Shoulder Work Sign - W21-5-O
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Choose Your Reflectivity Grade
Compare visibility, durability, and ideal applications
Engineering Grade
Ideal Use
Parking lots
Brightness
General Lifespan
7 years
Night-time Visibility
500 feet away
High Intensity Prismatic
Ideal Use
Roadways
Brightness
General Lifespan
10 years
Night-time Visibility
1000 feet away
Diamond Grade
Ideal Use
High-speed roadways
Brightness
General Lifespan
10+ years
Night-time Visibility
1500 feet away
Product Details
Shoulder Work Sign - W21-5-O
Professional road safety signage demands precision and durability, and this Shoulder Work Sign (W21-5-O) delivers exceptional performance for construction and maintenance zones. Constructed from reflective aluminum standard punched blanks, the sign ensures maximum visibility and compliance with critical Department of Transportation and Manual on Uniform Traffic Control Devices (MUTCD) standards. Available in high intensity and diamond grade reflective options, this sign provides critical visual communication for motorists approaching shoulder work areas. The pre-punched holes facilitate straightforward installation, while the robust aluminum material guarantees long-term resilience against environmental conditions and potential roadside wear. Meeting both state and federal regulatory requirements, this sign represents a professional-grade solution for traffic management and worker safety.
Sign Specifications
MUTCD Code
W21-5-O
Sign Type
Construction Sign
Shape
Diamond
Standard warning sign shape
Colors
Orange background
Black legend
Compliance
MUTCD Compliant: This work zone warning sign meets federal standards per MUTCD Section 6F.16. Orange background indicates temporary traffic control.
| Size | Dimensions | Application |
|---|---|---|
| ConventionalDefault | 36×36" | Low-speed work zones |
| Freeway | 48×48" | High-speed work zones |
MUTCD Compliant
Federal standards
DOT Approved
State & Federal
ASTM D4956
Type III/IV/XI
10+ Years
Durability
Engineer Grade (EG)
Type: ASTM Type I
Lifespan: 5-7 years
Brightness: ~50 cd/lux/m²
Parking lots, low-speed areas, non-critical signage
High Intensity Prismatic (HIP)
Type: ASTM Type III/IV
Lifespan: 10 years
Brightness: ~360 cd/lux/m²
Traffic signs, work zones, roadways
Diamond Grade (DG3)
Type: ASTM Type XI
Lifespan: 10-12 years
Brightness: ~580 cd/lux/m²
Critical signs, freeways, overhead signs
Install in advance of work zone per MUTCD Chapter 6F. Orange background for temporary conditions. Remove or cover when work not in progress.
MUTCD Reference: Section 6F.16