What should you do?
Stop safely, check carefully and turn your vehicle around without driving further.
How to recognise it
A grey panel with TURN BACK above a crossed-out straight-ahead arrow and Cas ar Ais beneath.
Common confusion
Cas ar Ais is Irish for Turn Back; it is not a road name or destination.
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.
