Fix Intersection Destination - Doubled Advance

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

@@ -114,8 +114,8 @@ public class Intersection {
     public void receiveVehicle(Vehicle vehicle) {
         totalVehiclesReceived++;
 
-        // Advance route since vehicle just arrived at this intersection
+        // Note: Route advancement is handled by SimulationEngine.handleVehicleArrival()
-        vehicle.advanceRoute();
+        // before calling this method, so we don't advance here.
         
         String nextDestination = vehicle.getCurrentDestination();