Traffic → OpenDrive 关系

文件在 Unreal/CarlaUE4/Plugins/Carla/Source/Carla/Traffic	在 Unreal/CarlaUE4/Plugins/Carla/Source/Carla/OpenDrive 中引用
SignComponent.h	Unreal/CarlaUE4/Plugins/Carla/Source/Carla/OpenDrive/OpenDrive.h
TrafficLightManager.h	Unreal/CarlaUE4/Plugins/Carla/Source/Carla/OpenDrive/OpenDrive.h