交通灯控制器在A、B方向各有红、黄、绿三盏灯，其控制顺序按表的设计进行循环，表中1表示灯亮、0表示灯灭。交通灯控制器按照主干道数码管显示50S，支干道数码管显示30S, 主干道变为红灯，支干道变为绿灯，继续进行倒计时；支干道倒计时结束后再经行5秒倒计时，交通灯变为黄灯；支干道倒计时结束后再回到初始状态。-Traffic light controller in A, B direction of each red, yellow, and green light, the control sequence of the design cycle according to the table, the table 1 that light, 0 is lights out. Main road traffic light controller in accordance with digital display 50S, branch roads digital display 30S, the main road into the red, branch roads into the green light to continue the countdown　branch roads countdown after the end of the line five seconds after the countdown, traffic lights becomes yellow　branch roads after the end of the countdown to the initial state.