What should you do?
Keep left unless overtaking, and use the extra lane to pass slower vehicles only when it is safe and within the speed limit.
How to recognise it
Yellow diamond with a single arrow that splits into two upward arrows.
Common confusion
Different from the climbing lane sign, which also shows a downward arrow for oncoming traffic on a hill.
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.
