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2. Variations in traffic light operation - Wikipedia

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

   In some parts of the US, a few traffic lights have slowly flashing white strobe lights superimposed on the center of the red light, which are activated when the red light itself is illuminated. These are common on highways with few traffic signals; in high-traffic, and high-speed areas (where drivers running red lights are a major problem); in ...

3. Traffic signal preemption - Wikipedia

   en.wikipedia.org/wiki/Traffic_signal_preemption

   Traffic signal preemption (also called traffic signal prioritisation) is a system that allows an operator to override the normal operation of traffic lights.The most common use of these systems manipulates traffic signals in the path of an emergency vehicle, halting conflicting traffic and allowing the emergency vehicle right-of-way, thereby reducing response times and enhancing traffic safety.

4. Traffic light - Wikipedia

   en.wikipedia.org/wiki/Traffic_light

   This is an accepted version of this page This is the latest accepted revision, reviewed on 19 February 2025. Signaling device to control competing flows of traffic This article is about lights used for signalling. For other uses, see Traffic light (disambiguation). "Stoplight" redirects here. For other uses, see Stoplight (disambiguation). An LED 50- watt traffic light in Portsmouth, United ...

5. Emergency vehicle lighting - Wikipedia

   en.wikipedia.org/wiki/Emergency_vehicle_lighting

   A hide-away strobe light fitted into a headlamp. The strobe light is the coiled glass tube in the bottom of the headlight assembly, near the center of the highlighted region of the picture (click picture to enlarge). The vehicle's stock lighting may also be modified to add flashing and strobe effects.

6. Mobile infrared transmitter - Wikipedia

   en.wikipedia.org/wiki/Mobile_Infrared_Transmitter

   The timer causes the infrared LEDs to strobe at specific frequencies, such as 10Hz for low priority (buses) or 14 Hz for high priority (emergency vehicles). [citation needed] Low priority transmitters will control the intersection to perform a normal light change, while high priority transmitters will change an entire intersection immediately.

7. Strobe light - Wikipedia

   en.wikipedia.org/wiki/Strobe_light

   Strobe light flash rates should not exceed 4 flashes per second; when multiple strobe lights are used, flashes should be synchronized. Warnings should be posted at venue entryways, e.g., “WARNING: Strobe lights are used during this performance”. Staff, crew, audiences and viewers should be informed prior to any usage of flickering lights or ...