Advisory Speed Curve Sign - W13-5
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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
Advisory Speed Curve Sign - W13-5
This advisory speed curve sign is a critical traffic safety component designed to help drivers navigate challenging road geometries with enhanced awareness. Constructed on standard aluminum blanks, the sign provides clear guidance about recommended speeds for upcoming sharp curves, helping prevent potential accidents. Manufactured to meet DOT and MUTCD state and federal standards, the W13-5 sign is available in high-intensity and diamond-grade reflective materials. Its superior visibility ensures that drivers receive important speed recommendations both during daylight hours and in low-light conditions, effectively reducing risks on winding rural and mountain roadways.
Sign Specifications
MUTCD Code
W13-5
Sign Type
Warning Sign
Shape
Diamond
Standard warning sign shape
Colors
Yellow background
Black legend
Compliance
MUTCD Compliant: This advisory speed sign meets federal standards per MUTCD Section 2C.08. Used to indicate recommended safe speed for conditions.
| 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
Mount directly below primary warning sign. Advisory speed must be multiple of 5 mph, determined by engineering study.
MUTCD Reference: Section 2C.08
Often Paired With
Signs commonly installed together per MUTCD guidelines
