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  2. Variations in traffic light operation - Wikipedia

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

    Flashing yellow arrow. [edit] Variations on the protected/permissive traffic signals in the United States; (1) is the "classic" doghouse five-light signal introduced in 1971; (2) and (3) incorporate flashing yellow arrows. In the US, a flashing yellow arrow is a signal phasing configuration for permissive left turns.

  3. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    Traffic lights normally consist of three signals, transmitting meaningful information to road users through colours and symbols, including arrows and bicycles. The regular traffic light colours are red, yellow (also known as amber), and green arranged vertically or horizontally in that order.

  4. Headlight flashing - Wikipedia

    en.wikipedia.org/wiki/Headlight_flashing

    Headlight flashing. Typical dashboard icon indicating that high beams are illuminated. Headlight flashing is the act of either briefly switching on the headlights of a car, or of momentarily switching between a headlight's high beams and low beams, in an effort to communicate with another driver or drivers.

  5. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Emergency vehicle lighting. Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized ...

  6. Rules for traffic lights - Wikipedia

    en.wikipedia.org/wiki/Rules_for_traffic_lights

    Rules for traffic lights. Traffic lights – devices positioned at road intersections, pedestrian crossings and other locations – control flows of traffic with social norms and laws created by the state. [1] Traffic signals have to convey messages to drivers in a short period of time about constantly-changing road rules.

  7. Traffic light control and coordination - Wikipedia

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

    Traffic light control and coordination. A junction for road vehicles and pedestrians controlled by traffic lights in the UK. The various vehicle and pedestrian movements are separated in either time or space for safety and efficiency. The normal function of traffic lights requires more than sight control and coordination to ensure that traffic ...

  8. Lane control lights - Wikipedia

    en.wikipedia.org/wiki/Lane_control_lights

    Lane control lights are a specific type of traffic light used to manage traffic on a multi-way road or highway. Typically they allow or forbid traffic to use one or more of the available lanes by the use of Green lights or arrows (to permit) or by red lights or crosses (to prohibit). When used, they are usually repeated at regular distances to ...

  9. Abcarian: Why we should care about Robert F. Kennedy Jr.'s ...

    www.aol.com/news/abcarian-why-care-robert-f...

    It ran full-steam across a freeway full of warning signs, flashing lights and oncoming traffic. Someone — forgive the reference to other strange RFK Jr. stories — is bound to end up as ...