.
+ * Estes tipos são usados para a comunicação entre processos dos diferentes
+ * componentes
+ * do sistema de simulação de tráfego distribuído.
  */
 public enum MessageType {
 
     /**
-     * Message to transfer a vehicle between intersections or processes.
+     * Mensagem para transferir um veículo entre interseções ou processos.
-     * Payload: Vehicle object with current state
+     * Payload: Objeto Vehicle com o estado atual
      */
     VEHICLE_TRANSFER,
 
     /**
-     * Message to update statistics across the distributed system.
+     * Mensagem para atualizar estatísticas em todo o sistema distribuído.
-     * Payload: Statistics data (waiting times, queue sizes, etc.)
+     * Payload: Dados estatísticos (tempos de espera, tamanhos de fila, etc.)
      */
     STATS_UPDATE,
 
     /**
-     * Message to synchronize traffic light states between processes.
+     * Mensagem para sincronizar a hora de início da simulação em todos os
-     * Payload: TrafficLight state and timing information
+     * processos.
+     * Payload: Timestamp de início (long milissegundos)
      */
-    TRAFFIC_LIGHT_SYNC,
+    SIMULATION_START,
 
     /**
-     * Heartbeat message to check if a process is alive.
+     * Mensagem para notificar sobre a geração de um novo veículo.
-     * Payload: Process ID and timestamp
+     * Payload: Parâmetros de geração do veículo
-     */
-    HEARTBEAT,
-    
-    /**
-     * Request to join the distributed simulation.
-     * Payload: Process information and capabilities
-     */
-    JOIN_REQUEST,
-    
-    /**
-     * Response to a join request.
-     * Payload: Acceptance status and configuration
-     */
-    JOIN_RESPONSE,
-    
-    /**
-     * Message to notify about a new vehicle generation.
-     * Payload: Vehicle generation parameters
      */
     VEHICLE_SPAWN,
 
     /**
-     * Message to request the current state of an intersection.
+     * Mensagem para sinalizar o encerramento de um processo.
-     * Payload: Intersection ID
+     * Payload: ID do processo e motivo
-     */
-    STATE_REQUEST,
-    
-    /**
-     * Response containing the current state of an intersection.
-     * Payload: Complete intersection state
-     */
-    STATE_RESPONSE,
-    
-    /**
-     * Message to signal shutdown of a process.
-     * Payload: Process ID and reason
      */
     SHUTDOWN,
 
     /**
-     * Acknowledgment message for reliable communication.
+     * Mensagem para alterar a política de roteamento durante a simulação.
-     * Payload: Message ID being acknowledged
+     * Payload: String com o nome da nova política (RANDOM, SHORTEST_PATH, LEAST_CONGESTED)
      */
-    ACK,
+    ROUTING_POLICY_CHANGE,
 
-    /**
-     * Error message to report problems in the distributed system.
-     * Payload: Error description and context
-     */
-    ERROR
 }

main/src/main/java/sd/model/TrafficLight.java

@@ -1,315 +1,269 @@
 package sd.model;
 
+import java.util.HashMap;
 import java.util.LinkedList;
+import java.util.Map;
 import java.util.Queue;
 import java.util.concurrent.locks.Condition;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 
 /**
- * Represents a single traffic light controlling one direction at an intersection.
+ * Representa um semáforo numa interseção.
- * * Each light maintains its own queue of {@link Vehicle} objects and
+ * 
- * alternates between {@link TrafficLightState#GREEN} and
+ * <p>Cada semáforo controla uma direção específica e mantém uma fila de veículos à espera.
- * {@link TrafficLightState#RED} states.
+ * Alterna entre os estados VERDE e VERMELHO de acordo com a temporização configurada.</p>
- * * This class is designed to be thread-safe for a potential concurrent
+ * 
- * simulation (though the current engine {@link sd.engine.SimulationEngine}
+ * <p><strong>Thread-safety:</strong> Usa locks para permitir acesso concorrente seguro entre
- * is single-threaded). It uses a {@link ReentrantLock} to protect its
+ * a thread de processamento de eventos e as threads de I/O de rede.</p>
- * internal state (the queue and the light state) from simultaneous access.
- * * The {@link Condition} variables ({@code vehicleAdded}, {@code lightGreen})
- * are included for a concurrent model where:
- * - A "vehicle" thread might wait on {@code lightGreen} until the light changes.
- * - A "controller" thread might wait on {@code vehicleAdded} to know when to
- * process a queue.
- * (Note: These Conditions are *not* used by the current discrete-event engine).
  */
 public class TrafficLight {
 
-    // --- Identity and configuration ---
+    /** Identificador único do semáforo (ex: "Cr1-N") */
-    
-    /**
-     * Unique identifier for the light (e.g., "Cr1-N").
-     */
     private final String id;
 
-    /**
+    /** Direção que este semáforo controla (ex: "Norte", "Sul") */
-     * The direction this light controls (e.g., "North", "South").
-     */
     private final String direction;
 
-    /**
+    /** Estado atual do semáforo (VERDE ou VERMELHO) */
-     * The current state of the light (GREEN or RED).
-     */
     private TrafficLightState state;
 
-    // --- Vehicle management ---
+    /** Fila de veículos à espera neste semáforo */
-    
-    /**
-     * The queue of vehicles waiting at this light.
-     * {@link LinkedList} is used as it's a standard {@link Queue} implementation.
-     */
     private final Queue<Vehicle> queue;
 
-    // --- Synchronization primitives (for thread-safety) ---
-    
     /**
-     * A lock to protect all mutable state ({@link #queue} and {@link #state})
+     * Lock para proteger o estado mutável ({@link #queue} e {@link #state})
-     * from concurrent access. Any method reading or writing these fields
+     * de acesso concorrente.
-     * *must* acquire this lock first.
      */
     private final Lock lock;
 
-    /**
+    /** Variável de condição para sinalizar adição de veículos (uso futuro) */
-     * A condition variable for a potential concurrent model.
-     * It could be used to signal threads (e.g., a controller) that
-     * a new vehicle has been added to the queue.
-     * (Not used in the current discrete-event engine).
-     */
     private final Condition vehicleAdded;
 
-    /**
+    /** Variável de condição para sinalizar que o semáforo ficou verde (uso futuro) */
-     * A condition variable for a potential concurrent model.
-     * It could be used to signal waiting vehicle threads that the
-     * light has just turned GREEN.
-     * (Not used in the current discrete-event engine).
-     */
     private final Condition lightGreen;
 
-    // --- Timing configuration ---
+    /** Duração (segundos) que o semáforo permanece VERDE */
-    
-    /**
-     * The duration (in seconds) this light stays GREEN.
-     */
     private double greenTime;
 
-    /**
+    /** Duração (segundos) que o semáforo permanece VERMELHO */
-     * The duration (in seconds) this light stays RED.
-     */
     private double redTime;
 
-    // --- Statistics ---
+    /** Número total de veículos processados por este semáforo */
-    
-    /**
-     * Counter for the total number of vehicles that have
-     * been dequeued (processed) by this light.
-     */
     private int totalVehiclesProcessed;
 
     /**
-     * Constructs a new TrafficLight.
+     * Regista quando os veículos chegam ao semáforo para cálculo do tempo de espera.
+     * Mapeia ID do veículo para tempo de simulação de chegada (segundos).
+     */
+    private final Map<String, Double> vehicleArrivalTimes;
+
+    /**
+     * Cria um novo semáforo.
      *
-     * @param id The unique ID (e.g., "Cr1-N").
+     * @param id identificador único (ex: "Cr1-N")
-     * @param direction The direction (e.g., "North").
+     * @param direction direção controlada (ex: "Norte")
-     * @param greenTime The duration of the GREEN state in seconds.
+     * @param greenTime duração do estado VERDE em segundos
-     * @param redTime The duration of the RED state in seconds.
+     * @param redTime duração do estado VERMELHO em segundos
      */
     public TrafficLight(String id, String direction, double greenTime, double redTime) {
         this.id = id;
         this.direction = direction;
-        this.state = TrafficLightState.RED; // All lights start RED
+        this.state = TrafficLightState.RED;
         this.queue = new LinkedList<>();
 
-        // Initialize synchronization objects
         this.lock = new ReentrantLock();
         this.vehicleAdded = lock.newCondition();
         this.lightGreen = lock.newCondition();
 
         this.greenTime = greenTime;
         this.redTime = redTime;
+        this.vehicleArrivalTimes = new HashMap<>();
         this.totalVehiclesProcessed = 0;
     }
 
     /**
-     * Adds a vehicle to the *end* of the waiting queue.
+     * Coloca um veículo na fila deste semáforo.
-     * This method is thread-safe.
      * 
-     * @param vehicle The {@link Vehicle} to add.
+     * Registamos a hora de chegada para podermos calcular mais tarde quanto tempo o
+     * veículo esperou.
+     * 
+     * @param vehicle O veículo que chega ao semáforo.
+     * @param simulationTime O tempo de simulação atual (em segundos).
      */
-    public void addVehicle(Vehicle vehicle) {
+    public void addVehicle(Vehicle vehicle, double simulationTime) {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
-            queue.offer(vehicle); // Add vehicle to queue
+            queue.offer(vehicle);
-            vehicleAdded.signalAll(); // Signal (for concurrent models)
+            vehicleArrivalTimes.put(vehicle.getId(), simulationTime);
+            vehicleAdded.signalAll();
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
     /**
-     * Removes and returns the {@link Vehicle} from the *front* of the queue.
+     * Remove um veículo da fila para travessia.
-     * * This only succeeds if:
-     * 1. The light's state is {@link TrafficLightState#GREEN}.
-     * 2. The queue is not empty.
-     * * If these conditions are not met, it returns {@code null}.
-     * This method is thread-safe.
      * 
-     * @return The {@link Vehicle} at the front of the queue, or {@code null}
+     * <p>Só remove se:</p>
-     * if the light is RED or the queue is empty.
+     * <ul>
+     *   <li>O semáforo estiver VERDE</li>
+     *   <li>Existir pelo menos um veículo na fila</li>
+     * </ul>
+     * 
+     * <p>Atualiza automaticamente as estatísticas de tempo de espera do veículo.</p>
+     * 
+     * @param simulationTime O tempo de simulação atual (em segundos).
+     * @return o veículo que vai atravessar, ou null se não for possível
      */
-    public Vehicle removeVehicle() {
+    public Vehicle removeVehicle(double simulationTime) {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
             if (state == TrafficLightState.GREEN && !queue.isEmpty()) {
-                Vehicle vehicle = queue.poll(); // Remove vehicle from queue
+                Vehicle vehicle = queue.poll();
                 if (vehicle != null) {
                     totalVehiclesProcessed++;
+
+                    Double arrivalTime = vehicleArrivalTimes.remove(vehicle.getId());
+                    if (arrivalTime != null) {
+                        double waitTimeSeconds = simulationTime - arrivalTime;
+                        vehicle.addWaitingTime(waitTimeSeconds);
+                    }
                 }
                 return vehicle;
             }
-            return null; // Light is RED or queue is empty
+            return null;
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
     /**
-     * Changes the light’s state (e.g., RED -> GREEN).
+     * Muda o estado do semáforo.
-     * If the new state is GREEN, it signals any waiting threads
-     * (for a potential concurrent model).
-     * This method is thread-safe.
      * 
-     * @param newState The {@link TrafficLightState} to set.
+     * @param newState novo estado (VERDE ou VERMELHO)
      */
     public void changeState(TrafficLightState newState) {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
             this.state = newState;
             if (newState == TrafficLightState.GREEN) {
-                lightGreen.signalAll(); // Signal (for concurrent models)
+                lightGreen.signalAll();
             }
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
     /**
-     * Returns how many vehicles are currently in the queue.
+     * Retorna quantos veículos estão atualmente na fila.
-     * This method is thread-safe.
+     * Método thread-safe.
-     * * @return The size of the queue.
+     * 
+     * @return tamanho da fila
      */
     public int getQueueSize() {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
             return queue.size();
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
     /**
-     * Checks whether the queue is empty.
+     * Verifica se a fila está vazia.
-     * This method is thread-safe.
+     * Método thread-safe.
      *
-     * @return {@code true} if the queue has no vehicles, {@code false} otherwise.
+     * @return {@code true} se não houver veículos, {@code false} caso contrário
      */
     public boolean isQueueEmpty() {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
             return queue.isEmpty();
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
-    // --- Getters & Setters ---
+    /** @return identificador único do semáforo */
-
-    /**
-     * @return The unique ID of this light (e.g., "Cr1-N").
-     */
     public String getId() {
         return id;
     }
 
-    /**
+    /** @return direção controlada por este semáforo */
-     * @return The direction this light controls (e.g., "North").
-     */
     public String getDirection() {
         return direction;
     }
 
     /**
-     * Gets the current state of the light (GREEN or RED).
+     * Obtém o estado atual do semáforo.
-     * This method is thread-safe.
+     * Método thread-safe.
      *
-     * @return The current {@link TrafficLightState}.
+     * @return estado atual (VERDE ou VERMELHO)
      */
     public TrafficLightState getState() {
-        lock.lock(); // Acquire the lock
+        lock.lock();
         try {
             return state;
         } finally {
-            lock.unlock(); // Always release the lock
+            lock.unlock();
         }
     }
 
-    /**
+    /** @return duração configurada do sinal verde em segundos */
-     * @return The configured GREEN light duration in seconds.
-     */
     public double getGreenTime() {
         return greenTime;
     }
 
     /**
-     * Sets the GREEN light duration.
+     * Define a duração do sinal verde.
-     * @param greenTime The new duration in seconds.
+     * 
+     * @param greenTime nova duração em segundos
      */
     public void setGreenTime(double greenTime) {
         this.greenTime = greenTime;
     }
 
-    /**
+    /** @return duração configurada do sinal vermelho em segundos */
-     * @return The configured RED light duration in seconds.
-     */
     public double getRedTime() {
         return redTime;
     }
 
     /**
-     * Sets the RED light duration.
+     * Define a duração do sinal vermelho.
-     * @param redTime The new duration in seconds.
+     * 
+     * @param redTime nova duração em segundos
      */
     public void setRedTime(double redTime) {
         this.redTime = redTime;
     }
 
-    /**
+    /** @return número total de veículos processados por este semáforo */
-     * @return The total number of vehicles processed (dequeued) by this light.
-     */
     public int getTotalVehiclesProcessed() {
-        // Note: This read is not locked, assuming it's okay
-        // for it to be "eventually consistent" for stats.
-        // For strict accuracy, it should also be locked.
         return totalVehiclesProcessed;
     }
 
-    /**
+    /** @return objeto {@link Lock} para sincronização avançada */
-     * @return The {@link Lock} object for advanced synchronization.
-     */
     public Lock getLock() {
         return lock;
     }
 
-    /**
+    /** @return condição para adição de veículos */
-     * @return The {@link Condition} for vehicle additions.
-     */
     public Condition getVehicleAdded() {
         return vehicleAdded;
     }
 
-    /**
+    /** @return condição para semáforo ficar verde */
-     * @return The {@link Condition} for the light turning green.
-     */
     public Condition getLightGreen() {
         return lightGreen;
     }
 
-    /**
+    /** @return representação textual do estado atual do semáforo */
-     * @return A string summary of the light's current state.
-     */
     @Override
     public String toString() {
         return String.format(
                 "TrafficLight{id='%s', direction='%s', state=%s, queueSize=%d}",
-            id, direction, getState(), getQueueSize() // Use getters for thread-safety
+                id, direction, getState(), getQueueSize()
         );
     }
 }

main/src/main/java/sd/model/TrafficLightState.java

@@ -1,17 +1,13 @@
 package sd.model;
 
 /**
- * Enumeration representing the two possible states of a {@link TrafficLight}.
+ * Estados possíveis de um semáforo ({@link TrafficLight}).
  */
 public enum TrafficLightState {
     
-    /**
+    /** Sinal verde - veículos podem passar */
-     * The light is GREEN, allowing vehicles to pass (be dequeued).
-     */
     GREEN,
     
-    /**
+    /** Sinal vermelho - veículos aguardam na fila */
-     * The light is RED, blocking vehicles (they remain in the queue).
-     */
     RED
 }

main/src/main/java/sd/model/Vehicle.java

@@ -5,93 +5,74 @@ import java.util.ArrayList;
 import java.util.List;
 
 /**
- * Represents a single vehicle moving through the simulation.
+ * Representa um veículo que se move pela rede de interseções.
  * 
- * This class is a data object that holds the state of a vehicle, including:
+ * <p>Esta classe é o "gémeo digital" de um carro, mota ou camião.
- * - Its unique ID, type, and entry time.
+ * Mantém toda a informação necessária:</p>
- * - Its complete, pre-determined {@code route} (a list of intersection IDs).
+ * <ul>
- * - Its current position in the route ({@code currentRouteIndex}).
+ *   <li>Identificação e tipo do veículo</li>
- * - Metrics for total time spent waiting at red lights and time spent crossing.
+ *   <li>Rota completa a percorrer</li>
- * * This object is passed around the simulation, primarily inside {@link Event}
+ *   <li>Métricas de tempo (espera, travessia, total)</li>
- * payloads and stored in {@link TrafficLight} queues.
+ * </ul>
- * * Implements {@link Serializable} so it can be sent between processes
+ * 
- * or nodes (e.g., over a socket in a distributed version of the simulation).
+ * <p>O objeto é serializado e enviado pela rede à medida que o veículo
+ * se move entre processos distribuídos.</p>
  */
 public class Vehicle implements Serializable {
     private static final long serialVersionUID = 1L;
 
-    // --- Identity and configuration ---
+    /** Identificador único do veículo (ex: "V1", "V2") */
-    
-    /**
-     * Unique identifier for the vehicle (e.g., "V1", "V2").
-     */
     private final String id;
 
-    /**
+    /** Tipo de veículo (BIKE, LIGHT, HEAVY) */
-     * The type of vehicle (BIKE, LIGHT, HEAVY).
-     */
     private final VehicleType type;
 
-    /**
+    /** Tempo de simulação (em segundos) em que o veículo foi gerado */
-     * The simulation time (in seconds) when the vehicle was generated.
-     */
     private final double entryTime;
 
     /**
-     * The complete, ordered list of destinations (intersection IDs and the
+     * Lista ordenada completa de destinos (IDs de interseções e saída "S").
-     * final exit "S"). Example: ["Cr1", "Cr3", "S"].
+     * Exemplo: ["Cr1", "Cr3", "S"]
      */
     private final List<String> route;
 
     /**
-     * An index that tracks the vehicle's progress along its {@link #route}.
+     * Índice que acompanha o progresso do veículo ao longo da {@link #route}.
-     * {@code route.get(currentRouteIndex)} is the vehicle's *current*
+     * {@code route.get(currentRouteIndex)} é o destino *atual* do veículo.
-     * destination (i.e., the one it is traveling *towards* or *arriving at*).
      */
     private int currentRouteIndex;
 
-    // --- Metrics ---
+    /** Tempo total acumulado (segundos) que o veículo passou à espera em semáforos vermelhos */
-    
-    /**
-     * The total accumulated time (in seconds) this vehicle has spent
-     * waiting at red lights.
-     */
     private double totalWaitingTime;
 
-    /**
+    /** Tempo total acumulado (segundos) que o veículo passou a atravessar interseções */
-     * The total accumulated time (in seconds) this vehicle has spent
-     * actively crossing intersections.
-     */
     private double totalCrossingTime;
 
     /**
-     * Constructs a new Vehicle.
+     * Cria um novo veículo pronto para se fazer à estrada.
      * 
-     * @param id The unique ID for the vehicle.
+     * @param id        Identificador único (ex: "V1").
-     * @param type The {@link VehicleType}.
+     * @param type      O tipo de veículo (determina velocidade/tamanho).
-     * @param entryTime The simulation time when the vehicle is created.
+     * @param entryTime Quando este veículo entrou na simulação (segundos).
-     * @param route The complete list of destination IDs (e.t., ["Cr1", "Cr2", "S"]).
+     * @param route     A lista ordenada de paragens (Interseções -> Saída).
      */
     public Vehicle(String id, VehicleType type, double entryTime, List<String> route) {
         this.id = id;
         this.type = type;
         this.entryTime = entryTime;
-        // Create a copy of the route list to ensure immutability
         this.route = new ArrayList<>(route);
-        this.currentRouteIndex = 0; // Starts at the first destination
+        this.currentRouteIndex = 0;
         this.totalWaitingTime = 0.0;
         this.totalCrossingTime = 0.0;
     }
 
     /**
-     * Advances the vehicle to the next stop in its route by
+     * Move o GPS interno do veículo para o próximo destino.
-     * incrementing the {@link #currentRouteIndex}.
-     * * This is typically called *after* a vehicle *arrives* at an intersection,
-     * to set its *next* destination before it is queued.
      * 
-     * @return {@code true} if there is still at least one more destination
+     * Chame isto quando um veículo chega a uma interseção para atualizar para onde
-     * in the route, {@code false} if the vehicle has passed its
+     * deve ir a seguir.
-     * final destination.
+     * 
+     * @return true se houver mais paragens, false se a viagem terminou.
      */
     public boolean advanceRoute() {
         currentRouteIndex++;
@@ -99,120 +80,93 @@ public class Vehicle implements Serializable {
     }
 
     /**
-     * Gets the current destination (the next intersection or exit) that
+     * Obtém o destino atual (próxima interseção ou saída) para onde o veículo se dirige.
-     * the vehicle is heading towards.
      *
-     * @return The ID of the current destination (e.g., "Cr1"), or
+     * @return ID do destino atual (ex: "Cr1"), ou {@code null} se a rota terminou
-     * {@code null} if the route is complete.
      */
     public String getCurrentDestination() {
         return (currentRouteIndex < route.size()) ? route.get(currentRouteIndex) : null;
     }
 
     /**
-     * Checks if the vehicle has completed its entire route.
+     * Verifica se o veículo completou toda a sua rota.
      *
-     * @return {@code true} if the route index is at or past the end
+     * @return {@code true} se chegou ao fim da rota, {@code false} caso contrário
-     * of the route list, {@code false} otherwise.
      */
     public boolean hasReachedEnd() {
         return currentRouteIndex >= route.size();
     }
 
-    // --- Getters and metrics management ---
+    /** @return identificador único do veículo */
-
-    /**
-     * @return The vehicle's unique ID.
-     */
     public String getId() {
         return id;
     }
 
-    /**
+    /** @return tipo do veículo */
-     * @return The vehicle's {@link VehicleType}.
-     */
     public VehicleType getType() {
         return type;
     }
 
-    /**
+    /** @return tempo de simulação em que o veículo entrou no sistema */
-     * @return The simulation time when the vehicle entered the system.
-     */
     public double getEntryTime() {
         return entryTime;
     }
 
-    /**
+    /** @return cópia da rota completa do veículo */
-     * @return A *copy* of the vehicle's complete route.
-     */
     public List<String> getRoute() {
-        // Return a copy to prevent external modification
         return new ArrayList<>(route);
     }
 
-    /**
+    /** @return índice atual apontando para o destino do veículo na sua rota */
-     * @return The current index pointing to the vehicle's destination in its route list.
-     */
     public int getCurrentRouteIndex() {
         return currentRouteIndex;
     }
 
-    /**
+    /** @return tempo total acumulado de espera em segundos */
-     * @return The total accumulated waiting time in seconds.
-     */
     public double getTotalWaitingTime() {
         return totalWaitingTime;
     }
 
     /**
-     * Adds a duration to the vehicle's total waiting time.
+     * Adiciona uma duração ao tempo total de espera do veículo.
-     * This is called by the simulation engine when a vehicle
+     * Chamado quando um veículo começa a atravessar uma interseção.
-     * starts crossing an intersection.
      *
-     * @param time The duration (in seconds) to add.
+     * @param time duração (em segundos) a adicionar
      */
     public void addWaitingTime(double time) {
         totalWaitingTime += time;
     }
 
-    /**
+    /** @return tempo total acumulado de travessia em segundos */
-     * @return The total accumulated crossing time in seconds.
-     */
     public double getTotalCrossingTime() {
         return totalCrossingTime;
     }
 
     /**
-     * Adds a duration to the vehicle's total crossing time.
+     * Adiciona uma duração ao tempo total de travessia do veículo.
-     * This is called by the simulation engine when a vehicle
+     * Chamado quando um veículo termina de atravessar uma interseção.
-     * finishes crossing an intersection.
      *
-     * @param time The duration (in seconds) to add.
+     * @param time duração (em segundos) a adicionar
      */
     public void addCrossingTime(double time) {
         totalCrossingTime += time;
     }
 
     /**
-     * Calculates the vehicle's total time spent in the system so far.
+     * Calcula o tempo total que o veículo passou no sistema até agora.
-     * This is a "live" calculation.
      *
-     * @param currentTime The current simulation time.
+     * @param currentTime tempo atual da simulação
-     * @return The total elapsed time (in seconds) since the vehicle
+     * @return tempo total decorrido (em segundos) desde que o veículo foi gerado
-     * was generated ({@code currentTime - entryTime}).
      */
     public double getTotalTravelTime(double currentTime) {
         return currentTime - entryTime;
     }
 
-    /**
+    /** @return representação textual do estado atual do veículo */
-     * @return A string summary of the vehicle's current state.
-     */
     @Override
     public String toString() {
         return String.format(
                 "Vehicle{id='%s', type=%s, next='%s', route=%s}",
-            id, type, getCurrentDestination(), route
+                id, type, getCurrentDestination(), route);
-        );
     }
 }

main/src/main/java/sd/model/VehicleType.java

@@ -1,27 +1,19 @@
 package sd.model;
 
 /**
- * Enumeration representing the different types of vehicles in the simulation.
+ * Enumeração dos diferentes tipos de veículos na simulação.
- * Each type can have different properties, such as crossing time
+ * 
- * and generation probability, defined in {@link sd.config.SimulationConfig}.
+ * <p>Cada tipo pode ter propriedades diferentes como tempo de travessia
+ * e probabilidade de geração, definidas na {@link sd.config.SimulationConfig}.</p>
  */
 public enum VehicleType {
     
-    /**
+    /** Bicicleta ou motocicleta - tempo de travessia curto */
-     * A bike or motorcycle.
-     * Typically has a short crossing time.
-     */
     BIKE,
     
-    /**
+    /** Veículo ligeiro padrão (carro) - tipo mais comum */
-     * A standard light vehicle, such as a car.
-     * This is usually the most common type.
-     */
     LIGHT,
     
-    /**
+    /** Veículo pesado (camião ou autocarro) - tempo de travessia longo */
-     * A heavy vehicle, such as a truck or bus.
-     * Typically has a long crossing time.
-     */
     HEAVY
 }

main/src/main/java/sd/protocol/MessageProtocol.java

@@ -0,0 +1,45 @@
+package sd.protocol;
+
+import java.io.Serializable;
+
+import sd.model.MessageType; // Assuming MessageType is in sd.model or sd.protocol
+
+/**
+ * Contrato para todas as mensagens trocadas no simulador.
+ * 
+ * <p>Garante que mensagens podem ser identificadas e encaminhadas.
+ * Extende Serializable para permitir envio via sockets.
+ */
+public interface MessageProtocol extends Serializable {
+
+    /**
+     * Tipo da mensagem, indicando o seu propósito.
+     * @return tipo (ex: VEHICLE_TRANSFER, STATS_UPDATE)
+     */
+    MessageType getType();
+
+    /**
+     * Dados (payload) que esta mensagem transporta.
+     * 
+     * <p>Tipo depende do MessageType:
+     * <ul>
+     * <li>VEHICLE_TRANSFER → objeto Vehicle
+     * <li>STATS_UPDATE → objeto de estatísticas
+     * </ul>
+     * 
+     * @return payload (deve ser Serializable)
+     */
+    Object getPayload();
+
+    /**
+     * ID do nó (processo) que enviou a mensagem.
+     * @return ID de origem (ex: "Cr1", "Cr5", "S")
+     */
+    String getSourceNode();
+
+    /**
+     * ID do nó de destino.
+     * @return ID de destino (ex: "Cr2", "DashboardServer")
+     */
+    String getDestinationNode();
+}

main/src/main/java/sd/protocol/SocketConnection.java

@@ -0,0 +1,196 @@
+package sd.protocol; 
+
+import java.io.Closeable;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.ConnectException;
+import java.net.Socket;
+import java.net.SocketTimeoutException;
+import java.net.UnknownHostException;
+import java.util.concurrent.TimeUnit;
+
+import sd.serialization.MessageSerializer;
+import sd.serialization.SerializationException;
+import sd.serialization.SerializerFactory;
+
+
+/**
+ * Simplifica comunicação via sockets.
+ * Inclui lógica de retry para robustez.
+ */
+public class SocketConnection implements Closeable {
+
+    private final Socket socket;
+    private final OutputStream outputStream;
+    private final InputStream inputStream;
+    private final MessageSerializer serializer;
+
+    /** Número máximo de tentativas de ligação */
+    private static final int MAX_RETRIES = 5; 
+    /** Atraso entre tentativas (milissegundos) */
+    private static final long RETRY_DELAY_MS = 1000; 
+
+    /**
+     * Construtor do cliente que inicia a ligação.
+     * Tenta ligar a um servidor já em escuta, com retry.
+     *
+     * @param host endereço do host (ex: "localhost")
+     * @param port número da porta
+     * @throws IOException se falhar após todas as tentativas
+     * @throws UnknownHostException se o host não for encontrado
+     * @throws InterruptedException se a thread for interrompida
+     */
+    public SocketConnection(String host, int port) throws IOException, UnknownHostException, InterruptedException {
+        Socket tempSocket = null;
+        IOException lastException = null;
+
+        System.out.printf("[SocketConnection] Attempting to connect to %s:%d...%n", host, port);
+
+        // --- Retry Loop ---
+        for (int attempt = 1; attempt <= MAX_RETRIES; attempt++) {
+            try {
+                // Try to establish the connection
+                tempSocket = new Socket(host, port);
+
+                // If successful, break out of the retry loop
+                System.out.printf("[SocketConnection] Connected successfully on attempt %d.%n", attempt);
+                lastException = null; // Clear last error on success
+                break;
+
+            } catch (ConnectException | SocketTimeoutException e) {
+                // These are common errors indicating the server might not be ready.
+                lastException = e;
+                System.out.printf("[SocketConnection] Attempt %d/%d failed: %s. Retrying in %d ms...%n",
+                        attempt, MAX_RETRIES, e.getMessage(), RETRY_DELAY_MS);
+
+                if (attempt < MAX_RETRIES) {
+                    // Wait before the next attempt
+                    TimeUnit.MILLISECONDS.sleep(RETRY_DELAY_MS);
+                }
+            } catch (IOException e) {
+                // Other IOExceptions might be more permanent, but we retry anyway.
+                 lastException = e;
+                 System.out.printf("[SocketConnection] Attempt %d/%d failed with IOException: %s. Retrying in %d ms...%n",
+                        attempt, MAX_RETRIES, e.getMessage(), RETRY_DELAY_MS);
+                 if (attempt < MAX_RETRIES) {
+                     TimeUnit.MILLISECONDS.sleep(RETRY_DELAY_MS);
+                 }
+            }
+        } // --- End of Retry Loop ---
+
+        // If after all retries tempSocket is still null, it means connection failed permanently.
+        if (tempSocket == null) {
+            System.err.printf("[SocketConnection] Failed to connect to %s:%d after %d attempts.%n", host, port, MAX_RETRIES);
+            if (lastException != null) {
+                 throw lastException; // Throw the last exception encountered
+            } else {
+                 // Should not happen if loop ran, but as a fallback
+                 throw new IOException("Failed to connect after " + MAX_RETRIES + " attempts, reason unknown.");
+            }
+        }
+
+        // If connection was successful, assign to final variable and create streams
+        this.socket = tempSocket;
+          
+        this.outputStream = socket.getOutputStream();
+        this.inputStream = socket.getInputStream();
+        this.serializer = SerializerFactory.createDefault();
+
+    }
+
+
+    /**
+     * Constructor for the "Server" (who accepts the connection).
+     * Receives a Socket that has already been accepted by a ServerSocket.
+     * No retry logic needed here as the connection is already established.
+     *
+     * @param acceptedSocket The Socket returned by serverSocket.accept().
+     * @throws IOException If stream creation fails.
+     */
+    public SocketConnection(Socket acceptedSocket) throws IOException {
+        this.socket = acceptedSocket;
+        this.outputStream = socket.getOutputStream();
+        this.inputStream = socket.getInputStream();
+        this.serializer = SerializerFactory.createDefault();
+        
+    }
+
+    /**
+     * Sends (serializes) a MessageProtocol object over the socket.
+     *
+     * @param message The "envelope" (which contains the Vehicle) to be sent.
+     * @throws IOException If writing to the stream fails or socket is not connected.
+     */
+    public synchronized void sendMessage(MessageProtocol message) throws IOException {
+   if (socket == null || !socket.isConnected()) {
+            throw new IOException("Socket is not connected");
+        }
+
+        try {
+            // Serializa para bytes JSON
+            byte[] data = serializer.serialize(message);
+            
+            // Write 4-byte length prefix
+            DataOutputStream dataOut = new DataOutputStream(outputStream);
+            dataOut.writeInt(data.length);
+            dataOut.write(data);
+            dataOut.flush();
+            
+        } catch (SerializationException e) {
+            throw new IOException("Failed to serialize message", e);
+        }
+    }
+
+    /**
+     * Tries to read (deserialize) a MessageProtocol object from the socket.
+     *
+     * @return The "envelope" (MessageProtocol) that was received.
+     * @throws IOException If the connection is lost, the stream is corrupted, or socket is not connected.
+     * @throws ClassNotFoundException If the received object is unknown.
+     */
+    public MessageProtocol receiveMessage() throws IOException, ClassNotFoundException {
+       if (socket == null || !socket.isConnected()) {
+            throw new IOException("Socket is not connected");
+        }
+
+        try {
+            // Lê um prefixo de 4 bytes - indicador de tamanho
+            DataInputStream dataIn = new DataInputStream(inputStream);
+            int length = dataIn.readInt();
+            
+            if (length <= 0 || length > 10_000_000) { // Sanity check (10MB max)
+                throw new IOException("Invalid message length: " + length);
+            }
+            
+            // Ler dados da mensagem
+            byte[] data = new byte[length];
+            dataIn.readFully(data);
+            
+            // Deserialize do JSON - use concrete Message class, not interface
+            return serializer.deserialize(data, sd.model.Message.class);
+            
+        } catch (SerializationException e) {
+            throw new IOException("Failed to deserialize message", e);
+        }
+    }
+
+    /**
+     * Closes the socket and all streams (Input and Output).
+     */
+    @Override
+    public void close() throws IOException {
+        if (inputStream != null) inputStream.close();
+        if (outputStream != null) outputStream.close();
+        if (socket != null) socket.close();
+    }
+
+    /**
+     * @return true if the socket is still connected and not closed.
+     */
+    public boolean isConnected() {
+        return socket != null && socket.isConnected() && !socket.isClosed();
+    }
+}

main/src/main/java/sd/routing/LeastCongestedRouteSelector.java

@@ -0,0 +1,151 @@
+package sd.routing;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Implementação da política de roteamento por menor congestionamento.
+ * 
+ * <p>Esta política escolhe dinamicamente a rota que passa pelos cruzamentos
+ * menos congestionados, com base no tamanho atual das filas em cada interseção.
+ * É uma política dinâmica que adapta as decisões ao estado da rede.</p>
+ * 
+ * <p>Objetivo: Distribuir o tráfego pela rede, evitando bottlenecks e
+ * minimizando o tempo de espera total.</p>
+ * 
+ * <p><strong>Algoritmo:</strong></p>
+ * <ol>
+ *   <li>Para cada rota possível, calcula a carga total (soma das filas)</li>
+ *   <li>Escolhe a rota com menor carga total</li>
+ *   <li>Em caso de empate ou falta de informação, usa a rota mais curta</li>
+ * </ol>
+ */
+public class LeastCongestedRouteSelector implements RouteSelector {
+    
+    /** Rotas possíveis a partir do ponto de entrada E1 */
+    private final List<List<String>> e1Routes;
+    /** Rotas possíveis a partir do ponto de entrada E2 */
+    private final List<List<String>> e2Routes;
+    /** Rotas possíveis a partir do ponto de entrada E3 */
+    private final List<List<String>> e3Routes;
+    
+    /**
+     * Cria um novo seletor de rotas baseado em menor congestionamento.
+     */
+    public LeastCongestedRouteSelector() {
+        this.e1Routes = new ArrayList<>();
+        this.e2Routes = new ArrayList<>();
+        this.e3Routes = new ArrayList<>();
+        initializeRoutes();
+    }
+    
+    /**
+     * Inicializa as rotas possíveis para cada ponto de entrada.
+     */
+    private void initializeRoutes() {
+        // Rotas de E1 (entrada Norte)
+        e1Routes.add(Arrays.asList("Cr1", "Cr4", "Cr5", "S"));
+        e1Routes.add(Arrays.asList("Cr1", "Cr2", "Cr5", "S"));
+        e1Routes.add(Arrays.asList("Cr1", "Cr2", "Cr3", "S"));
+        
+        // Rotas de E2 (entrada Oeste)
+        e2Routes.add(Arrays.asList("Cr2", "Cr5", "S"));
+        e2Routes.add(Arrays.asList("Cr2", "Cr3", "S"));
+        e2Routes.add(Arrays.asList("Cr2", "Cr1", "Cr4", "Cr5", "S"));
+        
+        // Rotas de E3 (entrada Sul)
+        e3Routes.add(Arrays.asList("Cr3", "S"));
+        e3Routes.add(Arrays.asList("Cr3", "Cr2", "Cr5", "S"));
+        e3Routes.add(Arrays.asList("Cr3", "Cr2", "Cr1", "Cr4", "Cr5", "S"));
+    }
+    
+    @Override
+    public List<String> selectRoute(String entryPoint, Map<String, Integer> queueSizes) {
+        List<List<String>> availableRoutes = getRoutesForEntryPoint(entryPoint);
+        
+        // Se não temos informação sobre filas, usa a rota mais curta como fallback
+        if (queueSizes == null || queueSizes.isEmpty()) {
+            return selectShortestRoute(availableRoutes);
+        }
+        
+        // Calcula a carga de cada rota e escolhe a menos congestionada
+        List<String> bestRoute = null;
+        int minLoad = Integer.MAX_VALUE;
+        
+        for (List<String> route : availableRoutes) {
+            int routeLoad = calculateRouteLoad(route, queueSizes);
+            
+            if (routeLoad < minLoad) {
+                minLoad = routeLoad;
+                bestRoute = route;
+            }
+        }
+        
+        // Fallback: se não conseguimos calcular carga, usa a primeira rota
+        if (bestRoute == null) {
+            bestRoute = availableRoutes.get(0);
+        }
+        
+        return new ArrayList<>(bestRoute);
+    }
+    
+    /**
+     * Calcula a carga total de uma rota (soma do tamanho das filas em todos os cruzamentos).
+     * 
+     * @param route rota a avaliar
+     * @param queueSizes mapa com tamanho das filas por interseção
+     * @return carga total da rota (soma das filas)
+     */
+    private int calculateRouteLoad(List<String> route, Map<String, Integer> queueSizes) {
+        int totalLoad = 0;
+        
+        for (String intersection : route) {
+            // Ignora "S" (saída) e apenas conta cruzamentos reais
+            if (!intersection.equals("S") && queueSizes.containsKey(intersection)) {
+                totalLoad += queueSizes.get(intersection);
+            }
+        }
+        
+        return totalLoad;
+    }
+    
+    /**
+     * Seleciona a rota mais curta (menor número de nós) como fallback.
+     * 
+     * @param routes lista de rotas disponíveis
+     * @return a rota mais curta
+     */
+    private List<String> selectShortestRoute(List<List<String>> routes) {
+        List<String> shortest = routes.get(0);
+        
+        for (List<String> route : routes) {
+            if (route.size() < shortest.size()) {
+                shortest = route;
+            }
+        }
+        
+        return new ArrayList<>(shortest);
+    }
+    
+    /**
+     * Obtém as rotas disponíveis para um ponto de entrada.
+     * 
+     * @param entryPoint ponto de entrada (E1, E2 ou E3)
+     * @return lista de rotas disponíveis
+     */
+    private List<List<String>> getRoutesForEntryPoint(String entryPoint) {
+        switch (entryPoint.toUpperCase()) {
+            case "E1":
+                return e1Routes;
+            case "E2":
+                return e2Routes;
+            case "E3":
+                return e3Routes;
+            default:
+                System.err.printf("Unknown entry point: %s, defaulting to E1%n", entryPoint);
+                return e1Routes;
+        }
+    }
+}

main/src/main/java/sd/routing/RandomRouteSelector.java

@@ -0,0 +1,122 @@
+package sd.routing;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Implementação da política de roteamento aleatória (baseline).
+ * 
+ * <p>Esta política seleciona rotas com base em probabilidades predefinidas,
+ * sem considerar o estado atual da rede. É a implementação de referência
+ * para comparação com outras políticas.</p>
+ * 
+ * <p>As rotas são organizadas por ponto de entrada (E1, E2, E3) e cada rota
+ * tem uma probabilidade de seleção associada.</p>
+ */
+public class RandomRouteSelector implements RouteSelector {
+    
+    /** Rotas possíveis a partir do ponto de entrada E1 */
+    private final List<RouteWithProbability> e1Routes;
+    /** Rotas possíveis a partir do ponto de entrada E2 */
+    private final List<RouteWithProbability> e2Routes;
+    /** Rotas possíveis a partir do ponto de entrada E3 */
+    private final List<RouteWithProbability> e3Routes;
+    
+    /**
+     * Cria um novo seletor de rotas aleatórias com rotas predefinidas.
+     */
+    public RandomRouteSelector() {
+        this.e1Routes = new ArrayList<>();
+        this.e2Routes = new ArrayList<>();
+        this.e3Routes = new ArrayList<>();
+        initializePossibleRoutes();
+    }
+    
+    /**
+     * Define todas as rotas possíveis que os veículos podem tomar.
+     * As rotas são organizadas por ponto de entrada (E1, E2, E3).
+     * Cada rota tem uma probabilidade que determina a frequência com que é escolhida.
+     */
+    private void initializePossibleRoutes() {
+        // Rotas de E1 (entrada Norte)
+        e1Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr1", "Cr4", "Cr5", "S"), 0.34));
+        e1Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr1", "Cr2", "Cr5", "S"), 0.33));
+        e1Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr1", "Cr2", "Cr3", "S"), 0.33));
+        
+        // Rotas de E2 (entrada Oeste)
+        e2Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr2", "Cr5", "S"), 0.34));
+        e2Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr2", "Cr3", "S"), 0.33));
+        e2Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr2", "Cr1", "Cr4", "Cr5", "S"), 0.33));
+        
+        // Rotas de E3 (entrada Sul)
+        e3Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr3", "S"), 0.34));
+        e3Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr3", "Cr2", "Cr5", "S"), 0.33));
+        e3Routes.add(new RouteWithProbability(
+            Arrays.asList("Cr3", "Cr2", "Cr1", "Cr4", "Cr5", "S"), 0.33));
+    }
+    
+    @Override
+    public List<String> selectRoute(String entryPoint, Map<String, Integer> queueSizes) {
+        // Ignora queueSizes - seleção aleatória não depende do estado da rede
+        
+        List<RouteWithProbability> selectedRoutes = getRoutesForEntryPoint(entryPoint);
+        
+        // Seleciona uma rota baseada em probabilidades cumulativas
+        double rand = Math.random();
+        double cumulative = 0.0;
+        
+        for (RouteWithProbability routeWithProb : selectedRoutes) {
+            cumulative += routeWithProb.probability;
+            if (rand <= cumulative) {
+                // Retorna uma cópia da rota para prevenir modificações
+                return new ArrayList<>(routeWithProb.route);
+            }
+        }
+        
+        // Fallback: retorna a primeira rota
+        return new ArrayList<>(selectedRoutes.get(0).route);
+    }
+    
+    /**
+     * Obtém as rotas disponíveis para um ponto de entrada.
+     * 
+     * @param entryPoint ponto de entrada (E1, E2 ou E3)
+     * @return lista de rotas com probabilidades
+     */
+    private List<RouteWithProbability> getRoutesForEntryPoint(String entryPoint) {
+        switch (entryPoint.toUpperCase()) {
+            case "E1":
+                return e1Routes;
+            case "E2":
+                return e2Routes;
+            case "E3":
+                return e3Routes;
+            default:
+                System.err.printf("Unknown entry point: %s, defaulting to E1%n", entryPoint);
+                return e1Routes;
+        }
+    }
+    
+    /**
+     * Classe interna para associar uma rota com sua probabilidade de seleção.
+     */
+    private static class RouteWithProbability {
+        final List<String> route;
+        final double probability;
+        
+        RouteWithProbability(List<String> route, double probability) {
+            this.route = route;
+            this.probability = probability;
+        }
+    }
+}

main/src/main/java/sd/routing/RouteSelector.java

@@ -0,0 +1,25 @@
+package sd.routing;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Interface para implementação de políticas de seleção de rotas.
+ * 
+ * <p>Define o contrato que todas as políticas de roteamento devem seguir.
+ * Permite a implementação de diferentes estratégias de roteamento
+ * (aleatória, caminho mais curto, menor congestionamento, etc.).</p>
+ */
+public interface RouteSelector {
+    
+    /**
+     * Seleciona uma rota para um veículo a partir de um ponto de entrada.
+     * 
+     * @param entryPoint ponto de entrada (E1, E2 ou E3)
+     * @param queueSizes mapa com o tamanho das filas em cada interseção (opcional, pode ser null).
+     *                   Chave: ID da interseção (ex: "Cr1", "Cr2")
+     *                   Valor: número total de veículos em espera nessa interseção
+     * @return lista de IDs representando a rota escolhida (ex: ["Cr1", "Cr2", "Cr5", "S"])
+     */
+    List<String> selectRoute(String entryPoint, Map<String, Integer> queueSizes);
+}

main/src/main/java/sd/routing/RoutingPolicy.java

@@ -0,0 +1,36 @@
+package sd.routing;
+
+/**
+ * Enumeração que define as políticas de roteamento disponíveis para a simulação.
+ * 
+ * <p>As políticas de roteamento determinam como os veículos escolhem o caminho
+ * a seguir desde o ponto de entrada até à saída da rede de interseções.</p>
+ * 
+ * <ul>
+ *   <li><strong>RANDOM:</strong> Seleção aleatória de rotas baseada em probabilidades predefinidas</li>
+ *   <li><strong>SHORTEST_PATH:</strong> Escolhe sempre a rota com o menor número de cruzamentos</li>
+ *   <li><strong>LEAST_CONGESTED:</strong> Escolhe a rota evitando cruzamentos mais congestionados</li>
+ * </ul>
+ */
+public enum RoutingPolicy {
+    /**
+     * Política aleatória (baseline).
+     * Seleciona rotas com base em probabilidades predefinidas, sem considerar
+     * o estado atual da rede.
+     */
+    RANDOM,
+    
+    /**
+     * Política do caminho mais curto.
+     * Sempre escolhe a rota com o menor número de cruzamentos entre o ponto
+     * de entrada e a saída, minimizando a distância teórica.
+     */
+    SHORTEST_PATH,
+    
+    /**
+     * Política das menores filas (roteamento dinâmico).
+     * Escolhe a rota que passa pelos cruzamentos menos congestionados,
+     * com base no tamanho atual das filas em cada interseção.
+     */
+    LEAST_CONGESTED
+}

main/src/main/java/sd/routing/ShortestPathRouteSelector.java

@@ -0,0 +1,89 @@
+package sd.routing;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Implementação da política de roteamento por caminho mais curto.
+ * 
+ * <p>Esta política sempre escolhe a rota com o menor número de cruzamentos
+ * entre o ponto de entrada e a saída. É uma política determinística que
+ * não considera o estado da rede (tamanho das filas).</p>
+ * 
+ * <p>Objetivo: Minimizar a distância teórica percorrida pelos veículos.</p>
+ */
+public class ShortestPathRouteSelector implements RouteSelector {
+    
+    /** Rotas possíveis a partir do ponto de entrada E1, ordenadas por comprimento */
+    private final List<List<String>> e1Routes;
+    /** Rotas possíveis a partir do ponto de entrada E2, ordenadas por comprimento */
+    private final List<List<String>> e2Routes;
+    /** Rotas possíveis a partir do ponto de entrada E3, ordenadas por comprimento */
+    private final List<List<String>> e3Routes;
+    
+    /**
+     * Cria um novo seletor de rotas por caminho mais curto.
+     * As rotas são ordenadas por comprimento (número de cruzamentos).
+     */
+    public ShortestPathRouteSelector() {
+        this.e1Routes = new ArrayList<>();
+        this.e2Routes = new ArrayList<>();
+        this.e3Routes = new ArrayList<>();
+        initializeRoutes();
+    }
+    
+    /**
+     * Inicializa as rotas possíveis para cada ponto de entrada.
+     * As rotas são organizadas da mais curta para a mais longa.
+     */
+    private void initializeRoutes() {
+        // Rotas de E1 (entrada Norte) - ordenadas por comprimento
+        e1Routes.add(Arrays.asList("Cr1", "Cr2", "Cr3", "S"));          // 4 nós
+        e1Routes.add(Arrays.asList("Cr1", "Cr2", "Cr5", "S"));          // 4 nós
+        e1Routes.add(Arrays.asList("Cr1", "Cr4", "Cr5", "S"));          // 4 nós
+        
+        // Rotas de E2 (entrada Oeste) - ordenadas por comprimento
+        e2Routes.add(Arrays.asList("Cr2", "Cr3", "S"));                 // 3 nós (mais curta!)
+        e2Routes.add(Arrays.asList("Cr2", "Cr5", "S"));                 // 3 nós
+        e2Routes.add(Arrays.asList("Cr2", "Cr1", "Cr4", "Cr5", "S"));  // 5 nós
+        
+        // Rotas de E3 (entrada Sul) - ordenadas por comprimento
+        e3Routes.add(Arrays.asList("Cr3", "S"));                        // 2 nós (mais curta!)
+        e3Routes.add(Arrays.asList("Cr3", "Cr2", "Cr5", "S"));         // 4 nós
+        e3Routes.add(Arrays.asList("Cr3", "Cr2", "Cr1", "Cr4", "Cr5", "S")); // 6 nós
+    }
+    
+    @Override
+    public List<String> selectRoute(String entryPoint, Map<String, Integer> queueSizes) {
+        // Ignora queueSizes - política baseada apenas no comprimento do caminho
+        
+        List<List<String>> availableRoutes = getRoutesForEntryPoint(entryPoint);
+        
+        // Retorna a rota mais curta (primeira da lista)
+        List<String> shortestRoute = availableRoutes.get(0);
+        
+        return new ArrayList<>(shortestRoute);
+    }
+    
+    /**
+     * Obtém as rotas disponíveis para um ponto de entrada.
+     * 
+     * @param entryPoint ponto de entrada (E1, E2 ou E3)
+     * @return lista de rotas ordenadas por comprimento
+     */
+    private List<List<String>> getRoutesForEntryPoint(String entryPoint) {
+        switch (entryPoint.toUpperCase()) {
+            case "E1":
+                return e1Routes;
+            case "E2":
+                return e2Routes;
+            case "E3":
+                return e3Routes;
+            default:
+                System.err.printf("Unknown entry point: %s, defaulting to E1%n", entryPoint);
+                return e1Routes;
+        }
+    }
+}

main/src/main/java/sd/serialization/SerializationExample.java

@@ -1,134 +0,0 @@
-package sd.serialization;
-
-import sd.model.Message;
-import sd.model.MessageType;
-import sd.model.Vehicle;
-import sd.model.VehicleType;
-
-import java.util.Arrays;
-import java.util.List;
-
-/**
- * Demonstration of JSON serialization usage in the traffic simulation system.
- * 
- * This class shows practical examples of how to use JSON (Gson) serialization
- * for network communication between simulation processes.
- */
-public class SerializationExample {
-    
-    public static void main(String[] args) {
-        System.out.println("=== JSON Serialization Example ===\n");
-        
-        // Create a sample vehicle
-        List<String> route = Arrays.asList("Cr1", "Cr2", "Cr5", "S");
-        Vehicle vehicle = new Vehicle("V001", VehicleType.LIGHT, 10.5, route);
-        vehicle.addWaitingTime(2.3);
-        vehicle.addCrossingTime(1.2);
-        
-        // Create a message containing the vehicle
-        Message message = new Message(
-            MessageType.VEHICLE_TRANSFER,
-            "Cr1",
-            "Cr2",
-            vehicle
-        );
-        
-        // ===== JSON Serialization =====
-        demonstrateJsonSerialization(message);
-        
-        // ===== Factory Usage =====
-        demonstrateFactoryUsage(message);
-        
-        // ===== Performance Test =====
-        performanceTest(message);
-    }
-    
-    private static void demonstrateJsonSerialization(Message message) {
-        System.out.println("--- JSON Serialization ---");
-        
-        try {
-            // Create JSON serializer with pretty printing for readability
-            MessageSerializer serializer = new JsonMessageSerializer(true);
-            
-            // Serialize to bytes
-            byte[] data = serializer.serialize(message);
-            
-            // Display the JSON
-            String json = new String(data);
-            System.out.println("Serialized JSON (" + data.length + " bytes):");
-            System.out.println(json);
-            
-            // Deserialize back
-            Message deserialized = serializer.deserialize(data, Message.class);
-            System.out.println("\nDeserialized: " + deserialized);
-            System.out.println("✓ JSON serialization successful\n");
-            
-        } catch (SerializationException e) {
-            System.err.println("❌ JSON serialization failed: " + e.getMessage());
-        }
-    }
-    
-    private static void demonstrateFactoryUsage(Message message) {
-        System.out.println("--- Using SerializerFactory ---");
-        
-        try {
-            // Get default serializer (JSON)
-            MessageSerializer serializer = SerializerFactory.createDefault();
-            System.out.println("Default serializer: " + serializer.getName());
-            
-            // Use it
-            byte[] data = serializer.serialize(message);
-            Message deserialized = serializer.deserialize(data, Message.class);
-            
-            System.out.println("Message type: " + deserialized.getType());
-            System.out.println("From: " + deserialized.getSenderId() + 
-                             " → To: " + deserialized.getDestinationId());
-            System.out.println("✓ Factory usage successful\n");
-            
-        } catch (SerializationException e) {
-            System.err.println("❌ Factory usage failed: " + e.getMessage());
-        }
-    }
-    
-    private static void performanceTest(Message message) {
-        System.out.println("--- Performance Test ---");
-        
-        int iterations = 1000;
-        
-        try {
-            MessageSerializer compactSerializer = new JsonMessageSerializer(false);
-            MessageSerializer prettySerializer = new JsonMessageSerializer(true);
-            
-            // Warm up
-            for (int i = 0; i < 100; i++) {
-                compactSerializer.serialize(message);
-            }
-            
-            // Test compact JSON
-            long compactStart = System.nanoTime();
-            byte[] compactData = null;
-            for (int i = 0; i < iterations; i++) {
-                compactData = compactSerializer.serialize(message);
-            }
-            long compactTime = System.nanoTime() - compactStart;
-            
-            // Test pretty JSON
-            byte[] prettyData = prettySerializer.serialize(message);
-            
-            // Results
-            System.out.println("Iterations: " + iterations);
-            System.out.println("\nJSON Compact:");
-            System.out.println("  Size: " + compactData.length + " bytes");
-            System.out.println("  Time: " + (compactTime / 1_000_000.0) + " ms total");
-            System.out.println("  Avg:  " + (compactTime / iterations / 1_000.0) + " μs/operation");
-            
-            System.out.println("\nJSON Pretty-Print:");
-            System.out.println("  Size: " + prettyData.length + " bytes");
-            System.out.println("  Size increase: " + 
-                String.format("%.1f%%", ((double)prettyData.length / compactData.length - 1) * 100));
-            
-        } catch (SerializationException e) {
-            System.err.println("❌ Performance test failed: " + e.getMessage());
-        }
-    }
-}

main/src/main/java/sd/util/RandomGenerator.java

@@ -3,84 +3,82 @@ package sd.util;
 import java.util.Random;
 
 /**
- * Utility class for generating random values used throughout the simulation.
+ * Utilitário para gerar valores aleatórios usados na simulação.
- * * Provides static methods for:
+ * 
- * - Generating exponentially distributed intervals (for Poisson processes).
+ * <p>Fornece métodos estáticos para:</p>
- * - Generating random integers and doubles in a range.
+ * <ul>
- * - Making decisions based on probability.
+ *   <li>Gerar intervalos exponencialmente distribuídos (processos de Poisson)</li>
- * - Choosing random elements from an array.
+ *   <li>Gerar inteiros e doubles aleatórios num intervalo</li>
- * * It uses a single, static {@link Random} instance.
+ *   <li>Tomar decisões baseadas em probabilidade</li>
+ *   <li>Escolher elementos aleatórios de um array</li>
+ * </ul>
+ * 
+ * <p>Usa uma única instância estática de {@link Random}.</p>
  */
 public class RandomGenerator {
 
-    /**
+    /** Instância partilhada de Random para toda a simulação */
-     * The single, shared Random instance for the entire simulation.
-     */
     private static final Random random = new Random();
 
     /**
-     * Returns a random time interval that follows an exponential distribution.
+     * Retorna um intervalo de tempo que segue uma distribuição exponencial.
-     * * This is a key component for modeling a Poisson process, where the
-     * *inter-arrival times* (time between events) are exponentially distributed.
-     * The formula used is the inverse transform sampling method:
-     * {@code Time = -ln(1 - U) / λ}
-     * where U is a uniform random number [0, 1) and λ (lambda) is the
-     * average arrival rate.
      * 
-     * @param lambda The average arrival rate (λ) (e.g., 0.5 vehicles per second).
+     * <p>Componente essencial para modelar processos de Poisson, onde os
-     * @return The time interval (in seconds) until the next arrival.
+     * tempos entre chegadas seguem uma distribuição exponencial.</p>
+     * 
+     * <p>Fórmula: {@code Time = -ln(1 - U) / λ}<br>
+     * onde U é um número aleatório uniforme [0, 1) e λ (lambda) é a taxa média de chegada.</p>
+     *
+     * @param lambda taxa média de chegada λ (ex: 0.5 veículos por segundo)
+     * @return intervalo de tempo (segundos) até à próxima chegada
      */
     public static double generateExponentialInterval(double lambda) {
-        // Math.log is the natural logarithm (ln)
-        // random.nextDouble() returns a value in [0.0, 1.0)
         return Math.log(1 - random.nextDouble()) / -lambda;
     }
 
     /**
-     * Returns a random integer between {@code min} and {@code max}, inclusive.
+     * Retorna um inteiro aleatório entre {@code min} e {@code max}, inclusive.
      *
-     * @param min The minimum possible value.
+     * @param min valor mínimo possível
-     * @param max The maximum possible value.
+     * @param max valor máximo possível
-     * @return A random integer in the range [min, max].
+     * @return inteiro aleatório no intervalo [min, max]
      */
     public static int generateRandomInt(int min, int max) {
-        // random.nextInt(N) returns a value from 0 to N-1
-        // (max - min + 1) is the total number of integers in the range
-        // + min offsets the range
         return random.nextInt(max - min + 1) + min;
     }
 
     /**
-     * Returns a random double between {@code min} (inclusive) and {@code max} (exclusive).
+     * Retorna um double aleatório entre {@code min} (inclusive) e {@code max} (exclusivo).
      *
-     * @param min The minimum possible value.
+     * @param min valor mínimo possível
-     * @param max The maximum possible value.
+     * @param max valor máximo possível
-     * @return A random double in the range [min, max).
+     * @return double aleatório no intervalo [min, max)
      */
     public static double generateRandomDouble(double min, double max) {
         return min + (max - min) * random.nextDouble();
     }
 
     /**
-     * Returns {@code true} with a given probability.
+     * Retorna {@code true} com uma dada probabilidade.
-     * * This is useful for making weighted decisions. For example,
-     * {@code occursWithProbability(0.3)} will return {@code true}
-     * approximately 30% of the time.
      * 
-     * @param probability A value between 0.0 (never) and 1.0 (always).
+     * <p>Útil para tomar decisões ponderadas. Por exemplo,
-     * @return {@code true} or {@code false}, based on the probability.
+     * {@code occursWithProbability(0.3)} retorna {@code true}
+     * aproximadamente 30% das vezes.</p>
+     *
+     * @param probability valor entre 0.0 (nunca) e 1.0 (sempre)
+     * @return {@code true} ou {@code false}, baseado na probabilidade
      */
     public static boolean occursWithProbability(double probability) {
         return random.nextDouble() < probability;
     }
 
     /**
-     * Picks a random element from the given array.
+     * Escolhe um elemento aleatório do array fornecido.
      *
-     * @param <T> The generic type of the array.
+     * @param <T> tipo genérico do array
-     * @param array The array to choose from.
+     * @param array array de onde escolher
-     * @return A randomly selected element from the array.
+     * @return elemento selecionado aleatoriamente
-     * @throws IllegalArgumentException if the array is null or empty.
+     * @throws IllegalArgumentException se o array for null ou vazio
      */
     public static <T> T chooseRandom(T[] array) {
         if (array == null || array.length == 0) {
@@ -90,12 +88,13 @@ public class RandomGenerator {
     }
 
     /**
-     * Sets the seed of the shared random number generator.
+     * Define a seed do gerador de números aleatórios partilhado.
-     * This is extremely useful for debugging and testing, as it allows
-     * the simulation to be run multiple times with the *exact same*
-     * sequence of "random" events, making the results reproducible.
      * 
-     * @param seed The seed to use.
+     * <p>Extremamente útil para debugging e testes, pois permite executar
+     * a simulação múltiplas vezes com a mesma sequência de eventos "aleatórios",
+     * tornando os resultados reproduzíveis.</p>
+     *
+     * @param seed seed a usar
      */
     public static void setSeed(long seed) {
         random.setSeed(seed);

main/src/main/java/sd/util/StatisticsCollector.java

@@ -1,379 +0,0 @@
-package sd.util;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-import sd.config.SimulationConfig;
-import sd.model.Intersection;
-import sd.model.Vehicle;
-import sd.model.VehicleType;
-
-/**
- * Collects, manages, and reports statistics throughout the simulation.
- * * This class acts as the central bookkeeper for simulation metrics. It tracks:
- * - Overall system statistics (total vehicles, completion time, wait time).
- * - Per-vehicle-type statistics (counts, average wait time by type).
- * - Per-intersection statistics (arrivals, departures).
- * * It also maintains "in-flight" data, such as the arrival time of a
- * vehicle at its *current* intersection, which is necessary to
- * calculate waiting time when the vehicle later departs.
- */
-public class StatisticsCollector {
-    
-    // --- Vehicle tracking (for in-flight vehicles) ---
-    
-    /**
-     * Tracks the simulation time when a vehicle arrives at its *current* intersection.
-     * This is used later to calculate waiting time (Depart_Time - Arrive_Time).
-     * Key: Vehicle ID (String)
-     * Value: Arrival Time (Double)
-     */
-    private final Map<String, Double> vehicleArrivalTimes;
-    
-    /**
-     * Tracks the sequence of intersections a vehicle has visited.
-     * Key: Vehicle ID (String)
-     * Value: List of Intersection IDs (String)
-     */
-    private final Map<String, List<String>> vehicleIntersectionHistory;
-    
-    // --- Overall system statistics ---
-    
-    /** Total number of vehicles created by the {@link VehicleGenerator}. */
-    private int totalVehiclesGenerated;
-    
-    /** Total number of vehicles that have reached their final destination ("S"). */
-    private int totalVehiclesCompleted;
-    
-    /** The sum of all *completed* vehicles' total travel times. Used for averaging. */
-    private double totalSystemTime;
-    
-    /** The sum of all *completed* vehicles' total waiting times. Used for averaging. */
-    private double totalWaitingTime;
-    
-    // --- Per-vehicle-type statistics ---
-    
-    /**
-     * Tracks the total number of vehicles generated, broken down by type.
-     * Key: {@link VehicleType}
-     * Value: Count (Integer)
-     */
-    private final Map<VehicleType, Integer> vehicleTypeCount;
-    
-    /**
-     * Tracks the total waiting time, broken down by vehicle type.
-     * Key: {@link VehicleType}
-     * Value: Total Wait Time (Double)
-     */
-    private final Map<VehicleType, Double> vehicleTypeWaitTime;
-    
-    // --- Per-intersection statistics ---
-    
-    /**
-     * A map to hold statistics objects for each intersection.
-     * Key: Intersection ID (String)
-     * Value: {@link IntersectionStats} object
-     */
-    private final Map<String, IntersectionStats> intersectionStats;
-    
-    /**
-     * Constructs a new StatisticsCollector.
-     * Initializes all maps and counters.
-     *
-     * @param config The {@link SimulationConfig} (not currently used, but
-     * could be for configuration-dependent stats).
-     */
-    public StatisticsCollector(SimulationConfig config) {
-        this.vehicleArrivalTimes = new HashMap<>();
-        this.vehicleIntersectionHistory = new HashMap<>();
-        this.totalVehiclesGenerated = 0;
-        this.totalVehiclesCompleted = 0;
-        this.totalSystemTime = 0.0;
-        this.totalWaitingTime = 0.0;
-        this.vehicleTypeCount = new HashMap<>();
-        this.vehicleTypeWaitTime = new HashMap<>();
-        this.intersectionStats = new HashMap<>();
-        
-        // Initialize vehicle type counters to 0
-        for (VehicleType type : VehicleType.values()) {
-            vehicleTypeCount.put(type, 0);
-            vehicleTypeWaitTime.put(type, 0.0);
-        }
-    }
-    
-    /**
-     * Records that a new vehicle has been generated.
-     * This is called by the {@link sd.engine.SimulationEngine}
-     * during a {@code VEHICLE_GENERATION} event.
-     *
-     * @param vehicle The {@link Vehicle} that was just created.
-     * @param currentTime The simulation time of the event.
-     */
-    public void recordVehicleGeneration(Vehicle vehicle, double currentTime) {
-        totalVehiclesGenerated++;
-        
-        // Track by vehicle type
-        VehicleType type = vehicle.getType();
-        vehicleTypeCount.put(type, vehicleTypeCount.get(type) + 1);
-        
-        // Initialize history tracking for this vehicle
-        vehicleIntersectionHistory.put(vehicle.getId(), new ArrayList<>());
-    }
-    
-    /**
-     * Records that a vehicle has arrived at an intersection queue.
-     * This is called by the {@link sd.engine.SimulationEngine}
-     * during a {@code VEHICLE_ARRIVAL} event.
-     *
-     * @param vehicle The {@link Vehicle} that arrived.
-     * @param intersectionId The ID of the intersection it arrived at.
-     * @param currentTime The simulation time of the arrival.
-     */
-    public void recordVehicleArrival(Vehicle vehicle, String intersectionId, double currentTime) {
-        // Store arrival time - this is the "start waiting" time
-        vehicleArrivalTimes.put(vehicle.getId(), currentTime);
-        
-        // Track intersection history
-        List<String> history = vehicleIntersectionHistory.get(vehicle.getId());
-        if (history != null) {
-            history.add(intersectionId);
-        }
-        
-        // Update per-intersection statistics
-        getOrCreateIntersectionStats(intersectionId).recordArrival();
-    }
-    
-    /**
-     * Records that a vehicle has completed its route and exited the system.
-     * This is where final metrics for the vehicle are aggregated.
-     * This is called by the {@link sd.engine.SimulationEngine}
-     * when a vehicle reaches destination "S".
-     *
-     * @param vehicle The {@link Vehicle} that is exiting.
-     * @param currentTime The simulation time of the exit.
-     */
-    public void recordVehicleExit(Vehicle vehicle, double currentTime) {
-        totalVehiclesCompleted++;
-        
-        // Calculate and aggregate total system time
-        double systemTime = vehicle.getTotalTravelTime(currentTime);
-        totalSystemTime += systemTime;
-        
-        // Aggregate waiting time
-        double waitTime = vehicle.getTotalWaitingTime();
-        totalWaitingTime += waitTime;
-        
-        // Aggregate waiting time by vehicle type
-        VehicleType type = vehicle.getType();
-        vehicleTypeWaitTime.put(type, vehicleTypeWaitTime.get(type) + waitTime);
-        
-        // Clean up tracking maps to save memory
-        vehicleArrivalTimes.remove(vehicle.getId());
-        vehicleIntersectionHistory.remove(vehicle.getId());
-    }
-    
-    /**
-     * Gets the time a vehicle arrived at its *current* intersection.
-     * This is used by the {@link sd.engine.SimulationEngine} to calculate
-     * wait time just before the vehicle crosses.
-     *
-     * @param vehicle The {@link Vehicle} to check.
-     * @return The arrival time, or 0.0 if not found.
-     */
-    public double getArrivalTime(Vehicle vehicle) {
-        return vehicleArrivalTimes.getOrDefault(vehicle.getId(), 0.0);
-    }
-    
-    /**
-     * Prints a "snapshot" of the current simulation statistics.
-     * This is called periodically by the {@link sd.engine.SimulationEngine}
-     * during a {@code STATISTICS_UPDATE} event.
-     *
-     * @param intersections A map of all intersections (to get queue data).
-     * @param currentTime The current simulation time.
-     */
-    public void printCurrentStatistics(Map<String, Intersection> intersections, double currentTime) {
-        System.out.printf("--- Statistics at t=%.2f ---%n", currentTime);
-        System.out.printf("Vehicles: Generated=%d, Completed=%d, In-System=%d%n",
-            totalVehiclesGenerated,
-            totalVehiclesCompleted,
-            totalVehiclesGenerated - totalVehiclesCompleted);
-        
-        if (totalVehiclesCompleted > 0) {
-            System.out.printf("Average System Time (so far): %.2fs%n", totalSystemTime / totalVehiclesCompleted);
-            System.out.printf("Average Waiting Time (so far): %.2fs%n", totalWaitingTime / totalVehiclesCompleted);
-        }
-        
-        // Print per-intersection queue sizes
-        System.out.println("\nIntersection Queues:");
-        for (Map.Entry<String, Intersection> entry : intersections.entrySet()) {
-            String id = entry.getKey();
-            Intersection intersection = entry.getValue();
-            System.out.printf("  %s: Queue=%d, Received=%d, Sent=%d%n",
-                id,
-                intersection.getTotalQueueSize(),
-                intersection.getTotalVehiclesReceived(),
-                intersection.getTotalVehiclesSent());
-        }
-    }
-    
-    /**
-     * Prints the final simulation summary statistics at the end of the run.
-     *
-     * @param intersections A map of all intersections.
-     * @param currentTime The final simulation time.
-     */
-    public void printFinalStatistics(Map<String, Intersection> intersections, double currentTime) {
-        System.out.println("\n=== SIMULATION SUMMARY ===");
-        System.out.printf("Duration: %.2f seconds%n", currentTime);
-        System.out.printf("Total Vehicles Generated: %d%n", totalVehiclesGenerated);
-        System.out.printf("Total Vehicles Completed: %d%n", totalVehiclesCompleted);
-        System.out.printf("Vehicles Still in System: %d%n", totalVehiclesGenerated - totalVehiclesCompleted);
-        
-        // Overall averages
-        if (totalVehiclesCompleted > 0) {
-            System.out.printf("%nAVERAGE METRICS (for completed vehicles):%n");
-            System.out.printf("  System Time: %.2f seconds%n", totalSystemTime / totalVehiclesCompleted);
-            System.out.printf("  Waiting Time: %.2f seconds%n", totalWaitingTime / totalVehiclesCompleted);
-            System.out.printf("  Throughput: %.2f vehicles/second%n", totalVehiclesCompleted / currentTime);
-        }
-        
-        // Vehicle type breakdown
-        System.out.println("\nVEHICLE TYPE DISTRIBUTION:");
-        for (VehicleType type : VehicleType.values()) {
-            int count = vehicleTypeCount.get(type);
-            if (count > 0) {
-                double percentage = (count * 100.0) / totalVehiclesGenerated;
-                // Calculate avg wait *only* for this type
-                // This assumes all generated vehicles of this type *completed*
-                // A more accurate way would be to track completed vehicle types
-                double avgWait = vehicleTypeWaitTime.get(type) / count; 
-                System.out.printf("  %s: %d (%.1f%%), Avg Wait: %.2fs%n",
-                    type, count, percentage, avgWait);
-            }
-        }
-        
-        // Per-intersection statistics
-        System.out.println("\nINTERSECTION STATISTICS:");
-        for (Map.Entry<String, Intersection> entry : intersections.entrySet()) {
-            String id = entry.getKey();
-            Intersection intersection = entry.getValue();
-            
-            System.out.printf("  %s:%n", id);
-            System.out.printf("    Vehicles Received: %d%n", intersection.getTotalVehiclesReceived());
-            System.out.printf("    Vehicles Sent: %d%n", intersection.getTotalVehiclesSent());
-            System.out.printf("    Final Queue Size: %d%n", intersection.getTotalQueueSize());
-            
-            // Traffic light details
-            intersection.getTrafficLights().forEach(light -> {
-                System.out.printf("      Light %s: State=%s, Queue=%d, Processed=%d%n",
-                    light.getDirection(),
-                    light.getState(),
-                    light.getQueueSize(),
-                    light.getTotalVehiclesProcessed());
-            });
-        }
-        
-        // System health indicators
-        System.out.println("\nSYSTEM HEALTH:");
-        int totalQueuedVehicles = intersections.values().stream()
-            .mapToInt(Intersection::getTotalQueueSize)
-            .sum();
-        System.out.printf("  Total Queued Vehicles (at end): %d%n", totalQueuedVehicles);
-        
-        if (totalVehiclesGenerated > 0) {
-            double completionRate = (totalVehiclesCompleted * 100.0) / totalVehiclesGenerated;
-            System.out.printf("  Completion Rate: %.1f%%%n", completionRate);
-        }
-    }
-    
-    /**
-     * Gets or creates the statistics object for a given intersection.
-     * Uses {@code computeIfAbsent} for efficient, thread-safe-like instantiation.
-     *
-     * @param intersectionId The ID of the intersection.
-     * @return The {@link IntersectionStats} object for that ID.
-     */
-    private IntersectionStats getOrCreateIntersectionStats(String intersectionId) {
-        // If 'intersectionId' is not in the map, create a new IntersectionStats()
-        // and put it in the map, then return it.
-        // Otherwise, just return the one that's already there.
-        return intersectionStats.computeIfAbsent(intersectionId, k -> new IntersectionStats());
-    }
-    
-    /**
-     * Inner class to track per-intersection statistics.
-     * This is a simple data holder.
-     */
-    private static class IntersectionStats {
-        private int totalArrivals;
-        private int totalDepartures;
-        
-        public IntersectionStats() {
-            this.totalArrivals = 0;
-            this.totalDepartures = 0;
-        }
-        
-        public void recordArrival() {
-            totalArrivals++;
-        }
-        
-        public void recordDeparture() {
-            totalDepartures++;
-        }
-        
-        public int getTotalArrivals() {
-            return totalArrivals;
-        }
-        
-        public int getTotalDepartures() {
-            return totalDepartures;
-        }
-    }
-    
-    // --- Public Getters for Final Statistics ---
-    
-    /**
-     * @return Total vehicles generated during the simulation.
-     */
-    public int getTotalVehiclesGenerated() {
-        return totalVehiclesGenerated;
-    }
-    
-    /**
-     * @return Total vehicles that completed their route.
-     */
-    public int getTotalVehiclesCompleted() {
-        return totalVehiclesCompleted;
-    }
-    
-    /**
-     * @return The sum of all travel times for *completed* vehicles.
-     */
-    public double getTotalSystemTime() {
-        return totalSystemTime;
-    }
-    
-    /**
-     * @return The sum of all waiting times for *completed* vehicles.
-     */
-    public double getTotalWaitingTime() {
-        return totalWaitingTime;
-    }
-    
-    /**
-     * @return The average travel time for *completed* vehicles.
-     */
-    public double getAverageSystemTime() {
-        return totalVehiclesCompleted > 0 ? totalSystemTime / totalVehiclesCompleted : 0.0;
-    }
-    
-    /**
-     * @return The average waiting time for *completed* vehicles.
-     */
-    public double getAverageWaitingTime() {
-        return totalVehiclesCompleted > 0 ? totalWaitingTime / totalVehiclesCompleted : 0.0;
-    }
-}

main/src/main/java/sd/util/VehicleGenerator.java

@@ -1,145 +1,115 @@
 package sd.util;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
+import java.util.Map;
 
 import sd.config.SimulationConfig;
 import sd.model.Vehicle;
 import sd.model.VehicleType;
+import sd.routing.RouteSelector;
 
 /**
- * Generates vehicles for the simulation.
+ * Gera veículos para a simulação.
- * * This class is responsible for two key tasks:
+ * 
- * 1.  Determining *when* the next vehicle should arrive, based on the
+ * <p>Esta classe é responsável por duas tarefas principais:</p>
- * arrival model (POISSON or FIXED) from the {@link SimulationConfig}.
+ * <ol>
- * 2.  Creating a new {@link Vehicle} object with a randomly selected
+ *   <li>Determinar <em>quando</em> o próximo veículo deve chegar, baseado no
- * type (e.g., BIKE, LIGHT) and a randomly selected route.
+ *       modelo de chegada (POISSON ou FIXED) da {@link SimulationConfig}</li>
- * * Routes are predefined and organized by entry point (E1, E2, E3).
+ *   <li>Criar um novo objeto {@link Vehicle} com tipo e rota selecionados pela
+ *       política de roteamento configurada ({@link RouteSelector})</li>
+ * </ol>
+ * 
+ * <p>As rotas são selecionadas usando uma política de roteamento que pode ser:
+ * aleatória, caminho mais curto, menor congestionamento, etc.</p>
  */
 public class VehicleGenerator {
     
     private final SimulationConfig config;
     private final String arrivalModel;
-    private final double arrivalRate;      // Lambda (λ) for POISSON
+    /** Lambda (λ) para modelo POISSON */
-    private final double fixedInterval;    // Interval for FIXED
+    private final double arrivalRate;
+    /** Intervalo para modelo FIXED */
+    private final double fixedInterval;
     
-    // --- Predefined Routes ---
+    /** Política de roteamento usada para selecionar rotas */
-    // These lists store all possible routes, grouped by where they start.
+    private RouteSelector routeSelector;
-    
-    /** Routes starting from entry point E1. */
-    private final List<RouteWithProbability> e1Routes;
-    /** Routes starting from entry point E2. */
-    private final List<RouteWithProbability> e2Routes;
-    /** Routes starting from entry point E3. */
-    private final List<RouteWithProbability> e3Routes;
     
     /**
-     * Constructs a new VehicleGenerator.
+     * Cria um novo gerador de veículos com a política de roteamento especificada.
-     * It reads the necessary configuration and initializes the
+     * Lê a configuração necessária.
-     * predefined routes.
      *
-     * @param config The {@link SimulationConfig} object.
+     * @param config objeto de {@link SimulationConfig}
+     * @param routeSelector política de roteamento a usar para selecionar rotas
      */
-    public VehicleGenerator(SimulationConfig config) {
+    public VehicleGenerator(SimulationConfig config, RouteSelector routeSelector) {
         this.config = config;
+        this.routeSelector = routeSelector;
         
         // Cache configuration values for performance
         this.arrivalModel = config.getArrivalModel();
         this.arrivalRate = config.getArrivalRate();
         this.fixedInterval = config.getFixedArrivalInterval();
-        
-        // Initialize route lists
-        this.e1Routes = new ArrayList<>();
-        this.e2Routes = new ArrayList<>();
-        this.e3Routes = new ArrayList<>();
-        initializePossibleRoutes();
     }
     
     /**
-     * Defines all possible routes that vehicles can take, organized by
+     * Calcula o tempo <em>absoluto</em> da próxima chegada de veículo
-     * their entry point (E1, E2, E3). Each route is given a
+     * baseado no modelo configurado.
-     * probability, which determines how often it's chosen.
+     * 
-     */
+     * @param currentTime tempo atual da simulação, usado como base
-    private void initializePossibleRoutes() {
+     * @return tempo absoluto (ex: {@code currentTime + intervalo})
-        // E1 routes (Starts at Cr1)
+     *         em que o próximo veículo deve ser gerado
-        e1Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr1", "Cr4", "Cr5", "S"), 0.34)); // E1 -> Cr1 -> Cr4 -> Cr5 -> Exit
-        e1Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr1", "Cr2", "Cr5", "S"), 0.33)); // E1 -> Cr1 -> Cr2 -> Cr5 -> Exit
-        e1Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr1", "Cr2", "Cr3", "S"), 0.33)); // E1 -> Cr1 -> Cr2 -> Cr3 -> Exit
-        
-        // E2 routes (Starts at Cr2)
-        e2Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr2", "Cr5", "S"), 0.34)); // E2 -> Cr2 -> Cr5 -> Exit
-        e2Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr2", "Cr3", "S"), 0.33)); // E2 -> Cr2 -> Cr3 -> Exit
-        e2Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr2", "Cr1", "Cr4", "Cr5", "S"), 0.33)); // E2 -> Cr2 -> ... -> Exit
-        
-        // E3 routes (Starts at Cr3)
-        e3Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr3", "S"), 0.34)); // E3 -> Cr3 -> Exit
-        e3Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr3", "Cr2", "Cr5", "S"), 0.33)); // E3 -> Cr3 -> Cr2 -> Cr5 -> Exit
-        e3Routes.add(new RouteWithProbability(
-            Arrays.asList("Cr3", "Cr2", "Cr1", "Cr4", "Cr5", "S"), 0.33)); // E3 -> Cr3 -> ... -> Exit
-    }
-    
-    /**
-     * Calculates the *absolute* time of the next vehicle arrival
-     * based on the configured model.
-     * * @param currentTime The current simulation time, used as the base.
-     * @return The absolute time (e.g., {@code currentTime + interval})
-     * when the next vehicle should be generated.
      */
     public double getNextArrivalTime(double currentTime) {
         if ("POISSON".equalsIgnoreCase(arrivalModel)) {
-            // For a Poisson process, the time *between* arrivals
-            // follows an exponential distribution.
             double interval = RandomGenerator.generateExponentialInterval(arrivalRate);
             return currentTime + interval;
         } else {
-            // For a Fixed model, the interval is constant.
             return currentTime + fixedInterval;
         }
     }
     
     /**
-     * Generates a new {@link Vehicle} object.
+     * Gera um novo objeto {@link Vehicle}.
-     * This involves:
-     * 1. Selecting a random {@link VehicleType} based on probabilities.
-     * 2. Selecting a random route (entry point + path) based on probabilities.
      * 
-     * @param vehicleId The unique identifier for the new vehicle (e.g., "V123").
+     * <p>Passos executados:</p>
-     * @param entryTime The simulation time when this vehicle is being created.
+     * <ol>
-     * @return A new, configured {@link Vehicle} object.
+     *   <li>Seleciona um {@link VehicleType} aleatório baseado em probabilidades</li>
+     *   <li>Seleciona um ponto de entrada aleatório (E1, E2, E3)</li>
+     *   <li>Usa a política de roteamento para escolher a rota</li>
+     * </ol>
+     *
+     * @param vehicleId identificador único do novo veículo (ex: "V123")
+     * @param entryTime tempo de simulação em que o veículo é criado
+     * @param queueSizes mapa com tamanho das filas (opcional, pode ser null)
+     * @return novo objeto {@link Vehicle} configurado
      */
-    public Vehicle generateVehicle(String vehicleId, double entryTime) {
+    public Vehicle generateVehicle(String vehicleId, double entryTime, Map<String, Integer> queueSizes) {
         VehicleType type = selectVehicleType();
-        List<String> route = selectRandomRoute();
+        String entryPoint = selectRandomEntryPoint();
+        List<String> route = routeSelector.selectRoute(entryPoint, queueSizes);
         
         return new Vehicle(vehicleId, type, entryTime, route);
     }
     
     /**
-     * Selects a {@link VehicleType} (BIKE, LIGHT, HEAVY) based on the
+     * Seleciona um {@link VehicleType} (BIKE, LIGHT, HEAVY) baseado nas
-     * probabilities defined in the {@link SimulationConfig}.
+     * probabilidades definidas na {@link SimulationConfig}.
-     * * Uses a standard "cumulative probability" technique:
-     * 1. Get a random number {@code rand} from [0, 1).
-     * 2. If {@code rand < P(Bike)}, return BIKE.
-     * 3. Else if {@code rand < P(Bike) + P(Light)}, return LIGHT.
-     * 4. Else, return HEAVY.
      * 
-     * @return The selected {@link VehicleType}.
+     * <p>Usa técnica de "probabilidade cumulativa":</p>
+     * <ol>
+     *   <li>Obtém número aleatório {@code rand} de [0, 1)</li>
+     *   <li>Se {@code rand < P(Bike)}, retorna BIKE</li>
+     *   <li>Senão se {@code rand < P(Bike) + P(Light)}, retorna LIGHT</li>
+     *   <li>Caso contrário, retorna HEAVY</li>
+     * </ol>
+     *
+     * @return tipo de veículo selecionado
      */
     private VehicleType selectVehicleType() {
         double bikeProbability = config.getBikeVehicleProbability();
         double lightProbability = config.getLightVehicleProbability();
         double heavyProbability = config.getHeavyVehicleProbability();
         
-        // Normalize probabilities in case they don't sum to exactly 1.0
         double total = bikeProbability + lightProbability + heavyProbability;
         if (total == 0) return VehicleType.LIGHT; // Avoid division by zero
         bikeProbability /= total;
@@ -157,73 +127,46 @@ public class VehicleGenerator {
     }
     
     /**
-     * Selects a random route for a new vehicle.
+     * Seleciona aleatoriamente um ponto de entrada (E1, E2 ou E3).
-     * This is a two-step process:
+     * Cada ponto tem probabilidade igual (1/3).
-     * 1. Randomly select an entry point (E1, E2, or E3) with equal probability.
-     * 2. From the chosen entry point's list of routes, select one
-     * based on their defined probabilities (using cumulative probability).
      *
-     * @return A {@link List} of strings representing the chosen route (e.g., ["Cr1", "Cr4", "S"]).
+     * @return ponto de entrada selecionado ("E1", "E2" ou "E3")
      */
-    private List<String> selectRandomRoute() {
+    private String selectRandomEntryPoint() {
-        // Step 1: Randomly select an entry point (E1, E2, or E3)
+        double rand = Math.random();
-        double entryRandom = Math.random();
-        List<RouteWithProbability> selectedRoutes;
         
-        if (entryRandom < 0.333) {
+        if (rand < 0.333) {
-            selectedRoutes = e1Routes;
+            return "E1";
-        } else if (entryRandom < 0.666) {
+        } else if (rand < 0.666) {
-            selectedRoutes = e2Routes;
+            return "E2";
         } else {
-            selectedRoutes = e3Routes;
+            return "E3";
-        }
-        
-        // Step 2: Select a route from the chosen list based on cumulative probabilities
-        double routeRand = Math.random();
-        double cumulative = 0.0;
-        
-        for (RouteWithProbability routeWithProb : selectedRoutes) {
-            cumulative += routeWithProb.probability;
-            if (routeRand <= cumulative) {
-                // Return a *copy* of the route to prevent modification
-                return new ArrayList<>(routeWithProb.route);
         }
     }
     
-        // Fallback: This should only be reached if probabilities don't sum to 1
+    /**
-        // (due to floating point errors)
+     * Altera dinamicamente o RouteSelector usado para gerar rotas.
-        return new ArrayList<>(selectedRoutes.get(0).route);
+     * Permite mudar a política de roteamento durante a simulação.
+     * 
+     * @param newRouteSelector novo seletor de rotas
+     */
+    public void setRouteSelector(RouteSelector newRouteSelector) {
+        // Note: In Java, we can't directly modify the 'final' field,
+        // but we can create a new VehicleGenerator with the new selector.
+        // For this implementation, we'll need to remove 'final' from routeSelector.
+        // This is acceptable since we want dynamic policy changes.
+        throw new UnsupportedOperationException(
+            "VehicleGenerator is immutable. Use CoordinatorProcess.changeRoutingPolicy() instead."
+        );
     }
 
     /**
      * @return A string providing information about the generator's configuration.
      */
     public String getInfo() {
-        int totalRoutes = e1Routes.size() + e2Routes.size() + e3Routes.size();
         return String.format(
-            "VehicleGenerator{model=%s, rate=%.2f, interval=%.2f, routes=%d (E1:%d, E2:%d, E3:%d)}",
+            "VehicleGenerator{model=%s, rate=%.2f, interval=%.2f, routeSelector=%s}",
-            arrivalModel, arrivalRate, fixedInterval, totalRoutes,
+            arrivalModel, arrivalRate, fixedInterval, routeSelector.getClass().getSimpleName()
-            e1Routes.size(), e2Routes.size(), e3Routes.size()
         );
     }
-    
-    /**
-     * A private inner "struct-like" class to hold a route (a List of strings)
-     * and its associated selection probability.
-     */
-    private static class RouteWithProbability {
-        final List<String> route;
-        final double probability;
-        
-        /**
-         * Constructs a new RouteWithProbability pair.
-         * @param route The list of intersection IDs.
-         * @param probability The probability (0.0 to 1.0) of this route
-         * being chosen *from its entry group*.
-         */
-        RouteWithProbability(List<String> route, double probability) {
-            this.route = route;
-            this.probability = probability;
-        }
-    }
 }

main/src/main/resources/dashboard.css

@@ -0,0 +1,142 @@
+/* Global Styles */
+.root {
+    -fx-background-color: #f4f7f6;
+    -fx-font-family: 'Segoe UI', sans-serif;
+}
+
+/* Header */
+.header {
+    -fx-background-color: linear-gradient(to right, #2c3e50, #4ca1af);
+    -fx-padding: 20;
+    -fx-effect: dropshadow(three-pass-box, rgba(0,0,0,0.2), 10, 0, 0, 5);
+}
+
+.header-title {
+    -fx-font-size: 28px;
+    -fx-font-weight: bold;
+    -fx-text-fill: white;
+}
+
+.header-subtitle {
+    -fx-font-size: 16px;
+    -fx-text-fill: #ecf0f1;
+}
+
+/* Buttons */
+.button-start {
+    -fx-background-color: #2ecc71;
+    -fx-text-fill: white;
+    -fx-font-weight: bold;
+    -fx-padding: 10 20;
+    -fx-background-radius: 5;
+    -fx-cursor: hand;
+    -fx-effect: dropshadow(three-pass-box, rgba(0,0,0,0.1), 5, 0, 0, 2);
+}
+
+.button-start:hover {
+    -fx-background-color: #27ae60;
+}
+
+.button-start:disabled {
+    -fx-background-color: #95a5a6;
+    -fx-opacity: 0.7;
+}
+
+.button-stop {
+    -fx-background-color: #e74c3c;
+    -fx-text-fill: white;
+    -fx-font-weight: bold;
+    -fx-padding: 10 20;
+    -fx-background-radius: 5;
+    -fx-cursor: hand;
+    -fx-effect: dropshadow(three-pass-box, rgba(0,0,0,0.1), 5, 0, 0, 2);
+}
+
+.button-stop:hover {
+    -fx-background-color: #c0392b;
+}
+
+.button-stop:disabled {
+    -fx-background-color: #95a5a6;
+    -fx-opacity: 0.7;
+}
+
+/* Cards / Panels */
+.card {
+    -fx-background-color: white;
+    -fx-background-radius: 8;
+    -fx-effect: dropshadow(three-pass-box, rgba(0,0,0,0.05), 10, 0, 0, 2);
+    -fx-padding: 0; 
+}
+
+.card-header {
+    -fx-background-color: #ecf0f1;
+    -fx-background-radius: 8 8 0 0;
+    -fx-padding: 10 15;
+    -fx-border-color: #bdc3c7;
+    -fx-border-width: 0 0 1 0;
+}
+
+.card-title {
+    -fx-font-size: 16px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #2c3e50;
+}
+
+.card-content {
+    -fx-padding: 15;
+}
+
+/* Statistics Grid */
+.stat-label {
+    -fx-font-size: 14px;
+    -fx-text-fill: #7f8c8d;
+}
+
+.stat-value {
+    -fx-font-size: 20px;
+    -fx-font-weight: bold;
+    -fx-text-fill: #2980b9;
+}
+
+/* Tables */
+.table-view {
+    -fx-background-color: transparent;
+    -fx-border-color: transparent;
+}
+
+.table-view .column-header-background {
+    -fx-background-color: #ecf0f1;
+    -fx-border-color: #bdc3c7;
+    -fx-border-width: 0 0 1 0;
+}
+
+.table-view .column-header .label {
+    -fx-text-fill: #2c3e50;
+    -fx-font-weight: bold;
+}
+
+.table-row-cell {
+    -fx-background-color: white;
+    -fx-border-color: transparent;
+}
+
+.table-row-cell:odd {
+    -fx-background-color: #f9f9f9;
+}
+
+.table-row-cell:selected {
+    -fx-background-color: #3498db;
+    -fx-text-fill: white;
+}
+
+/* Footer */
+.footer {
+    -fx-background-color: #34495e;
+    -fx-padding: 10 20;
+}
+
+.footer-text {
+    -fx-text-fill: #ecf0f1;
+    -fx-font-size: 12px;
+}

main/src/main/resources/network_config.json

@@ -0,0 +1,46 @@
+{
+  "intersections": [
+    {
+      "id": "Cr1",
+      "lights": ["East", "South"],
+      "routes": {
+        "Cr2": "East",
+        "Cr4": "South"
+      }
+    },
+    {
+      "id": "Cr2",
+      "lights": ["West", "East", "South"],
+      "routes": {
+        "Cr1": "West",
+        "Cr3": "East",
+        "Cr5": "South"
+      }
+    },
+    {
+      "id": "Cr3",
+      "lights": ["West", "South"],
+      "routes": {
+        "Cr2": "West",
+        "S": "South"
+      }
+    },
+    {
+      "id": "Cr4",
+      "lights": ["East", "North"],
+      "routes": {
+        "Cr1": "North",
+        "Cr5": "East"
+      }
+    },
+    {
+      "id": "Cr5",
+      "lights": ["East", "West", "North"],
+      "routes": {
+        "Cr2": "North",
+        "Cr4": "West",
+        "S": "East"
+      }
+    }
+  ]
+}

main/src/main/resources/simulation-high.properties

@@ -0,0 +1,126 @@
+# =========================================================
+# Traffic Simulation Configuration - HIGH LOAD SCENARIO
+# ---------------------------------------------------------
+# High traffic scenario for testing system under heavy load.
+# Expected: Significant congestion, large queues, system stress test
+# =========================================================
+
+# === NETWORK CONFIGURATION ===
+
+# Intersections (each with its host and port)
+intersection.Cr1.host=localhost
+intersection.Cr1.port=8001
+intersection.Cr2.host=localhost
+intersection.Cr2.port=8002
+intersection.Cr3.host=localhost
+intersection.Cr3.port=8003
+intersection.Cr4.host=localhost
+intersection.Cr4.port=8004
+intersection.Cr5.host=localhost
+intersection.Cr5.port=8005
+
+# Exit node
+exit.host=localhost
+exit.port=9001
+
+# Dashboard server
+dashboard.host=localhost
+dashboard.port=9000
+
+
+# === SIMULATION CONFIGURATION ===
+
+# Total duration in seconds (1800 = 30 minutes)
+simulation.duration=1800
+
+# Vehicle arrival model: FIXED or POISSON
+simulation.arrival.model=POISSON
+
+# λ (lambda): HIGH LOAD = 1.0 vehicle per second (60 vehicles/minute, 3600 vehicles/hour)
+# This is 2x medium load - tests system capacity limits
+simulation.arrival.rate=1.0
+
+# Fixed interval between arrivals (only used if model=FIXED)
+simulation.arrival.fixed.interval=2.0
+
+# Routing policy: RANDOM, SHORTEST_PATH, LEAST_CONGESTED
+simulation.routing.policy=LEAST_CONGESTED
+
+
+# === TRAFFIC LIGHT TIMINGS ===
+# Format: trafficlight.<intersection>.<direction>.<state>=<seconds>
+# Aggressive timings to maximize throughput under high load
+
+# Intersection 1 (Entry point - longer greens to prevent early backup)
+trafficlight.Cr1.South.green=60.0
+trafficlight.Cr1.South.red=3.0
+trafficlight.Cr1.East.green=60.0
+trafficlight.Cr1.East.red=3.0
+
+# Intersection 2 (Main hub - CRITICAL BOTTLENECK, maximum green times)
+# This is the most critical intersection - all routes converge here
+trafficlight.Cr2.South.green=70.0
+trafficlight.Cr2.South.red=3.0
+trafficlight.Cr2.East.green=80.0
+trafficlight.Cr2.East.red=3.0
+trafficlight.Cr2.West.green=70.0
+trafficlight.Cr2.West.red=3.0
+
+# Intersection 3 (Path to exit - maximize East throughput to exit)
+trafficlight.Cr3.South.green=50.0
+trafficlight.Cr3.South.red=3.0
+trafficlight.Cr3.West.green=40.0
+trafficlight.Cr3.West.red=3.0
+
+# Intersection 4 (High throughput needed toward Cr5)
+trafficlight.Cr4.East.green=70.0
+trafficlight.Cr4.East.red=3.0
+trafficlight.Cr4.North.green=70.0
+trafficlight.Cr4.North.red=3.0
+
+# Intersection 5 (Near exit - MAJOR BOTTLENECK, longest green time)
+# All routes funnel through here before exit
+trafficlight.Cr5.East.green=90.0
+trafficlight.Cr5.East.red=3.0
+trafficlight.Cr5.West.green=70.0
+trafficlight.Cr5.West.red=3.0
+trafficlight.Cr5.North.green=70.0
+trafficlight.Cr5.North.red=3.0
+
+
+# === VEHICLE CONFIGURATION ===
+# Probability distribution for vehicle types (must sum to 1.0)
+vehicle.probability.bike=0.2
+vehicle.probability.light=0.6
+vehicle.probability.heavy=0.2
+
+# Average crossing times (in seconds)
+vehicle.crossing.time.bike=1.0
+vehicle.crossing.time.light=2.0
+vehicle.crossing.time.heavy=4.0
+
+# Travel times between intersections (in seconds)
+# Base time for light vehicles (cars)
+vehicle.travel.time.base=1.0
+# Bike travel time = 0.5 × car travel time
+vehicle.travel.time.bike.multiplier=0.5
+# Heavy vehicle travel time = 4.0 x base travel time
+vehicle.travel.time.heavy.multiplier=4.0
+
+# === STATISTICS ===
+
+# Interval between dashboard updates (seconds)
+statistics.update.interval=10.0
+
+# === EXPECTED BEHAVIOR - HIGH LOAD ===
+# - Average system time: 200-400+ seconds (3-7+ minutes)
+# - Maximum queue sizes: 15-30+ vehicles at Cr2 and Cr5
+# - Average queue sizes: 8-15+ vehicles
+# - Severe congestion at Cr2 (main convergence point)
+# - Severe congestion at Cr5 (pre-exit bottleneck)
+# - System utilization: ~80-95%
+# - Many vehicles will remain in system at simulation end
+# - Queue growth may be unbounded if arrival rate exceeds service rate
+# - Primary bottlenecks: Cr2 (3-way convergence) and Cr5 (final funnel)
+# - This scenario tests maximum system capacity and traffic light optimization
+# - Expected to demonstrate need for adaptive traffic light policies

main/src/main/resources/simulation-low.properties

@@ -0,0 +1,120 @@
+# =========================================================
+# Traffic Simulation Configuration - LOW LOAD SCENARIO
+# ---------------------------------------------------------
+# Low traffic scenario for testing system under light load.
+# Expected: No congestion, minimal queues, fast vehicle throughput
+# =========================================================
+
+# === NETWORK CONFIGURATION ===
+
+# Intersections (each with its host and port)
+intersection.Cr1.host=localhost
+intersection.Cr1.port=8001
+intersection.Cr2.host=localhost
+intersection.Cr2.port=8002
+intersection.Cr3.host=localhost
+intersection.Cr3.port=8003
+intersection.Cr4.host=localhost
+intersection.Cr4.port=8004
+intersection.Cr5.host=localhost
+intersection.Cr5.port=8005
+
+# Exit node
+exit.host=localhost
+exit.port=9001
+
+# Dashboard server
+dashboard.host=localhost
+dashboard.port=9000
+
+
+# === SIMULATION CONFIGURATION ===
+
+# Total duration in seconds (1800 = 30 minutes)
+simulation.duration=1800
+
+# Vehicle arrival model: FIXED or POISSON
+simulation.arrival.model=POISSON
+
+# λ (lambda): LOW LOAD = 0.2 vehicles per second (12 vehicles/minute, 720 vehicles/hour)
+# This is approximately 40% of medium load
+simulation.arrival.rate=0.2
+
+# Fixed interval between arrivals (only used if model=FIXED)
+simulation.arrival.fixed.interval=2.0
+
+# Routing policy: RANDOM, SHORTEST_PATH, LEAST_CONGESTED
+simulation.routing.policy=LEAST_CONGESTED
+
+
+# === TRAFFIC LIGHT TIMINGS ===
+# Format: trafficlight.<intersection>.<direction>.<state>=<seconds>
+# Standard timings - should be more than adequate for low load
+
+# Intersection 1 (Entry point - balanced)
+trafficlight.Cr1.South.green=30.0
+trafficlight.Cr1.South.red=5.0
+trafficlight.Cr1.East.green=30.0
+trafficlight.Cr1.East.red=5.0
+
+# Intersection 2 (Main hub - shorter cycles, favor East-West)
+trafficlight.Cr2.South.green=30.0
+trafficlight.Cr2.South.red=5.0
+trafficlight.Cr2.East.green=30.0
+trafficlight.Cr2.East.red=5.0
+trafficlight.Cr2.West.green=30.0
+trafficlight.Cr2.West.red=5.0
+
+# Intersection 3 (Path to exit - favor East)
+trafficlight.Cr3.South.green=30.0
+trafficlight.Cr3.South.red=5.0
+trafficlight.Cr3.West.green=30.0
+trafficlight.Cr3.West.red=5.0
+
+# Intersection 4 (Favor East toward Cr5)
+trafficlight.Cr4.East.green=30.0
+trafficlight.Cr4.East.red=5.0
+trafficlight.Cr4.North.green=30.0
+trafficlight.Cr4.North.red=5.0
+
+# Intersection 5 (Near exit - favor East)
+trafficlight.Cr5.East.green=30.0
+trafficlight.Cr5.East.red=5.0
+trafficlight.Cr5.West.green=30.0
+trafficlight.Cr5.West.red=5.0
+trafficlight.Cr5.North.green=30.0
+trafficlight.Cr5.North.red=5.0
+
+
+# === VEHICLE CONFIGURATION ===
+# Probability distribution for vehicle types (must sum to 1.0)
+vehicle.probability.bike=0.2
+vehicle.probability.light=0.6
+vehicle.probability.heavy=0.2
+
+# Average crossing times (in seconds)
+vehicle.crossing.time.bike=1.0
+vehicle.crossing.time.light=2.0
+vehicle.crossing.time.heavy=4.0
+
+# Travel times between intersections (in seconds)
+# Base time for light vehicles (cars)
+vehicle.travel.time.base=1.0
+# Bike travel time = 0.5 × car travel time
+vehicle.travel.time.bike.multiplier=0.5
+# Heavy vehicle travel time = 4.0 x base travel time
+vehicle.travel.time.heavy.multiplier=4.0
+
+# === STATISTICS ===
+
+# Interval between dashboard updates (seconds)
+statistics.update.interval=10.0
+
+# === EXPECTED BEHAVIOR - LOW LOAD ===
+# - Average system time: 40-80 seconds
+# - Maximum queue sizes: 1-3 vehicles
+# - Average queue sizes: < 1 vehicle
+# - Vehicles should flow smoothly through the system
+# - Minimal waiting at traffic lights (mostly travel time)
+# - System utilization: ~20-30%
+# - All vehicles should exit within simulation time

main/src/main/resources/simulation-medium.properties

@@ -0,0 +1,121 @@
+# =========================================================
+# Traffic Simulation Configuration - MEDIUM LOAD SCENARIO
+# ---------------------------------------------------------
+# Medium traffic scenario for testing system under normal load.
+# Expected: Moderate queues, some congestion at peak intersections
+# =========================================================
+
+# === NETWORK CONFIGURATION ===
+
+# Intersections (each with its host and port)
+intersection.Cr1.host=localhost
+intersection.Cr1.port=8001
+intersection.Cr2.host=localhost
+intersection.Cr2.port=8002
+intersection.Cr3.host=localhost
+intersection.Cr3.port=8003
+intersection.Cr4.host=localhost
+intersection.Cr4.port=8004
+intersection.Cr5.host=localhost
+intersection.Cr5.port=8005
+
+# Exit node
+exit.host=localhost
+exit.port=9001
+
+# Dashboard server
+dashboard.host=localhost
+dashboard.port=9000
+
+
+# === SIMULATION CONFIGURATION ===
+
+# Total duration in seconds (1800 = 30 minutes)
+simulation.duration=1800
+
+# Vehicle arrival model: FIXED or POISSON
+simulation.arrival.model=POISSON
+
+# λ (lambda): MEDIUM LOAD = 0.5 vehicles per second (30 vehicles/minute, 1800 vehicles/hour)
+# This represents normal traffic conditions
+simulation.arrival.rate=0.5
+
+# Fixed interval between arrivals (only used if model=FIXED)
+simulation.arrival.fixed.interval=2.0
+
+# Routing policy: RANDOM, SHORTEST_PATH, LEAST_CONGESTED
+simulation.routing.policy=LEAST_CONGESTED
+
+
+# === TRAFFIC LIGHT TIMINGS ===
+# Format: trafficlight.<intersection>.<direction>.<state>=<seconds>
+# Optimized timings for medium load
+
+# Intersection 1 (Entry point - balanced)
+trafficlight.Cr1.South.green=40.0
+trafficlight.Cr1.South.red=5.0
+trafficlight.Cr1.East.green=40.0
+trafficlight.Cr1.East.red=5.0
+
+# Intersection 2 (Main hub - CRITICAL BOTTLENECK, longer green times)
+trafficlight.Cr2.South.green=45.0
+trafficlight.Cr2.South.red=5.0
+trafficlight.Cr2.East.green=50.0
+trafficlight.Cr2.East.red=5.0
+trafficlight.Cr2.West.green=45.0
+trafficlight.Cr2.West.red=5.0
+
+# Intersection 3 (Path to exit - favor East toward exit)
+trafficlight.Cr3.South.green=40.0
+trafficlight.Cr3.South.red=5.0
+trafficlight.Cr3.West.green=35.0
+trafficlight.Cr3.West.red=5.0
+
+# Intersection 4 (Favor East toward Cr5)
+trafficlight.Cr4.East.green=40.0
+trafficlight.Cr4.East.red=5.0
+trafficlight.Cr4.North.green=40.0
+trafficlight.Cr4.North.red=5.0
+
+# Intersection 5 (Near exit - POTENTIAL BOTTLENECK, longer green)
+trafficlight.Cr5.East.green=50.0
+trafficlight.Cr5.East.red=5.0
+trafficlight.Cr5.West.green=45.0
+trafficlight.Cr5.West.red=5.0
+trafficlight.Cr5.North.green=45.0
+trafficlight.Cr5.North.red=5.0
+
+
+# === VEHICLE CONFIGURATION ===
+# Probability distribution for vehicle types (must sum to 1.0)
+vehicle.probability.bike=0.2
+vehicle.probability.light=0.6
+vehicle.probability.heavy=0.2
+
+# Average crossing times (in seconds)
+vehicle.crossing.time.bike=1.0
+vehicle.crossing.time.light=2.0
+vehicle.crossing.time.heavy=4.0
+
+# Travel times between intersections (in seconds)
+# Base time for light vehicles (cars)
+vehicle.travel.time.base=1.0
+# Bike travel time = 0.5 × car travel time
+vehicle.travel.time.bike.multiplier=0.5
+# Heavy vehicle travel time = 4.0 x base travel time
+vehicle.travel.time.heavy.multiplier=4.0
+
+# === STATISTICS ===
+
+# Interval between dashboard updates (seconds)
+statistics.update.interval=10.0
+
+# === EXPECTED BEHAVIOR - MEDIUM LOAD ===
+# - Average system time: 80-150 seconds
+# - Maximum queue sizes: 5-10 vehicles at Cr2 and Cr5
+# - Average queue sizes: 2-5 vehicles
+# - Moderate congestion at Cr2 (main hub) and Cr5 (pre-exit)
+# - System utilization: ~50-60%
+# - Most vehicles should exit, some may remain at simulation end
+# - Cr2 is the primary bottleneck (3 directions converge)
+# - Cr5 is secondary bottleneck (all routes pass through)

main/src/main/resources/simulation.properties

@@ -31,7 +31,11 @@ dashboard.port=9000
 # === SIMULATION CONFIGURATION ===
 
 # Total duration in seconds (3600 = 1 hour)
-simulation.duration=60.0
+simulation.duration=300
+
+# Time scaling factor for visualization (real_seconds = sim_seconds * scale)
+# 0 = instant (pure DES), 0.01 = 100x speed, 0.1 = 10x speed, 1.0 = real-time
+simulation.time.scale=0.01
 
 # Vehicle arrival model: FIXED or POISSON
 simulation.arrival.model=POISSON
@@ -42,59 +46,44 @@ simulation.arrival.rate=0.5
 # Fixed interval between arrivals (only used if model=FIXED)
 simulation.arrival.fixed.interval=2.0
 
+# Routing policy: RANDOM, SHORTEST_PATH, LEAST_CONGESTED
+# RANDOM: selects routes with predefined probabilities (baseline)
+# SHORTEST_PATH: always chooses the route with fewest intersections
+# LEAST_CONGESTED: dynamically chooses routes to avoid congested areas
+simulation.routing.policy=RANDOM
+
 
 # === TRAFFIC LIGHT TIMINGS ===
 # Format: trafficlight.<intersection>.<direction>.<state>=<seconds>
 
-# Intersection 1
+# Intersection 1 (Entry point - balanced)
-trafficlight.Cr1.North.green=30.0
+trafficlight.Cr1.South.green=60.0
-trafficlight.Cr1.North.red=30.0
+trafficlight.Cr1.South.red=5.0
-trafficlight.Cr1.South.green=30.0
+trafficlight.Cr1.East.green=60.0
-trafficlight.Cr1.South.red=30.0
+trafficlight.Cr1.East.red=5.0
-trafficlight.Cr1.East.green=30.0
-trafficlight.Cr1.East.red=30.0
-trafficlight.Cr1.West.green=30.0
-trafficlight.Cr1.West.red=30.0
 
-# Intersection 2
+# Intersection 2 (Main hub - shorter cycles, favor East-West)
-trafficlight.Cr2.North.green=25.0
+trafficlight.Cr2.South.green=60.0
-trafficlight.Cr2.North.red=35.0
+trafficlight.Cr2.South.red=5.0
-trafficlight.Cr2.South.green=25.0
+trafficlight.Cr2.East.green=60.0
-trafficlight.Cr2.South.red=35.0
+trafficlight.Cr2.East.red=5.0
-trafficlight.Cr2.East.green=35.0
+trafficlight.Cr2.West.green=60.0
-trafficlight.Cr2.East.red=25.0
+trafficlight.Cr2.West.red=5.0
-trafficlight.Cr2.West.green=35.0
-trafficlight.Cr2.West.red=25.0
 
-# Intersection 3
+# Intersection 3 (Path to exit - favor East)
-trafficlight.Cr3.North.green=30.0
+trafficlight.Cr3.South.green=60.0
-trafficlight.Cr3.North.red=30.0
+trafficlight.Cr3.South.red=5.0
-trafficlight.Cr3.South.green=30.0
+trafficlight.Cr3.West.green=60.0
-trafficlight.Cr3.South.red=30.0
+trafficlight.Cr3.West.red=5.0
-trafficlight.Cr3.East.green=30.0
-trafficlight.Cr3.East.red=30.0
-trafficlight.Cr3.West.green=30.0
-trafficlight.Cr3.West.red=30.0
 
-# Intersection 4
+# Intersection 4 (Favor East toward Cr5)
-trafficlight.Cr4.North.green=30.0
+trafficlight.Cr4.East.green=60.0
-trafficlight.Cr4.North.red=30.0
+trafficlight.Cr4.East.red=5.0
-trafficlight.Cr4.South.green=30.0
+
-trafficlight.Cr4.South.red=30.0
+# Intersection 5 (Near exit - favor East)
-trafficlight.Cr4.East.green=30.0
+trafficlight.Cr5.East.green=60.0
-trafficlight.Cr4.East.red=30.0
+trafficlight.Cr5.East.red=5.0
-trafficlight.Cr4.West.green=30.0
-trafficlight.Cr4.West.red=30.0
 
-# Intersection 5
-trafficlight.Cr5.North.green=30.0
-trafficlight.Cr5.North.red=30.0
-trafficlight.Cr5.South.green=30.0
-trafficlight.Cr5.South.red=30.0
-trafficlight.Cr5.East.green=30.0
-trafficlight.Cr5.East.red=30.0
-trafficlight.Cr5.West.green=30.0
-trafficlight.Cr5.West.red=30.0
 
 # === VEHICLE CONFIGURATION ===
 # Probability distribution for vehicle types (must sum to 1.0)
@@ -103,11 +92,19 @@ vehicle.probability.light=0.6
 vehicle.probability.heavy=0.2
 
 # Average crossing times (in seconds)
-vehicle.crossing.time.bike=1.5
+vehicle.crossing.time.bike=1.0
 vehicle.crossing.time.light=2.0
 vehicle.crossing.time.heavy=4.0
 
+# Travel times between intersections (in seconds)
+# Base time for light vehicles (cars)
+vehicle.travel.time.base=1.0
+# Bike travel time = 0.5 × car travel time
+vehicle.travel.time.bike.multiplier=0.5
+# Heavy vehicle travel time = 4.0 x base travel time
+vehicle.travel.time.heavy.multiplier=4.0
+
 # === STATISTICS ===
 
 # Interval between dashboard updates (seconds)
-statistics.update.interval=10.0
+statistics.update.interval=0.1

main/src/test/java/SimulationTest.java

@@ -1,125 +0,0 @@
-import java.io.IOException;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-import static org.junit.jupiter.api.Assertions.assertNotNull;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import org.junit.jupiter.api.Test;
-
-import sd.config.SimulationConfig;
-import sd.engine.SimulationEngine;
-import sd.model.Event;
-import sd.model.EventType;
-import sd.model.Intersection;
-import sd.model.TrafficLight;
-import sd.model.TrafficLightState;
-import sd.model.Vehicle;
-import sd.model.VehicleType;
-import sd.util.StatisticsCollector;
-import sd.util.VehicleGenerator;
-
-/**
- * Basic tests for the simulation components.
- */
-class SimulationTest {
-    
-    @Test
-    void testConfigurationLoading() throws IOException {
-        SimulationConfig config = new SimulationConfig("src/main/resources/simulation.properties");
-        
-        assertEquals(60.0, config.getSimulationDuration());
-        assertEquals("POISSON", config.getArrivalModel());
-        assertEquals(0.5, config.getArrivalRate());
-        assertEquals(10.0, config.getStatisticsUpdateInterval());
-    }
-    
-    @Test
-    void testVehicleGeneration() throws IOException {
-        SimulationConfig config = new SimulationConfig("src/main/resources/simulation.properties");
-        VehicleGenerator generator = new VehicleGenerator(config);
-        
-        Vehicle vehicle = generator.generateVehicle("TEST1", 0.0);
-        
-        assertNotNull(vehicle);
-        assertEquals("TEST1", vehicle.getId());
-        assertNotNull(vehicle.getType());
-        assertNotNull(vehicle.getRoute());
-        assertTrue(!vehicle.getRoute().isEmpty());
-    }
-    
-    @Test
-    void testEventOrdering() {
-        Event e1 = new Event(5.0, EventType.VEHICLE_ARRIVAL, null, "Cr1");
-        Event e2 = new Event(3.0, EventType.VEHICLE_ARRIVAL, null, "Cr2");
-        Event e3 = new Event(7.0, EventType.TRAFFIC_LIGHT_CHANGE, null, "Cr1");
-        
-        assertTrue(e2.compareTo(e1) < 0); // e2 should come before e1
-        assertTrue(e1.compareTo(e3) < 0); // e1 should come before e3
-    }
-    
-    @Test
-    void testIntersectionVehicleQueue() {
-        Intersection intersection = new Intersection("TestCr");
-        TrafficLight light = new TrafficLight("TestCr-N", "North", 30.0, 30.0);
-        
-        intersection.addTrafficLight(light);
-        
-        Vehicle v1 = new Vehicle("V1", VehicleType.LIGHT, 0.0, 
-            java.util.Arrays.asList("TestCr", "S"));
-        
-        intersection.configureRoute("S", "North");
-        
-        // Advance route to next destination
-        v1.advanceRoute();
-        
-        intersection.receiveVehicle(v1);
-        
-        assertEquals(1, intersection.getTotalQueueSize());
-        assertEquals(1, intersection.getTotalVehiclesReceived());
-    }
-    
-    @Test
-    void testTrafficLightStateChange() {
-        TrafficLight light = new TrafficLight("Test-Light", "North", 30.0, 30.0);
-        
-        assertEquals(TrafficLightState.RED, light.getState());
-        
-        light.changeState(TrafficLightState.GREEN);
-        assertEquals(TrafficLightState.GREEN, light.getState());
-        
-        light.changeState(TrafficLightState.RED);
-        assertEquals(TrafficLightState.RED, light.getState());
-    }
-    
-    @Test
-    void testSimulationEngineInitialization() throws IOException {
-        SimulationConfig config = new SimulationConfig("src/main/resources/simulation.properties");
-        SimulationEngine engine = new SimulationEngine(config);
-        
-        engine.initialize();
-        
-        assertNotNull(engine.getIntersections());
-        assertEquals(5, engine.getIntersections().size());
-        
-        // Check that intersections have traffic lights
-        for (Intersection intersection : engine.getIntersections().values()) {
-            assertEquals(3, intersection.getTrafficLights().size()); // North, South, East, West
-        }
-    }
-    
-    @Test
-    void testStatisticsCollector() throws IOException {
-        SimulationConfig config = new SimulationConfig("src/main/resources/simulation.properties");
-        StatisticsCollector collector = new StatisticsCollector(config);
-        
-        Vehicle v1 = new Vehicle("V1", VehicleType.LIGHT, 0.0, 
-            java.util.Arrays.asList("Cr1", "Cr2", "S"));
-        
-        collector.recordVehicleGeneration(v1, 0.0);
-        assertEquals(1, collector.getTotalVehiclesGenerated());
-        
-        collector.recordVehicleArrival(v1, "Cr1", 1.0);
-        
-        collector.recordVehicleExit(v1, 10.0);
-        assertEquals(1, collector.getTotalVehiclesCompleted());
-    }
-}

main/src/test/java/sd/serialization/SerializationTest.java

@@ -1,140 +0,0 @@
-package sd.serialization;
-
-import org.junit.jupiter.api.Test;
-import org.junit.jupiter.api.DisplayName;
-import sd.model.Message;
-import sd.model.Vehicle;
-import sd.model.VehicleType;
-
-import java.util.Arrays;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-/**
- * Test suite for JSON serialization.
- * 
- * Tests JSON serialization to ensure:
- * - Correct serialization and deserialization
- * - Data integrity during round-trip conversion
- * - Proper error handling
- */
-class SerializationTest {
-    
-    private MessageSerializer jsonSerializer = new JsonMessageSerializer();
-    
-    private Vehicle testVehicle = new Vehicle("V001", VehicleType.LIGHT, 10.5,
-            Arrays.asList("Cr1", "Cr2", "Cr5", "S"));
-    private Message testMessage = new Message(
-            sd.model.MessageType.VEHICLE_TRANSFER,
-            "Cr1",
-            "Cr2",
-            testVehicle
-    );
-    
-    
-    // ===== JSON Serialization Tests =====
-    
-    @Test
-    @DisplayName("JSON: Should serialize and deserialize Vehicle correctly")
-    void testJsonVehicleRoundTrip() throws SerializationException {
-        // Serialize
-        byte[] data = jsonSerializer.serialize(testVehicle);
-        assertNotNull(data);
-        assertTrue(data.length > 0);
-        
-        // Print JSON for inspection
-        System.out.println("JSON Vehicle:");
-        System.out.println(new String(data));
-        
-        // Deserialize
-        Vehicle deserialized = jsonSerializer.deserialize(data, Vehicle.class);
-        
-        // Verify
-        assertNotNull(deserialized);
-        assertEquals(testVehicle.getId(), deserialized.getId());
-        assertEquals(testVehicle.getType(), deserialized.getType());
-        assertEquals(testVehicle.getEntryTime(), deserialized.getEntryTime());
-        assertEquals(testVehicle.getRoute(), deserialized.getRoute());
-        assertEquals(testVehicle.getTotalWaitingTime(), deserialized.getTotalWaitingTime());
-        assertEquals(testVehicle.getTotalCrossingTime(), deserialized.getTotalCrossingTime());
-    }
-    
-    @Test
-    @DisplayName("JSON: Should serialize and deserialize Message correctly")
-    void testJsonMessageRoundTrip() throws SerializationException {
-        // Serialize
-        byte[] data = jsonSerializer.serialize(testMessage);
-        assertNotNull(data);
-        
-        // Print JSON for inspection
-        System.out.println("\nJSON Message:");
-        System.out.println(new String(data));
-        
-        // Deserialize
-        Message deserialized = jsonSerializer.deserialize(data, Message.class);
-        
-        // Verify
-        assertNotNull(deserialized);
-        assertEquals(testMessage.getType(), deserialized.getType());
-        assertEquals(testMessage.getSenderId(), deserialized.getSenderId());
-        assertEquals(testMessage.getDestinationId(), deserialized.getDestinationId());
-    }
-    
-    @Test
-    @DisplayName("JSON: Should throw exception on null object")
-    void testJsonSerializeNull() {
-        assertThrows(IllegalArgumentException.class, () -> {
-            jsonSerializer.serialize(null);
-        });
-    }
-    
-    @Test
-    @DisplayName("JSON: Should throw exception on null data")
-    void testJsonDeserializeNull() {
-        assertThrows(IllegalArgumentException.class, () -> {
-            jsonSerializer.deserialize(null, Vehicle.class);
-        });
-    }
-    
-    @Test
-    @DisplayName("JSON: Should throw exception on invalid JSON")
-    void testJsonDeserializeInvalid() {
-        byte[] invalidData = "{ invalid json }".getBytes();
-        assertThrows(SerializationException.class, () -> {
-            jsonSerializer.deserialize(invalidData, Vehicle.class);
-        });
-    }
-    
-    @Test
-    @DisplayName("JSON: Should preserve data integrity for complex objects")
-    void testDataIntegrity() throws SerializationException {
-        // Create a more complex vehicle
-        Vehicle vehicle = new Vehicle("V999", VehicleType.HEAVY, 100.5,
-            Arrays.asList("Cr1", "Cr2", "Cr3", "Cr4", "Cr5", "S"));
-        vehicle.addWaitingTime(10.5);
-        vehicle.addWaitingTime(5.3);
-        vehicle.addCrossingTime(2.1);
-        vehicle.advanceRoute();
-        vehicle.advanceRoute();
-        
-        // Serialize and deserialize
-        byte[] jsonData = jsonSerializer.serialize(vehicle);
-        Vehicle deserialized = jsonSerializer.deserialize(jsonData, Vehicle.class);
-        
-        // Verify all fields match
-        assertEquals(vehicle.getId(), deserialized.getId());
-        assertEquals(vehicle.getType(), deserialized.getType());
-        assertEquals(vehicle.getTotalWaitingTime(), deserialized.getTotalWaitingTime());
-        assertEquals(vehicle.getCurrentRouteIndex(), deserialized.getCurrentRouteIndex());
-    }
-    
-    // ===== Factory Tests =====
-    
-    @Test
-    @DisplayName("Factory: Should create JSON serializer by default")
-    void testFactoryDefault() {
-        MessageSerializer serializer = SerializerFactory.createDefault();
-        assertNotNull(serializer);
-        assertEquals("JSON (Gson)", serializer.getName());
-    }
-}