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W9-2a Merge Here Take Turns — official FHWA layout

MERGE HERE TAKE TURNS Sign Requirements

This guide summarizes the MUTCD requirements and practical application guidance for the W9-2a MERGE HERE TAKE TURNS sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.

When It Is Used

Late-merge (zipper) lane-closure operations

Where It Applies

Advance warning area, ahead of the work.

Placement Basics

Mount at the standard height and setback for the roadway with clear sight lines.

Visibility / Reflectivity

High reflectivity and clear sight lines are essential day and night.

1. When a MERGE HERE TAKE TURNS Sign Is Used

Supports a zipper (late) merge by telling drivers to merge at the closure point and take turns, keeping both lanes in use until the merge point.

  • Late-merge (zipper) lane-closure operations
  • Higher-volume approaches with recurring queues
  • Used with W20-5 series lane-closed signing

2. How and Where It Applies

In the field, W9-2a Merge Here Take Turns is typically positioned at the advance warning area, ahead of the work. Common deployments include late-merge (zipper) lane-closure operations; higher-volume approaches with recurring queues; used with W20-5 series lane-closed signing. 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

Position W9-2a 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 with the lane-closure sequence in California work zones where a late-merge (zipper) operation is called for to manage queues on higher-volume approaches.

Go to California Notes

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.

Related Resources

View All W-Series Signs

Educational reference only. This is not an official Caltrans, FHWA, or local agency publication and is not legal or engineering advice. Always verify sign selection, size, placement, spacing, and application against the current CA MUTCD 2026, Caltrans sign specifications, Standard Plans, project documents, and the reviewing agency’s requirements. Local jurisdictions may impose additional requirements, and final selection, placement, and dimensions may require engineering judgment or agency approval. Written against California MUTCD 2026 (effective January 18, 2026) and the Federal MUTCD 11th Edition. Official sources last verified June 2026.

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