交通信号是指挥车辆、行人通行、停止或转弯的信息标志。交通信号又分为指挥灯信号、车道灯信号、人行横道信号、交通指挥棒信号和手势信号。指挥灯信号的红灯,是停止信号;绿灯,是通行信号,这是全世界的统一规定。我国的交通信号灯,除了国际上通用的红、绿灯外,在红、绿灯之间,还有一盏黄灯,按红黄绿的顺序,由左向右或从上到下排列。手势信号,即用手势指 Traffic signals are information signs that direct vehicles, pedestrians, stops or turns. Traffic signal is divided into the command light signal, lane lights signal, pedestrian crossing signals, traffic baton signals and gesture signals. The red light of the signal light is the stop signal; the green light is the signal of passage, which is the uniform regulation of the whole world. In addition to the common red and green lights in the world, there is a yellow light in our country’s traffic lights, ranging from red, yellow and green, from left to right or from top to bottom. Gesture signal, that is, using gestures