What should you do?
If you are slow, keep in the left lane; if passing, use the right-hand uphill lane and never cross into the oncoming lane.
How to recognise it
Yellow diamond with two upward arrows from a split on the left and a single downward arrow on the right.
Common confusion
The downward arrow shows one lane remains for oncoming traffic, unlike the passing lane sign.
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.
