MUTCD R3-18 · Regulatory signs
No U-turn and no left turn
What it means
No U-turn and no left turn
What to do about it
This is the combination No U or Left Turn sign, used where both movements are prohibited instead of posting separate R3-2 and R3-4 signs. (MUTCD R3-18, 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.
- R3-9e A reversible lane, whose direction of travel changes by time of day
- R3-9f Post-mounted version of the reversible lane control sign
- R3-9g The point ahead where a reversible lane changes direction
- R3-9i End of the reversible lane section
- R3-19 This median lane is for left turns only
- R3-19a Start of a median lane reserved for U-turns
