MUTCD 11th Edition (2023)
Section 4F.19 — Preemption Control of Traffic Control Signals
Manual on Uniform Traffic Control Devices, Section 4F.19. Standards, guidance, options and support statements, with figures and cross-references.
Section 4F.19 Preemption Control of Traffic Control Signals Support: 01 Preemption control (see definition in Section 1C.02) is typically given to trains, boats, emergency vehicles, and light rail transit. 02 Examples of preemption control include the following: A. The prompt displaying of green signal indications at signalized locations ahead of fire vehicles, law enforcement vehicles, ambulances, and other official emergency vehicles; B. A special sequence of signal phases and timing to expedite and/or provide additional clearance time for vehicles to clear the tracks prior to the arrival…
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