Road Machinery (distance) Sign - W21-3
Secure checkout • 100% satisfaction guaranteed
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
Road Machinery (distance) Sign - W21-3
Road construction zones demand clear, precise communication to protect workers and motorists. This Road Machinery (Distance) Sign provides essential advance warning for drivers approaching active work areas, helping prevent potential accidents and ensuring smoother traffic flow. Constructed from durable aluminum with standard punched blanks, the sign meets all DOT and MUTCD state and federal standards. Available in high intensity and diamond grade reflective options, the sign offers enhanced visibility in low-light conditions, allowing drivers to anticipate and respond to upcoming road machinery and potential hazards well in advance.
Sign Specifications
MUTCD Code
W21-3
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 |
|---|---|---|
| Minimum | 30x30" | Low-volume roads |
| StandardDefault | 36x36" | Conventional roads |
| Expressway | 48x48" | Expressways and freeways |
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
Often Paired With
Signs commonly installed together per MUTCD guidelines
