Signal Ahead (symbol) Sign - W3-3
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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
Signal Ahead (symbol) Sign - W3-3
Navigate roadways with confidence using this critical traffic warning sign designed to alert drivers to upcoming traffic signals. Engineered with high-visibility reflective surfaces on durable aluminum blanks, this W3-3 standard sign meets all DOT and MUTCD regulatory requirements for traffic safety signage. The reflective aluminum construction ensures maximum visibility during both daytime and nighttime driving conditions, helping motorists anticipate and prepare for upcoming traffic signals well in advance. By providing clear, standardized visual communication, this sign plays a crucial role in reducing potential traffic conflicts and enhancing overall road safety.
Sign Specifications
MUTCD Code
W3-3
Sign Type
Warning Sign
Shape
Diamond
Standard warning sign shape
Colors
Yellow background
Black legend
Compliance
MUTCD Compliant: This advance traffic control warning sign meets federal standards per MUTCD Section 2C.36. Used to warn of upcoming traffic control devices.
| Size | Dimensions | Application |
|---|---|---|
| StandardDefault | 30x30" | 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 traffic control device when visibility is limited. Placement distance per MUTCD Table 2C-4 based on approach speed.
MUTCD Reference: Section 2C.36
Often Paired With
Signs commonly installed together per MUTCD guidelines
