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  3. Runaway Truck Ramp (exit) Sign - W7-4B
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Sign Specifications

MUTCD Code

W7-4B

Sign Type

Warning Sign

Shape

Diamond

Standard warning sign shape

Colors

ABC

Yellow background

Black legend

Compliance

MUTCD Compliant: This hill warning sign meets federal standards per MUTCD Section 2C.26. Used to warn of steep grades ahead.

SizeDimensionsApplication
Conventional RoadDefault30×30"Two-lane roads, residential areas
Multi-Lane36×36"Multi-lane roads, higher speed limits
Expressway48×48"Expressways, freeways, high-speed roads
Compliance & Certifications

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

Recommended

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 top of grade for downhill warning, or in advance for uphill notification. Required when grade exceeds: 5% for 3000ft, 6% for 2000ft, 7% for 1000ft, 8% for 750ft, 9% for 500ft.

MUTCD Reference: Section 2C.26

Reference: MUTCD Section 2C.26

Often Paired With

Signs commonly installed together per MUTCD guidelines

Right Turn Arrow Sign - W1-1R

W1-1R

Right Turn Arrow Sign

Road Work (distance) Sign - W20-1

W20-1

Road Work (distance) Sign

Pedestrian Crossing Sign - W11-2

W11-2

Pedestrian Crossing Sign

Road Closed (distance) Sign - W20-3

W20-3

Road Closed (distance) Sign

Stop Ahead (Symbol) Sign - W3-1

W3-1

Stop Ahead (Symbol) Sign

Workers Ahead Sign - W21-1

W21-1

Workers Ahead Sign

View All Warning Signs

Runaway Truck Ramp (exit) Sign - W7-4B

Runaway Truck Ramp (exit) Sign - W7-4B
Min: 1 • Max: 1000
Unit Price:$0.00
Quantity:× 1
Total:$0.00

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Product Details

Runaway Truck Ramp (exit) Sign - W7-4B

Critical safety signage for mountainous highways and steep grade roadways, this Runaway Truck Ramp Sign (W7-4B) provides essential visual communication for commercial vehicle operators. Manufactured from durable aluminum with standard punched blanks, the sign delivers advanced warning of emergency escape routes designed to prevent catastrophic brake failures. Constructed with high-visibility reflective materials, the sign meets all DOT and MUTCD regulatory standards for traffic control devices. Its robust design ensures legibility in challenging environmental conditions, allowing truck drivers to identify potential emergency ramp locations well in advance of reaching a critical descent point. The pre-drilled mounting holes facilitate straightforward installation on roadside infrastructure.

Spec • 2026
MUTCD Compliant