所设计的交通信号灯控制电路，主要适用于在两条干道汇合点形成的十字交叉路口，路口设计两组红绿灯分别对两个方向上的交通运行状态进行管理。当B方向的红灯亮时，A方向对应绿灯亮,Designed traffic signal control circuit, mainly apply to the formation of the converging point of two roads cross the intersection, the design of two sets of traffic