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  2. Traffic warning sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_warning_sign

    Vienna Convention traffic signal ahead (white triangle) These warning signs indicate that traffic lights are ahead, and are often used when it is difficult to see that a traffic light may already be showing red, to warn a driver to prepare to slow down. They may be supplemented with flashing light or lighted sign when light is red or turning red.

  3. Tell-tale (automotive) - Wikipedia

    en.wikipedia.org/wiki/Tell-tale_(automotive)

    A group of tell-tales showing lights for "brake fluid", "stop lamp" and "check engine" Graphical tell-talesA tell-tale, sometimes called an idiot light [1] or warning light, is an indicator of malfunction or operation of a system, indicated by a binary (on/off) illuminated light, symbol or text legend.

  4. Trafficators - Wikipedia

    en.wikipedia.org/wiki/Trafficators

    The shape differs in that the trafficator has only the lower 'blade' of the rail signal's terminal 'arrowhead', so that the retracted trafficator sits flush with the vehicle's exterior. They were common on vehicles until the introduction of the flashing amber, red or white indicators at or near the corners of the vehicle (and often along the ...

  5. Electric vehicle warning sounds - Wikipedia

    en.wikipedia.org/.../Electric_vehicle_warning_sounds

    As a result of increased sales of full electric vehicle and hybrid electric vehicles in several countries, some members of the blind community have raised concerns about the noise reduction when those vehicles operate in all-electric mode, as blind people or the visually impaired consider the noise of combustion engines a helpful aid while crossing streets and think quiet hybrids could pose an ...

  6. Mercedes adds a new car light color: Blue for self-driving

    www.aol.com/mercedes-adds-car-light-color...

    There’s white for headlights and reverse lights, red for brake lights and rear lights plus, in some cars, amber for turn signals. Mercedes-Benz has just gotten approval to add a fourth color.

  7. 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 ...

  8. Colors of noise - Wikipedia

    en.wikipedia.org/wiki/Colors_of_noise

    [16] [17] That is, it is similar to pink noise, but with different spectral content and different relationships (i.e. 1/f for pink noise, while 1/f 2 for red noise, or a decrease of 6.02 dB per octave). In areas where terminology is used loosely, "red noise" may refer to any system where power density decreases with increasing frequency. [18]

  9. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    Without an all-red phase, cross-turning traffic may be caught in a yellow trap. When the signal turns yellow, a turning driver may assume oncoming traffic will stop and a crash may result. For this reason, the US bans sequences that may cause a yellow trap. [30] This can also happen when emergency vehicles or railroads preempt normal signal ...

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