FHWA has issued a Termination Memorandum for the above traffic control device. Please note that after December 21, 2017 the installation of any new or replacement rectangular rapid flashing beacons (RRFB) by any highway agency, including those agencies who received the FHWA's approval to use rectangular rapid flashing beacons under Interim Approval 11, shall be prohibited. However, any existing rectangular rapid flashing beacon (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 life.
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