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RRFB: RECTANGULAR RAPID FLASH BEACON

K&K Systems’ Rectangular Rapid Flash Beacon (RRFB) is a device using LED flashing beacons in combination with

pedestrian warning signs, to provide a high-visibility strobe-like warning to drivers when pedestrians use a crosswalk. In general, RRFBs are a visual cue that pedestrians may begin crossing the roadway at any time. They are always accompanied by crosswalk markings and signs.


Crosswalk RRFBs operate by wireless PUSH BUTTON activation. When a pedestrian pushes the button to cross the street, the sign is activated and begins to flash to warn drivers of the crossing pedestrians. The flashing pattern can be activated with push buttons or automated (e.g., video or infrared) pedestrian detection.

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