根据城市的十字路口各部门和在不同时间的交通流量，智能交通灯控制方案，并给出基于VHDL语言，采用层次结构设计的QuartusⅡ模拟思想。-According to the different branches of city’s intersections and the traffic flow at different times, the program of intelligent traffic light controller based on VHDL is given and simulated by QuartusⅡ by using hierarchical design thought.