MUTCD R3-4 · Regulatory signs
No U-turn
What it means
No U-turn
What to do about it
U-turns are prohibited at this location. (MUTCD R3-4, Section 2B.26.)
Practice this on the real test format
Signs are the part of the DMV written test people fail on, because reading them is a skill rather than a fact to memorize. Aprobify drills all 1034 of them, and tells you why each answer is what it is.
Get the appSign designations follow the MUTCD and the California MUTCD published by Caltrans; meanings are checked against the California Driver's Handbook (DL 600, rev. 6/2025). Edited by Fernando Aguilera. Aprobify is not affiliated with the California DMV.
Signs in the same family
These sit next to it in the regulatory signs series — the ones most easily mixed up with it.
- R3-1g Right turns are prohibited during the times and days posted on the sign
- R3-1h Right turns are prohibited during several posted time periods
- R3-2 No left turn
- R3-3 No turns — you must continue straight through
- R3-5a Traffic in this lane must proceed straight through the intersection
- R3-5bP Plaque identifying that the lane control sign above applies to the left lane
