This guide summarizes the MUTCD requirements and practical application guidance for the R3-2 NO LEFT TURN sign. Use this resource to understand when it is required, how to place it correctly, and how to maintain clear visibility for safe operations.
Prohibiting left turns at intersections affected by median or lane work
At the point where the regulation applies, per CA MUTCD Part 2B.
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.
Prohibits a left turn at the intersection or location where the sign is posted, making it a traffic law violation to turn left.
Prohibits a left turn at the intersection or location where the sign is posted, making it a traffic law violation to turn left. In the field, R3-2 No Left Turn is typically positioned at the advance warning area, ahead of the work. Common deployments include prohibiting left turns at intersections affected by median or lane work; controlling turning movements at construction-zone approaches; temporary turn restrictions where the receiving lane is closed. Always confirm its size, retroreflective sheeting, spacing, and placement against the CA MUTCD 2026 and the reviewing agency before finalizing the traffic control plan.
At the point where the regulation applies, per CA MUTCD Part 2B.
Typical minimum: Per CA MUTCD minimum for the roadway type.
Used in California work zones where a left turn must be prohibited due to lane realignment, median work, or closure of a receiving lane.
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.
Public Ready supports sign selection, project-ready sign packages, and equipment sourcing through qualified providers — with expert support built for compliance.
