// Use this for initialization
 void Start()
 {
     InvokeRepeating("SpawnTruck", 5f, 4f);
     CarEventManager.StartListening("ExitIntersection", HandleExitIntersection);
 }
 // Use this for initialization
 void Start()
 {
     CarEventManager.StartListening("EnterIntersection", HandleEnterIntersection);
     CarEventManager.StartListening("ExitIntersection", HandleExitIntersection);
 }