No U-turn sign
A U-shaped arrow inside a red circle with a slash. U-turns are prohibited there.
Rules vary by state and country. This explains the sign's standard meaning in the U.S. Manual on Uniform Traffic Control Devices; it isn't legal advice.
How to read it
The red circle and slash mean the movement pictured inside is not allowed, as California's and Florida's handbooks describe it. The MUTCD places at least one sign where a No Left Turn sign would go. Where both left turns and U-turns are banned, a combined No U-Turn/No Left Turn sign (R3-18) can be used instead.
At roundabouts
The MUTCD does not allow No U-Turn signs on the approaches to a roundabout to prohibit turning left onto the circle.
More road signs
Sources
- MUTCD 2009 Edition, Chapter 2B: Regulatory Signs, Barricades, and Gates, MUTCD 2009, Part 2, U.S. Federal Highway Administration, Section 2B.18
- Pennsylvania Driver's Manual, Chapter 2: Signals, Signs and Pavement Markings, Pennsylvania Department of Transportation, p. 11
- California Driver's Handbook, Section 7: Laws and Rules of the Road, California Department of Motor Vehicles, Signs
- Official Florida Driver License Handbook, rev. 08/2023, Florida Department of Highway Safety and Motor Vehicles, p. 49
Last reviewed September 25, 2026 by Rory Hansen. How we research