Design & Construction Standards

Traffic and Safety Resources

Rectangular Rapid-Flashing Beacon (RRFB)

An RRFB is an enhanced pedestrian device that uses rapidly flashing yellow lights to warn drivers that a pedestrian is in the crosswalk. The flashing lights are turned on by a push-button that pedestrians can press when they are ready to cross. These enhanced pedestrian devices are typically placed at marked crosswalks where there are no signals or stop signs to control traffic. They may be placed in locations with high pedestrian traffic (like schools and college campuses) or locations where drivers are less likely to yield to pedestrians (like multi-lane roundabouts).

How do they work?

For Pedestrians: Press the button on the signpost and the yellow lights will start flashing. Stay alert and do your best to ensure drivers are yielding before you start to cross.

RRFBs also have features to help those with disabilities, including blind individuals and those with limited vision. The chirping sounds you hear as you approach help people find the button on the signpost. After the button is pressed, you will hear a voice say, “Yellow lights are flashing.” On the curb ramp, the bumps on the yellow panel provide a tactile indication that you are entering the roadway. All these features make crosswalks more accessible to everyone in our communities.

For Drivers: You are required by law to yield to pedestrians in crosswalks, regardless of whether an RRFB is present or whether a pedestrian has activated the flashing lights. The flashing lights are an extra feature intended to draw your attention to the pedestrian in the crosswalk. When you see them flash, slow down or stop to allow the pedestrian to cross. Keep in mind you may be stopping for someone with limited or no vision.

Additional resources

• Rectangular Rapid Flashing Beacons (RRFB) – Federal Highway Administration
• Evaluation of Rectangular Rapid-Flashing Beacons (RRFB) at Multilane Roundabouts
• What is an Accessible Pedestrian Signal (APS)?