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  2. Optical telegraph - Wikipedia

    en.wikipedia.org/wiki/Optical_telegraph

    The operators would move the semaphore arms to successive positions to spell out text messages in semaphore code, and the people in the next tower would read them. An optical telegraph is a line of stations, typically towers, for the purpose of conveying textual information by means of visual signals (a form of optical communication).

  3. Rules for traffic lights - Wikipedia

    en.wikipedia.org/wiki/Rules_for_traffic_lights

    Traffic light in Chelyabinsk, Russia showing a green light with a digital countdown (in the centre aspect) of the time left until the signal switches to amber. Red light running occurs when a motorist enters a junction any time after the signal light turns red unless a legal turn on red manoeuvre is completed. [3]

  4. Variations in traffic light operation - Wikipedia

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

    In New Zealand, where traffic is 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 a 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).

  5. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Signaling device to control competing flows of traffic This article is about lights used for signalling. For other uses, see Traffic light (disambiguation). "Stoplight" redirects here. For other uses, see Stoplight (disambiguation). An LED 50- watt traffic light in Portsmouth, United ...

  6. 'Turn off the lights!': Donald Trump leads unusual chant ...

    www.aol.com/article/2016/02/21/turn-off-the...

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  7. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    Typically, bulbs of 21 to 27 watts producing 280 to 570 lumens (22 to 45 mean spherical candlepower) are used for stop, turn, reversing and rear fog lights, while bulbs of 4 to 10 W, producing 40 to 130 lm (3 to 10 mscp) are used for tail lights, parking lights, side marker lights and side turn signal repeaters.

  8. Yellow trap - Wikipedia

    en.wikipedia.org/wiki/Yellow_trap

    The yellow trap occurs when the timing of the amber lights (also known as "yellow" lights in the USA) is asymmetric for two-way traffic on a single road: when a vehicle is waiting to turn across oncoming traffic and receives an amber light from the traffic signal, the driver may assume that oncoming traffic also has received an amber light and ...

  9. Turn the Lights Back On - Wikipedia

    en.wikipedia.org/wiki/Turn_the_Lights_Back_On

    "Turn the Lights Back On" is a single by American musician Billy Joel. It was released on February 1, 2024, through Columbia Records, and was Joel's first new single since "Christmas in Fallujah" was released in 2007. [2] The song was written by Joel, Freddy Wexler (who also produced the track), Arthur Bacon, and Wayne Hector. [3]