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  2. File:Traffic lights red-yellow.svg - Wikipedia

    en.wikipedia.org/wiki/File:Traffic_lights_red...

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  3. Acme Corporation - Wikipedia

    en.wikipedia.org/wiki/Acme_Corporation

    At the time the Acme Traffic Signal Company produced the traffic lights in Los Angeles, the city where Warner Bros. was making its cartoons. Instead of today's amber/yellow traffic light, bells rang as the small red and green lights with "Stop" and "Go" semaphore arms changed — a process that took five seconds. [7]

  4. File:West-side-highway traffic.png - Wikipedia

    en.wikipedia.org/wiki/File:West-side-highway...

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  5. Xiaolüren - Wikipedia

    en.wikipedia.org/wiki/Xiaolüren

    Xiaolüren, a sign on traffic signals for pedestrians, was created in 1961 by traffic psychologist Karl Peglau (1927–2009) as part of a proposal for a new traffic lights layout in East Berlin, Germany. The sign is generally for pedestrian road-crossings. The frontal-facing red man denotes "stop", while the animated side-facing green man in ...

  6. Stop sign - Wikipedia

    en.wikipedia.org/wiki/Stop_sign

    Red traffic lights signify stop, so the new specification unified red as a stop signal whether given by a sign or a light. The current mounting height of 7 ft (2.13 m) was first specified in 1971. The current mounting height of 7 ft (2.13 m) was first specified in 1971.

  7. Ampelmännchen - Wikipedia

    en.wikipedia.org/wiki/Ampelmännchen

    The first traffic lights at pedestrian crossings were erected in the 1950s, and many countries developed different designs (which were eventually standardised). [3] At that time, traffic lights were the same for cars, bicycles and pedestrians. [4] The East Berlin Ampelmännchen was created in 1961 by traffic psychologist Karl Peglau (1927 ...

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  9. Variations in traffic light operation - Wikipedia

    en.wikipedia.org/wiki/Variations_in_traffic...

    In New Zealand, where they drive on the left, when a road is given a green light from an all direction stop, a red arrow can continue to display to turning traffic, holding traffic back while the pedestrian crossing on the side road is given a green signal (for left turns) or while oncoming traffic goes straight ahead and there is no permissive right turn allowed (for right turns).