What should you do?
Slow down, give way to traffic from the right, and drive around the central marking rather than over it where possible.
How to recognise it
A blue disc with three white curved arrows forming a clockwise circle.
Common confusion
It is a mandatory blue circle, unlike the triangular roundabout warning sign, which only warns that a roundabout is ahead.
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.
