What should you do?
Do not use it, even to turn around or stop.
How to recognise it
A blue rectangle with Feithiclí Údaraithe Amháin / AUTHORISED VEHICLES ONLY.
Common confusion
It is a restriction on access, so don't treat it as information.
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.
