Do Not Pass on Shoulder - R4-18
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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
Do Not Pass on Shoulder - R4-18
Drivers need clear guidance to prevent dangerous roadside maneuvers, and this R4-18 sign provides critical safety information for highway and road management. The sign communicates an essential traffic regulation prohibiting vehicles from passing on road shoulders, which can prevent potentially catastrophic accidents. Constructed with reflective aluminum material and available in high intensity and diamond grade options, this sign meets DOT and MUTCD state and federal standards for visibility and compliance. The standard punched blanks ensure durability and legibility, allowing the sign to effectively communicate its warning message in various lighting conditions and weather environments.
Sign Specifications
MUTCD Code
R4-18
Sign Type
Regulatory Sign
Shape
Rectangle (Vertical)
Standard regulatory sign shape
Colors
White background
Black legend
Compliance
MUTCD Compliant: Movement regulation sign per MUTCD Section 2B.27.
| Size | Dimensions | Application |
|---|---|---|
| StandardDefault | 18×24" | 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 where the regulation applies.
MUTCD Reference: Section 2B.27