MUTCD 11th Edition (2023)
Section 6H.22 — Shoulder Work Signs (W21-5, W21-5a, and W21-5b)
Manual on Uniform Traffic Control Devices, Section 6H.22. Standards, guidance, options and support statements, with figures and cross-references.
Section 6H.22 Shoulder Work Signs (W21-5, W21-5a, and W21-5b) Support: 01 Shoulder Work signs (see Figure 6H-1) warn of maintenance, reconstruction, or utility operations on the highway shoulder where the roadway is unobstructed.Standard: 02 The Shoulder Work sign shall have the legend SHOULDER WORK (W21-5), RIGHT (LEFT) SHOULDER CLOSED (W21-5a), or RIGHT (LEFT) SHOULDER CLOSED XX FT or AHEAD (W21-5b).Option: 03 The Shoulder Work sign may be used in advance of the point on a non-limited access highway where there is shoulder work. It may be used singly or in combination with a ROAD WORK NEXT…
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