MUTCD 11th Edition (2023)
Section 4D.06 — Visibility, Aiming, and Shielding of Signal Faces
Manual on Uniform Traffic Control Devices, Section 4D.06. Standards, guidance, options and support statements, with figures and cross-references.
Section 4D.06 Visibility, Aiming, and Shielding of Signal Faces Guidance: 01 The visibility of signal indications to approaching traffic should be the highest priority for signal face placement and aiming. 02 Road users approaching a signalized intersection or other signalized area, such as a midblock crosswalk, should be given a clear and unmistakable indication of whether they are being directed to stop or permitted to proceed. 03 The geometry of each intersection to be signalized, including vertical grades, horizontal curves, and obstructions as well as the lateral and vertical angles of…
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