中文说明：用matlab模拟出十字路口的车辆通行情况。车流量可以自己设置，并且绘出了图象能直观地模拟出十字路口的通行状况
English Description：
Use matlab to simulate the traffic situation of the intersection. The traffic flow can be set by oneself, and the picture can be drawn, which can directly simulate the traffic condition of the intersection