Town of Cary
Home MenuRectangular Rapid Flashing Beacons (RRFB)
What Are They?
Rectangular Rapid Flashing Beacons (RRFBs) are traffic devices that use LED lights to emit rapid flashing (wig-wag) lights to drivers to alert them of the presence of pedestrians in the crosswalk. Originally tested and used in Florida, they were subsequently standardized for use nationwide.
How They Are Used?
It is important to know that RRFBs are not traffic control devices but are advanced warning devices that may help pedestrians alert motorists to their presence within the crosswalk. The lights are activated via a push button used by the pedestrians as they begin to cross the roadway. Pedestrians are expected to use caution when crossing and, at a minimum, wait until there is a sufficient gap in traffic before entering the crosswalk. The LED lights are timed to allow enough time for the pedestrians to completely cross the roadway. Drivers are expected to follow State law and yield to pedestrians in the crosswalk.
The RRFBs are active all day, allowing for activations during early morning and evening hours for individuals walking to and from work or school. The units are solar-powered, so they are not subject to power interruption during isolated power outages.
Safety Features of RRFBs at Mid-Block Pedestrian Crossings
Studies appear to indicate that RRFBs have been able to improve the rate at which drivers yield to pedestrians in the crosswalk and the Federal Highway Administration lists them as a proven safety countermeasure. Many RRFB crossings include a pedestrian and bicycle refuge in the median, like the Black Creek Greenway Trail crossing on NW Maynard Road. The refuge provides a large waiting area for trail users as well as handrails and access to the RRFB units. Providing this type of refuge may assist trail users by providing the option to cross one direction of travel on NW Maynard Rd at a time. RRFB units are also installed in the median, allowing users the option to activate the RRFB for each crossing independently.