What should you do?
If you are driving slowly, move into the left lane, and if you are passing, take care when the lane ends and traffic merges.
How to recognise it
A white rectangle with black arrows showing a lane branching to the left, and a plate showing 200m.
Common confusion
It is not an exit sign; the extra lane rejoins the main road further on.
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.
