No U-Turn Sign — Meaning

By DMV Master Editorial Team Updated April 28, 2026 Also: NO U-TURN

Category: Regulatory
Shape: Vertical Rectangle
Colors: Black, Red, White
Text: (symbol)
MUTCD Code: R3-4

What does the No U-Turn Sign mean?

The No U-Turn sign shows a black U-turn arrow inside a red circle with a red diagonal slash. It prohibits drivers from making a 180-degree U-turn at the marked location. U-turns are commonly restricted at busy intersections to prevent collisions.

What to do when you see this sign

1
Do not make a U-turn at the marked location or intersection
2
Continue past the sign and find a legal turnaround (driveway, side street, or designated U-turn area)
3
Use a 3-point turn or block-around route if no legal U-turn is available
4
Watch for additional restrictions like "No U-Turn 7 AM – 9 PM" plates

Where you'll see it

At busy urban intersections
On divided highways
In school zones during arrival/dismissal hours
Where U-turns would create a sight-line hazard

Test trap: don't get caught by this

A No U-Turn sign does not prohibit left turns or right turns — only the 180-degree reversal. Watch carefully; many drivers misread it and avoid all turns at the intersection.

Frequently asked questions

Where am I allowed to make a U-turn if a No U-Turn sign is posted?

Continue to the next intersection or designated U-turn area where U-turns are permitted. Many highways have signs indicating "Authorized U-Turn" locations.

Are U-turns illegal everywhere they are not signed?

No — U-turns are generally legal unless a sign prohibits them, you are in a no-pass zone, or visibility is restricted (less than 200 feet of clear road).

What is the difference between No U-Turn and No Left Turn?

No U-Turn prohibits 180-degree reversals only. No Left Turn prohibits 90-degree left turns. Both signs may appear at the same intersection.