MUTCD 11th Edition (2023)
Section 2A.05 — Shapes
Manual on Uniform Traffic Control Devices, Section 2A.05. Standards, guidance, options and support statements, with figures and cross-references.
Section 2A.05 Shapes Standard: 01 Particular shapes, as shown in Table 2A-1 , shall be used exclusively for specific signs or series of signs, unless otherwise provided in this Manual for a particular sign or class of signs. 02 The Crossbuck is a shape exclusive to the Grade Crossi ng (R15-1) sign and shall not be obscured by mounting a different shap e sign on the back of the Crossbuck (see Secti on 8B.03). Guidance: 03 Shapes that are exclusive to a particular sign (such as an octagon for STOP, a pennant for NO PASSING ZONE, or a circle for Railroad Advance) should not be obscured by…
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