What should you do?
If you drive a tall vehicle, follow this route; car drivers can continue on the normal road.
How to recognise it
A black square with a white high-sided lorry and a white arrow pointing right above it.
Common confusion
Compare it with the heavy vehicles route sign, which shows a lorry with a weight figure.
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.
