MUTCD 11th Edition (2023)
Section 2C.25 — Low Clearance Signs (W12-2, W12-2a, and W12-2b)
Manual on Uniform Traffic Control Devices, Section 2C.25. Standards, guidance, options and support statements, with figures and cross-references.
Section 2C.25 Low Clearance Signs (W12-2, W12-2a, and W12-2b) Standard: 01 The Low Clearance Advance (W12-2) sign (see Figure 2C-6 ) shall be used to warn road users of vertical clearances less than 14 feet 6 inches, or vertical clearances less than 12 inches above the statutory maximum vehicle height, whichever is greater. Guidance: 02 The actual clearance should be displayed on the Low Clearance (W12-2, W12-2a, and W12-2b) sign to the nearest 1 inch not exceeding the actual clearance. However, in areas that experience changes in temperature causing frost action, a reduction, not exceeding 3…
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