Regulatory signs
No U-Turn sign
U-turns are not allowed here.
What it looks like
White square sign with a black U-shaped arrow inside a red circle with a red slash.
- Type
- Regulatory
- Federal design code
- MUTCD R3-4
From real handbooks
How permit tests ask about it
28 of our verified questions in 28 states show this sign. A few of them, each from a different handbook where we can:
1.What does this sign mean?
- ADo not enter
- BNo left turn
- CNo U-turn
- DWrong way
Show the answer
✓ C. No U-turn
This regulatory sign means you may not make a U-turn here.
2.What does this sign mean?
- ASharp curve ahead
- BU-turns are allowed here
- CU-turns are not allowed
- DRoad ahead is closed
Show the answer
✓ C. U-turns are not allowed
Prohibition signs show the forbidden action inside a red circle with a slash; this one forbids U-turns.
Source: 2025-2027 Noncommercial Driver License Manual, Class D (2025-2027), page 14
3.What does this sign mean?
- AU-turns are allowed here
- BThe road ends ahead
- CU-turns are not allowed here
- DTurn around if you missed your exit
Show the answer
✓ C. U-turns are not allowed here
Prohibited signs show something you cannot do, such as no U-turn or no left turn.
Source: Colorado Driver Handbook (DR 2337) (DR 2337), page 11