Prohibits a right turn at the intersection or location where the sign is posted, making it a traffic law violation to turn right.
MUTCD-style sign reference illustration. Always verify against the official CA MUTCD and Caltrans sign charts.
| Sign code | R3-1 |
|---|---|
| Federal code | R3-1 |
| Name | No Right Turn |
| Category | Regulatory Signs |
| Shape | Rectangle (Vertical) |
| Color | White background, black legend, red circle and slash |
| California status | Used in California per CA MUTCD |
| Typical CA minimum size | Per CA MUTCD minimum for the roadway type |
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.
Prohibits a right turn at the intersection or location where the sign is posted, making it a traffic law violation to turn right.
Prohibits a right turn at the intersection or location where the sign is posted, making it a traffic law violation to turn right. In the field, R3-1 No Right Turn is typically positioned at the advance warning area, ahead of the work. Common deployments include prohibiting right turns at intersections affected by lane closures; controlling turning movements at construction-zone approaches; temporary turn restrictions due to pavement work on receiving roads. 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 where a right turn must be prohibited due to lane realignment, construction activity, or closure of the receiving road.
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: Per CA MUTCD minimum for the roadway type.
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: Advance warning area, ahead of the work.
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 the turn prohibition is properly authorized and does not conflict with existing control. Public Ready reviews temporary turn restriction signing.
These signs are typically deployed alongside R3-1 on a California TCP.
Need to prohibit a right turn at a work-zone approach? Public Ready can supply NO RIGHT TURN (R3-1) signs.
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 R3-1 No Right Turn, visit WorkZoneCompliance.com.
Public Ready can help with R3-1 No Right Turn — 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.
