绿灯对于生活在城市里的人来说是非常熟悉的交通信号。出门上街你不论是步行、骑自行车或是驾车，平交路口的红绿灯会不间断地发出信号，确保你和他人的安全，保证道路交通畅通有序。可时下我们常看到红绿灯亮起并不能起到约束车辆和行人的作用，当然，违章者绝非没有分辨能 The green light is a very familiar traffic signal for people living in the city. Going to the street Whether you are walking, cycling or driving, the traffic light at the level crossing will signal continuously to ensure the safety of you and others and to ensure smooth and orderly road traffic. Nowadays, we often see the traffic lights lit up and can not play a role in restraining vehicles and pedestrians. Of course, there is absolutely no resolution