R1-1 Stop
Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
- Sign Name
- Stop
- General Meaning
- Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
- MUTCD Code
- R1-1
- Typical Use
- At the point where the regulation applies, per CA MUTCD Part 2B.
- Sign Category
- Regulatory Signs
Specifications
- Standard Shape
- Octagon
- Background Color
- Red
- Legend / Symbol
- White "STOP"
- Border
- White
- Reflectivity
- High Intensity (for nighttime visibility)
- Compliance
- MUTCD / CA MUTCD
Standard Sizes (inches)
- 18 in Octagon18" × 18"
- 24 in Octagon24" × 24"
- 30 in Octagon30" × 30"
- 36 in Octagon36" × 36"
- 48 in Octagon48" × 48"
Material / Application Notes
Typically used on the near side of intersections. May be used with supplemental plaques (e.g., “ALL WAY”) when required.
View this sign on the Federal MUTCD (FHWA)California Notes
California-specific application notes and adoptions may differ. Review California requirements where applicable.
What It Means / When This Sign Is Used
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.
Learn more about Stop sign requirementsWhen & Where It's Used
- Temporary intersection and access control
- Portable stop control at construction entrances
- Reinforcing right-of-way around a work area
Placement on a Traffic Control Plan
- Where it sits
- At the point where the regulation applies, per CA MUTCD Part 2B.
- CA MUTCD reference
- CA MUTCD Part 2B (Regulatory Signs)
- Typical minimum size
- 30" × 30" minimum; 36" × 36" on multilane or higher-speed roads
California / Field Use Notes
Used in California work zones as part of temporary intersection or access control, including portable STOP signs at temporary approaches.
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.
Common Plan Review Comments
- Temporary regulatory control not warranted or conflicts with existing control.
- Reduced speed limit posted without proper speed-setting authorization.
- Wrong-way protection (DO NOT ENTER / WRONG WAY) missing at closed approaches.
- Sign size not appropriate for the facility.
Confirm any temporary STOP control is warranted and does not conflict with existing control. Public Ready reviews temporary right-of-way changes.
Related Signs
View All R-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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