270 Degree Curve Sign - W1-15
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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
270 Degree Curve Sign - W1-15
Highway safety demands clear, precise communication, and the 270 Degree Curve Sign (W1-15) delivers critical information to drivers navigating challenging road geometries. Constructed on standard aluminum punched blanks with high-visibility reflective material, this sign ensures maximum legibility in diverse lighting and weather conditions. Available in high intensity and diamond grade options, the sign meets all DOT and MUTCD state and federal standards for regulatory compliance. The reflective surface provides exceptional visibility, alerting drivers to significant roadway curvature and helping prevent potential accidents by giving advance warning of challenging driving conditions.
Sign Specifications & Compliance
MUTCD Code
W1-15
Sign Type
Warning Sign
Shape
Diamond
Standard warning sign shape
Colors
Yellow background
Black legend
Compliance
MUTCD Compliant: This sign meets federal standards for horizontal alignment warning signs per MUTCD Section 2C.06. Required where roadway curves exceed 270 degrees.
| 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 on the right side of the roadway in advance of the curve. Placement distance depends on posted speed: 100ft (25 mph), 175ft (35 mph), 250ft (45 mph), 350ft (55 mph). Often paired with an Advisory Speed Plaque (W13-1P) showing recommended curve speed. For severe curves, consider additional Chevron Alignment signs (W1-8) through the curve.
MUTCD Reference: Section 2C.06
Often Paired With
Signs commonly installed together per MUTCD guidelines
