有一个实际的十字路口设置有东西、南北两个方向的干道,为确保车辆安全通行,在每条干道的每个入口设置了一组两位数码管显示装置和四组红、绿、黄信号灯,分别用来指示东西方向直行、南北方向直行、东西方向转弯和南北方向转弯；同时设有紧急处理状态，数码管显示可有人工控制，并设有初始化功能。-There is a real crossroads to set something, the north-south trunk road in both directions, to ensure the safe passage of vehicles at every entrance of each trunk group set up two digital display devices and four sets of red, green and yellow lights were used to indicate the direction of things straight, straight north-south direction, the direction of the turn and the north-south direction things turn　also features a state of emergency treatment, digital display can have manual control, and has initialization function.