Are the traffic lights at the intersection of Gong Yizhi and Tian Kangzhi useful?

Traffic lights (traffic lights) generally refer to traffic lights. A traffic signal lamp is a signal lamp that directs traffic operation, generally consisting of a red light, a green light and a yellow light. Red light means no traffic, green light means permission, and yellow light means warning.

Traffic lights are divided into: motor vehicle lights, non-motor vehicle lights, crosswalk lights, direction indicator lights (arrow lights), lane lights, flashing warning lights, and road and railway intersection lights.