Featuring a curved black arrow reversing direction overlaid with a bold diagonal red stripe inside a red ring, this sign prohibits U-turns.
It is installed at high-risk locations such as busy signalised junctions, dual carriageway gaps, and narrow urban streets where turn manoeuvres create severe collision hazards.
What this sign means
It prohibits drivers from performing a U-turn to head back in the direction from which they came.
The prohibition applies to all motor vehicles and pedal cycles at the junction or section of road where placed.
- Curved U-arrow with a red prohibition bar across it.
- Bans turning around on carriageways or at traffic signals.
- Used where reverse-direction turns risk broadside collisions.
What to do when you see it
If you missed a turning or need to reverse your route, continue straight ahead or turn off safely into a side street.
Find a safe roundabout, side road, or designated turning place further along your route to alter direction safely.
How this sign is tested
Theory test questions regularly feature junction diagrams asking whether a U-turn is permitted when this sign is visible.
You may also be tested on alternative safe routing methods when direct U-turns are prohibited.
Common mistakes
Drivers sometimes believe a U-turn is allowed if traffic lights are green or no opposing traffic is visible.
Learners occasionally confuse 'No U-turn' with 'No Right Turn', though the curved arrow clearly distinguishes the former.
Test yourself on this one
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Practise road sign questionsFrequently asked questions
Can I do a 3-point turn instead of a U-turn where this sign is shown?
No, performing a turn in the road to reverse direction in a prohibited zone is illegal.
Where are No U-turn signs most commonly placed?
They are usually installed at busy traffic lights, dual carriageway crossovers, and near pedestrian crossings.
Does a No U-turn sign forbid turning right into a side street?
No, turning right into a side road is allowed unless a 'No Right Turn' sign is also present.