The FHWA has officially terminated the Interim Approval for Rectangular Rapid Flashing Beacons (RRFBs). The installation of any new replacement RRFB’s by any highway agency, including those agencies who received the FHWA’s approval to use RRFBs under Interim Approval 11, is prohibited. However, any existing RRFB that was installed prior to December 21, 2017 that complies with the terms of Interim Approval 11 may remain in place until it reaches the end of its useful service of life. More information can be found here: Rectangular Flashing Pedestrian Beacons Prohibited Use.
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