通过用80C51芯片写入程序，实现十字路*通灯通行功能，模拟路口处得红绿灯状态转换，达到保持车辆顺畅通行无阻，禁止路口处车辆阻塞，疏导交通的目的。-Written procedure by using 80C51 chip, to achieve common feature crossroads traffic lights, traffic lights simulated intersection was the state transition, to maintain the smo