No U-Turn or Left Turn Sign - R3-18
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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
No U-Turn or Left Turn Sign - R3-18
Safeguard roadways and prevent dangerous traffic maneuvers with this professionally engineered R3-18 No U-Turn or Left Turn Sign. Constructed from durable aluminum with advanced reflective properties, the sign provides clear visual communication of traffic restrictions in all lighting conditions. Designed to meet DOT and MUTCD state and federal standards, this sign is available in high intensity and diamond grade reflective options. The standard punched blank ensures precise mounting and long-lasting performance, making it an essential component of comprehensive traffic safety infrastructure.
Sign Specifications
MUTCD Code
R3-18
Sign Type
Regulatory Sign
Shape
Rectangle (Vertical)
Standard regulatory sign shape
Colors
White background
Black legend
Compliance
MUTCD Compliant: Turn/lane control sign per MUTCD Section 2B.18.
| Size | Dimensions | Application |
|---|---|---|
| StandardDefault | 18x24" | Conventional |
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 or near the intersection where the restriction applies.
MUTCD Reference: Section 2B.18
Often Paired With
Signs commonly installed together per MUTCD guidelines
