This guide summarizes the MUTCD requirements and practical application guidance for the R1-7a WAIT ON STOP - GO ON SLOW sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.
Flagger stations on one-lane, two-way control
Advance warning area, ahead of the work.
Mount at the standard height and setback for the roadway with clear sight lines.
High reflectivity and clear sight lines are essential day and night.
Instructs road users at a flagger station to wait when the flagger displays STOP and proceed slowly when the flagger displays SLOW.
Instructs road users at a flagger station to wait when the flagger displays STOP and proceed slowly when the flagger displays SLOW. In the field, R1-7a Wait on Stop - Go on Slow is typically positioned at the advance warning area, ahead of the work. Common deployments include flagger stations on one-lane, two-way control; used with the STOP/SLOW paddle (W20-8) and Flagger (W20-7); alternating one-way flagging operations. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
Advance warning area, ahead of the work.
Typical minimum: 24" × 30".
Posted at a California flagger station to reinforce how drivers must respond to the STOP/SLOW paddle, used with the flagger operation in a one-lane, two-way TTC setup.
Go to California NotesEducational 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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