MUTCD 11th Edition (2023)
Section 4U.01 — Application of In-Roadway Warning Lights
Manual on Uniform Traffic Control Devices, Section 4U.01. Standards, guidance, options and support statements, with figures and cross-references.
Section 4U.01 Application of In-Roadway Warning Lights Support: 01 In-Roadway Warning Lights are special types of highway traffic signals installed in the roadway surface to warn road users that they are approaching a condition on or adjacent to the roadway that might not be readily apparent and might require the road users to reduce their speed and/or come to a stop. This includes situations warning of marked school crosswalks, marked midblock crosswalks, marked crosswalks on uncontrolled approaches, marked crosswalks in advance of roundabouts as described in Chapter 3D, and other roadway…
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