试题再现:红绿灯的时间分配主要根据路口交通流量的大小、车道行车的比例、车行的路面状况等决定。人流量很大的地方,红绿灯时间设置还要充分考虑到车让人。读某城区四个人行路口,甲、乙、丙、丁东西方向的红绿灯时间长度统计表(表1)。据此回答1~2题。 Item Reproduction: The time allocation of traffic lights is mainly determined by the traffic volume at intersections, the proportion of lane traffic, the road conditions of the dealership, and so on. Large flow of people, traffic lights set time but also give full consideration to make people. Reading a city of four people at the junction, A, B, C, Dingdong direction of the traffic light time length statistics (Table 1). Answer 1 to 2 questions accordingly.