Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
MUTCD-style sign reference illustration. Always verify against the official CA MUTCD and Caltrans sign charts.
| Sign code | R1-1 |
|---|---|
| Federal code | R1-1 |
| Name | Stop |
| Category | Regulatory Signs |
| Shape | Octagon |
| Color | Red background, white legend and border |
| California status | Used in California per CA MUTCD |
| Typical CA minimum size | 30" × 30" minimum; 36" × 36" on multilane or higher-speed roads |
Download this sign or open the official MUTCD reference.
Official source: FHWA Standard Highway Signs, 2024 (11th Edition) — Regulatory signs.
Source: FHWA Standard Highway Signs — Public Domain. California: CA MUTCD 2026 (effective Jan 18, 2026).
Files linked from FHWA are official government publications in the public domain. CA MUTCD and Caltrans links open official government websites. Always verify against the current edition.
Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe. In the field, R1-1 Stop is typically positioned at the point of regulation within the activity area. Common deployments include temporary intersection and access control; portable stop control at construction entrances; reinforcing right-of-way around a work area. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
Used in California work zones as part of temporary intersection or access control, including portable STOP signs at temporary approaches.
Common field deployments
Agency review note
StreetsLA, LA County DPW, and Caltrans District 7 may require larger sizes or additional devices. Verify with the reviewing agency before finalizing the TCP.
Typical minimum: 30" × 30" minimum; 36" × 36" on multilane or higher-speed roads.
Sizes are CA MUTCD minimums and vary by roadway classification and speed. Verify against the CA MUTCD 2026 (CA MUTCD Part 2B (Regulatory Signs)), Caltrans sign specifications, and the reviewing agency.
Where it sits: Point of regulation within the activity area.
CA MUTCD reference: CA MUTCD Part 2B (Regulatory Signs).
In Los Angeles, temporary regulatory changes (speed, one-way, turn or entry restrictions) generally involve LADOT review, and on state highways Caltrans District 7. Regulatory authority cannot be created by signing alone — confirm the change is authorized by the agency with jurisdiction over the roadway.
Confirm any temporary STOP control is warranted and does not conflict with existing control. Public Ready reviews temporary right-of-way changes.
These signs are typically deployed alongside R1-1 on a California TCP.
Need temporary STOP (R1-1) signs for access control? Public Ready can supply them on portable stands.
Free official resource — opens official government website
Free official resource — opens official government website
Free official resource — opens official government website
Free official resource — opens official government website
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.
To understand the bigger picture around permits, agency review, lane closures, and pedestrian access for work zones using R1-1 Stop, visit WorkZoneCompliance.com.
Public Ready can help with R1-1 Stop — including sign rental or purchase, California-compliant signs and traffic control plan support, and agency-review support for Caltrans District 7, the City of Los Angeles, and LA County.
