What should you do?
If exiting, you should already be in the left lane and signalling, with your speed under control.
How to recognise it
A blue rectangle with one white diagonal bar.
Common confusion
One bar means 100m, not 1 km; don't wait until this sign to start changing lane.
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.
