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  2. Greenlight - Wikipedia

    en.wikipedia.org/wiki/Greenlight

    The power to greenlight a project is generally reserved to those in a project or financial management role within an organization. The process of taking a project from pitch to green light formed the basis of a successful reality TV show titled Project Greenlight. [4] The term is a reference to the green traffic signal, indicating "go ahead".

  3. Green Light - Wikipedia

    en.wikipedia.org/wiki/Green_Light

    Green Light (missile), a precursor to the Sea Cat surface-to-air missile; Green light (UFO), a type of unidentified flying object; Green light, a manager giving a player permission to be aggressive; See Glossary of baseball (G) Green light, the "Go" indication on a traffic light; Green light, to order someone's assassination

  4. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Most ambulances use red or red and white light combinations. However, ambulances operated by the National Police and the Army are equipped with red and blue lights. Some ambulances can be seen with green lights, meaning they were imported from Argentina where ambulances always use green lights.

  5. Exit sign - Wikipedia

    en.wikipedia.org/wiki/Exit_sign

    European sign directive 92/58/EEC of 24 June 1992 indicates that the signs should be green in color to indicate a safe place of exit. BS EN 1838:1999 and BS 5266-7:1999 also govern emergency lighting applications. In the United States, exit signs can be red or green, but traditionally they have been red.

  6. Variations in traffic light operation - Wikipedia

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

    Traffic lights in Greece, Italy and Sweden used to show a green and yellow light together, to indicate that the light was about to change to red. [34] All countries now officially use a single yellow light instead, as displaying both the yellow and the green lights is in violation of the Vienna Convention on Road Signs and Signals.

  7. Navigation light - Wikipedia

    en.wikipedia.org/wiki/Navigation_light

    Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...

  8. Green Light Teams - Wikipedia

    en.wikipedia.org/wiki/Green_Light_Teams

    Green Light Teams were teams of American special forces personnel created during the height of the Cold War. [1] The teams, also known to as Atomic Demolition Munitions Specialists , were trained to advance, arm, and deploy Special Atomic Demolition Munitions (SADM) behind enemy lines. [ 2 ]

  9. History of traffic lights - Wikipedia

    en.wikipedia.org/wiki/History_of_traffic_lights

    The signal was 22 feet (6.7 m) high. The light was called the semaphore and had arms that would extend horizontally that commanded drivers to "Stop" and then the arms would lower to a 45 degrees angle to tell drivers to proceed with "Caution". [3] At night a red light would command "Stop" and a green light would mean use "Caution". [3]