No Thru Traffic Sign - W9-4A
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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 Thru Traffic Sign - W9-4A
Designed to manage traffic flow and protect private spaces, this W9-4A sign effectively communicates vehicle restrictions in residential areas, parking lots, and private roads. The clear messaging helps prevent unauthorized through traffic while enhancing overall safety for residents and pedestrians. Constructed from reflective aluminum, the sign meets DOT and MUTCD standards, ensuring durability and high visibility in diverse outdoor conditions. The professional-grade materials and precise W9-4A coding guarantee compliance with state and federal traffic regulation requirements.
Sign Specifications
MUTCD Code
W9-4A
Sign Type
Warning Sign
Shape
Diamond
Standard warning sign shape
Colors
Yellow background
Black legend
Compliance
MUTCD Compliant: This lane transition warning sign meets federal standards per MUTCD Section 2C.38. Used to warn of lane closures or transitions.
| 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 in advance of lane closure or transition. Placement distance per MUTCD Table 2C-4.
MUTCD Reference: Section 2C.38
Often Paired With
Signs commonly installed together per MUTCD guidelines
