What should you do?
If you drive a tall vehicle, check the clearance and choose a suitable route in advance.
How to recognise it
A white rectangular sign headed LOW BRIDGES at Port Laoise, with route numbers, clearances and yellow warning symbols.
Common confusion
It gives advance information; the regulatory height restriction sign is circular with a red ring.
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.
