RAMP NARROWS Sign Requirements

1. When a RAMP NARROWS Sign Is Used

Warns that the width of a ramp is reduced ahead, so drivers approach the narrowed section with caution.

• Ramp work that reduces available width
• Shoulder or barrier work on a ramp
• Used with channelizing devices along the narrowed section

2. How and Where It Applies

Warns that the width of a ramp is reduced ahead, so drivers approach the narrowed section with caution. In the field, W5-4 Ramp Narrows is typically positioned at the advance warning area, ahead of the work. Common deployments include ramp work that reduces available width; shoulder or barrier work on a ramp; used with channelizing devices along the narrowed section. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.

3. Placement and Application Notes

Advance warning area, ahead of the work.

• Place the sign where drivers have a clear, unobstructed view on approach.
• Mount at the standard height and setback from the edge of the traveled way.
• Do not mount with other signs on the same post unless space constraints require it.

4. Standard Sizes and Visibility Considerations

Typical minimum: 48" × 48" on conventional roads; 60" × 60" on expressways and freeways.

• Choose size based on roadway speed, sight distance, and mounting location.
• Maintain high retroreflectivity for maximum night and adverse-weather visibility.

5. California Notes

Used where work activity narrows a ramp in a California work zone, alerting drivers before the reduced-width section.

6. Common Field or Planning Mistakes

• Sign not shown at the correct advance distance for the posted speed.
• Advance warning sign missing or out of sequence on the TCP.
• Wrong size specified for the roadway classification (conventional vs. expressway).
• Sign sheeting / retroreflectivity class not noted on the plan.