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  2. Twilight Sentinel - Wikipedia

    en.wikipedia.org/wiki/Twilight_Sentinel

    Automatic activation: In twilight or low-light conditions, the system automatically turns on the vehicle's exterior lights. [5] 3. Automatic deactivation: When sufficient ambient light is detected, the system turns off the exterior lights. [3] 4. Manual override: The system can be turned off or bypassed by manually operating the headlights. [6]

  3. Exit sign - Wikipedia

    en.wikipedia.org/wiki/Exit_sign

    Fluorescent lamps are used in the same way as incandescent bulbs, back-lighting both sides of an exit fixture from within. LED signs combine a large number of bright light-emitting diodes to illuminate the sign from inside. An exit sign is constantly lit; fluorescent bulbs need to be changed more often than LEDs, although the absence of ...

  4. Daytime running lamp - Wikipedia

    en.wikipedia.org/wiki/Daytime_running_lamp

    Full-voltage vs. parking light headlamp on European-market Volkswagen, 2007. Depending on prevailing regulations and equipment, vehicles may implement the daytime-running light function by functionally turning on specific lamps, by operating low-beam headlamps or fog lamps at full or reduced intensity, by operating high-beam headlamps at reduced intensity, or by steady-burning operation of the ...

  5. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    The American auto industry voluntarily adopted amber front turn signals for most vehicles beginning in the 1963 model year, [67] [68] though the advent of amber signals was accompanied by legal stumbles in some states [69] [70] and front turn signals were still legally permitted to emit white light until FMVSS 108 took effect for the 1968 model ...

  6. Variable-message sign - Wikipedia

    en.wikipedia.org/wiki/Variable-message_sign

    Since the late 1990s, the most common technology used in new installations for variable message signs are LED displays. In recent years, some newer LED variable message signs have the ability to display colored text and graphics. Dot-matrix variable message signs are divided into three subgroups: character matrix, row matrix, and full matrix.

  7. Traffic light control and coordination - Wikipedia

    en.wikipedia.org/wiki/Traffic_light_control_and...

    But the recent introduction of the flashing yellow arrow (see article Traffic-light signalling and operation) makes the lead-lag signal, an aid to progression, available with protected/permissive turns. [15] [16] In modern coordinated signal systems, it is possible for drivers to travel long distances without encountering a red light.

  8. Emergency light - Wikipedia

    en.wikipedia.org/wiki/Emergency_light

    An emergency light is a battery-backed lighting device that switches on automatically when a building experiences a power outage. In the United States, emergency lights are standard in new commercial and high occupancy residential buildings, such as college dormitories , apartments , and hotels .

  9. Lane control lights - Wikipedia

    en.wikipedia.org/wiki/Lane_control_lights

    Lane control signals around the world follow their own universal pattern, as specified in the Vienna Convention on Road Signs and Signals. [1]: Art.23, ¶11 Typical signals include a green downward arrow, used to indicate a lane which is open to traffic facing the signal, a red cross, which indicates a lane is either reserved for opposing traffic or closed to traffic in both directions, and a ...

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