MUTCD 11th Edition (2023)
Section 2D.20 — TRUCK Auxiliary Plaque (M4-4P)
Manual on Uniform Traffic Control Devices, Section 2D.20. Standards, guidance, options and support statements, with figures and cross-references.
Section 2D.20 TRUCK Auxiliary Plaque (M4-4P) Option: 01 The TRUCK (M4-4P) auxiliary plaque (see Figure 2D-5 ) may be used to designate an alternate route that branches from a numbered route, when it is desirable to encourage or require commercial vehicles to use the alternate route. Standard: 02 If used, the TRUCK auxiliary plaque shall be mounted directly above a route sign.
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