History of traffic lights

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Traffic lights are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic. The history of traffic lights is associated with the historic growth of the automobile. Traffic lights were first introduced in December 1868 in London to assist police officers controlling traffic. Since then, electricity and computerised control has advanced traffic light technology and increased intersection capacity.

Read on Wikipedia · Image New York World-Telegram and the Sun staff photographer: Twachtman, Phyllis, photographer., Public domain