What should you do?
Car drivers can use the lanes normally but should expect large lorries to stay in the left lane.
How to recognise it
A white rectangular panel with two upward lane arrows separated by a broken line and a small red-ringed axle symbol marked x3 under the right lane.
Common confusion
Do not confuse it with the general No overtaking sign, which applies to all vehicles and shows two cars side by side.
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.
