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
Interstate Business Spur 3 - M1-3W
Navigate with confidence using this high-quality Interstate Business Spur sign designed for clear roadway communication. Constructed with premium materials, this sign meets rigorous Department of Transportation (DOT) and Manual on Uniform Traffic Control Devices (MUTCD) standards for state and federal compliance. Featuring 3/8 inch prepunched holes and radius corners, the sign is engineered for easy installation and durability. Available in high intensity and diamond grade reflective surfaces, this M1-3 sign provides excellent visibility for 3-digit interstate business spur designations, ensuring drivers can quickly and accurately identify route information.
Sign Specifications
MUTCD Code
M1-3W
Sign Type
Route Marker
Shape
Rectangle (Vertical)
Standard regulatory sign shape
Colors
White background
Black legend
Compliance
MUTCD Compliant: Route marker per Section 2D.11. Standard shield design for route identification.
| Size | Dimensions | Application |
|---|---|---|
| StandardDefault | 24x24" | Business routes |
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 on sign assembly with route number. Interstate: blue shield. US Route: white shield. State: varies.
MUTCD Reference: Section 2D.11
Often Paired With
Signs commonly installed together per MUTCD guidelines
