十字路口交通灯控制系统设计

89S52 is adopted as the core control system of the system of traffic light in crossroad. The model uses the monolithic as the main control unit, which manage the vehicles and passers-by with four indicator lights: left signal, right signal, straight-forward signal and the pedestrian signals, the countdown time will be also shown in every way. This model finds the solution to solve the problem when vehicles’ turning left and special vehicle coming across the crossroad. Every direction has four signs including left, right, straight forward and pedestrians. And the time will be given in two nixie tube to transform the surplus time.