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Signal Light

Traffic lights, also known as traffic signals, traffic lamps, signal lights, stop lights and robots, and also known technically as traffic control signals are signalling devices positioned at road intersections, pedestrian crossings and other locations to control competing flows of traffic. ... Traffic lights alternate the right of way accorded to road users by displaying lights of a standard color (red, orange, and green) following a universal color code. [Traffic light. Wikipedia]
Signal Light
Signal Light, signal light, lights, traffic light,