MUTCD 11th Edition (2023)
Section 2C.57 — Use of Supplemental Warning Plaques
Manual on Uniform Traffic Control Devices, Section 2C.57. Standards, guidance, options and support statements, with figures and cross-references.
Section 2C.57 Use of Supplemental Warning Plaques Option: 01 A supplemental warning plaque (see Figure 2C-16 ) may be displayed with a warning or regulatory sign when engineering judgment indicates that road users require additional warning information beyond that contained in the main message of the warning or regulatory sign. Standard: 02 Supplemental warning plaques shall be used only in combination with and installed on the same post(s) as warning or regulatory signs. They shall not be mounted alone or displayed alone. 03 Unless otherwise provided in this Manual for a particular plaque,…
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