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  2. Variations in traffic light operation - Wikipedia

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

    A pole-mounted four-light signal with flashing yellow arrow for a left turn in Oregon. In the US, Canada, Brazil, Australia and The Netherlands, flashing yellow does not require traffic to stop, but drivers should exercise caution since opposing traffic may enter the intersection after stopping. This may be used when there is a malfunction with ...

  3. 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 ...

  4. Automotive lighting - Wikipedia

    en.wikipedia.org/wiki/Automotive_lighting

    The modern flashing turn signal was patented in 1938, [56] and shortly after, most major automobile manufacturers offered this optional feature before it became mandatory in 1967. [53] As of 2013, most countries require turn signals on all new vehicles that are driven on public roadways.

  5. Rules for traffic lights - Wikipedia

    en.wikipedia.org/wiki/Rules_for_traffic_lights

    A flashing amber traffic light usually indicates you have a yield or stop sign as a redundant sign, while a turned-off traffic light usually indicates you have the right-of-way. In the UK and parts of North America, drivers simply treat the junction as being uncontrolled when traffic lights fail, giving way as appropriate, unless a police ...

  6. 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 ...

  7. Traffic light control and coordination - Wikipedia

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

    This three-arm signal controlled junction has three vehicle phases (A, B and C) and a pedestrian phase (D). The phases operate together in three stages (1, 2 and 3). Moving phases are shown in green and stopped phases are shown in red. Phases are indications shown to traffic on traffic signal aspects (a single light on a signal head). For ...

  8. Signal lights - Wikipedia

    en.wikipedia.org/wiki/Signal_lights

    Signal lights may refer to: Traffic light, signal lights controlling automotive & pedestrian traffic flow; Turn signals, signal lights indicating automotive change of direction; Railway signalling, use of signal lights to control train traffic flow; Signal lamp, a device for communicating between ships with flashing lights.

  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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