MUTCD 11th Edition (2023)
Section 2C.58 — Design of Supplemental Warning Plaques
Manual on Uniform Traffic Control Devices, Section 2C.58. Standards, guidance, options and support statements, with figures and cross-references.
Section 2C.58 Design of Supplemental Warning Plaques Standard: 01 A supplemental warning plaque used with a warning sign shall have the same legend, border, and background color as the warning sign with which it is displayed. A supplemental warning plaque used with a regulatory sign shall have a black legend and border on a yellow background. 02 Supplemental warning plaques shall be square or rectangular. Figure 2C-16. Supplemental Warning Plaques Note: The background color (yellow or fluorescent yellow-green) shall match the color of the warning sign that it supplements.W16-10P W16-15P…
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