Shoulder Work Ahead Signs
The purpose of Shoulder Work Ahead Signs (MUTCD W21-5) is to inform drivers that maintenance or construction activities are taking place on the road's shoulder. What is the shoulder of the road? The shoulder of the road is a paved or unpaved strip of land adjacent to the roadway, providing a safe area for emergency stops, breakdowns, or for use by pedestrians and cyclists when necessary.
MUTCD W21-5 Guidance
Shoulder Work Ahead Sign Details:
- Sign is manufactured on durable rust-proof .080" aluminum
- Pre-punched 3/8" mounting holes in top and bottom for easy installation.
- Meets M.U.T.C.D. specifications for highway use.
In Stock - Usually ships same or next business day.
High Intensity Prismatic Reflective on .080" Aluminum:
MATERIAL | SIZE | PRICE PER SIGN | ADD TO CART | Catalog Part # | ||
---|---|---|---|---|---|---|
1 to 2 | 3 to 5 | 6 + | ||||
![]() High Intensity Prismatic | 30" x 30" | $95.37 | $85.83 | $81.06 | W21-5-AHD-3030-HIP | |
36" x 36" | $145.97 | $131.37 | $124.07 | W21-5-AHD-3636-HIP | ||
48" x 48" | $226.93 | $204.24 | $192.89 | W21-5-AHD-4848-HIP |
Fluorescent Orange Prismatic Reflective on .080" Aluminum:
MATERIAL | SIZE | PRICE PER SIGN | ADD TO CART | Catalog Part # | ||
---|---|---|---|---|---|---|
1 to 2 | 3 to 5 | 6 + | ||||
![]() Fluorescent Orange Prismatic | 30" x 30" | $111.87 | $100.68 | $95.09 | W21-5-AHD-3030-FLO | |
36" x 36" | $154.77 | $139.29 | $131.55 | W21-5-AHD-3636-FLO | ||
48" x 48" | $245.19 | $220.67 | $208.41 | W21-5-AHD-4848-FLO |
Available Reflective Finishes:
High Intensity Prismatic Reflective | Fluorescent Orange Prismatic Reflective |
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Sign Posts
Sign Installation Hardware
Other Work Zone Signs
Specifications:
Legend: | SHOULDER WORK AHEAD |
MUTCD Sign Code #: | W21-5-AHD |
Shape: | Diamond |
Color: | BLACK on ORANGE |
Available Sizes and Weights: | Size: 30" x 30"; Ship Weight: 7.8 lbs |
Size: 36" x 36"; Ship Weight: 11.2 lbs | |
Size: 48" x 48"; Ship Weight: 19.9 lbs | |
Available Styles: | High Intensity Prismatic Reflective on .080" Aluminum |
Fluorescent Orange Prismatic Reflective on .080" Aluminum | |
Full Description: | W21-5-AHD have a orange background color. The text and border are black and it is in the shape of a diamond. |
Mounting Hole Placement: | ![]() |
Example Use:
On Interstate I-70, as drivers cruise at highway speeds, they encounter a bright orange 'Shoulder Work Ahead' sign positioned prominently on the right-hand side of the road. This sign alerts them that upcoming maintenance or construction activities are taking place on the shoulder. The warning gives drivers an opportunity to be extra cautious, watch out for workers, equipment, or any obstructions, and potentially merge left if necessary.