What should you do?
Continue until you can legally turn around, for example at a roundabout, rather than turning across the road.
How to recognise it
A red-ringed circle with a black U-shaped arrow and a red diagonal bar through it.
Common confusion
Do not confuse it with the No right turn sign; this one shows the arrow looping back on itself.
Explanation written by the My Driving Test editorial team using the Department of Transport Traffic Signs Manual conventions and the RSA Rules of the Road.
