MUTCD 11th Edition (2023)
Section 8D.09 — Preemption of Highway Traffic Signals at or Near Grade Crossings
Manual on Uniform Traffic Control Devices, Section 8D.09. Standards, guidance, options and support statements, with figures and cross-references.
Section 8D.09 Preemption of Highway Traffic Signals at or Near Grade Crossings Support: 01 Traffic signal preemption for grade crossings is a complex topic that requires a specific understanding of grade crossing warning systems and highway traffic signal operations. While most traffic signal operations are governed only by the traffic signal controller unit and the associated traffic signal equipment, preemption for grade crossings is also governed by the grade crossing warning system. Active grade crossing warning systems include flashing-light signals and possibly automatic gates, as well…
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