Road traffic signal is divided into: command signal, roadway light signal, crosswalk signal lamp, traffic signal bar,traffic warning light gesture command signal. Introduction as follows,Command signal lights is bright, the vehicles and pedestrians are allowed to pass, but turning vehicles are not allowed to interfere with the straight line of the vehicle and was released in the pedestrian traffic; when the yellow light,solar led traffic sign，vehicles are not allowed, pedestrians, but has crossed the stop line of vehicles and has entered the pedestrian crossing pedestrians can continue to pass.
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