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29/11/1910 Traffic signal

3:52

History of The Traffic Light

2:21

How do Traffic Lights Work?

43:57

The Traffic Documentary - Geographic History

Traffic lights, also known as traffic signals, traffic lamps, traffic semaphore, signal lights, stop lights, robots, and traffic control signals, are signaling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic.
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    • Traffic light