MUTCD 11th Edition (2023)
Section 4L.02 — Design of Rectangular Rapid Flashing Beacons
Manual on Uniform Traffic Control Devices, Section 4L.02. Standards, guidance, options and support statements, with figures and cross-references.
Section 4L.02 Design of Rectangular Rapid Flashing Beacons Standard: 01 Each RRFB unit shall consist of two rapidly-flashed rectangular-shaped yellow indications, each with an LED-array based pulsing light source. The size of each RRFB indication shall be at least 5 inches wide by at least 2 inches high. 02 The two RRFB indications for each RRFB unit shall be aligned horizontally, with the longer dimension horizontal and with a minimum space between the two indications of at least 7 inches, measured from nearest edge of one indication to the nearest edge of the other indication. The outside…
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