% Grade Sign - W7-3
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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
% Grade Sign - W7-3
This W7-3 % Grade Sign provides critical roadway safety information by alerting drivers to significant elevation changes ahead. Constructed from durable aluminum with high-intensity reflective coating, the sign ensures maximum visibility during both day and night driving conditions. Meeting all DOT and MUTCD state and federal standards, this sign helps prevent potential vehicle control issues on steep grades by giving drivers advance warning of road slope percentages. The standard punched blank design and reflective surface make it an essential traffic communication tool for highways, mountain roads, and areas with significant terrain variations.
Sign Specifications
MUTCD Code
W7-3
Sign Type
Warning Sign
Shape
Diamond
Standard warning sign shape
Colors
Yellow background
Black legend
Compliance
MUTCD Compliant: This hill warning sign meets federal standards per MUTCD Section 2C.26. Used to warn of steep grades ahead.
| Size | Dimensions | Application |
|---|---|---|
| Conventional RoadDefault | 30×30" | Two-lane roads, residential areas |
| Multi-Lane | 36×36" | Multi-lane roads, higher speed limits |
| Expressway | 48×48" | Expressways, freeways, high-speed roads |
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 at top of grade for downhill warning, or in advance for uphill notification. Required when grade exceeds: 5% for 3000ft, 6% for 2000ft, 7% for 1000ft, 8% for 750ft, 9% for 500ft.
MUTCD Reference: Section 2C.26
Often Paired With
Signs commonly installed together per MUTCD guidelines
