交通灯控制器 在十字路口的两个方向上各设一组红绿黄等，显示顺序为：其中一个方向是绿灯，黄灯，红灯，另一个方向是红灯，绿灯，黄灯。-Traffic signal controller at the crossroads of two directions, each with a set of red, green and yellow, shows the following order: one direction is green, yellow, red, and the other