What should you do?
If driving a vehicle over 7.5 tonnes, follow the arrow; car drivers can continue normally.
How to recognise it
A black square with a white lorry marked 7.5t and a white arrow pointing left.
Common confusion
It is route guidance, unlike the red-ringed weight limit sign, which prohibits entry.
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.
