R1-1 Stop Sign
Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
| 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 |
What This Sign Means
Requires every driver to come to a complete stop at the marked stop line, crosswalk, or intersection before proceeding when it is safe.
California Temporary Traffic Control Use
Used in California work zones as part of temporary intersection or access control, including portable STOP signs at temporary approaches.
Common TCP Context
- Temporary intersection and access control
- Portable stop control at construction entrances
- Reinforcing right-of-way around a work area
California Size Requirements
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.
Common Placement on a TCP
Where it sits: Point of regulation within the activity area.
CA MUTCD reference: CA MUTCD Part 2B (Regulatory Signs).
Los Angeles Area Usage Notes
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.
Plan Review Notes
Confirm any temporary STOP control is warranted and does not conflict with existing control. Public Ready reviews temporary right-of-way changes.
Signs Commonly Used Together
These signs are typically deployed alongside R1-1 on a California TCP.
Rent or Purchase This Sign
Need temporary STOP (R1-1) signs for access control? Public Ready can supply them on portable stands.
Official References
- California MUTCD (Caltrans)
Free official resource — opens official government website
- Federal MUTCD (FHWA)
Free official resource — opens official government website
- Caltrans Sign Charts
Free official resource — opens official government website
- FHWA Standard Highway Signs
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.
Related Signs
Need signs for a California project?
Need to rent, purchase, or include traffic control signs on a California project? Public Ready can help with sign rental, purchase, sign packages, TCP sign legends, and permit coordination.