What should you do?
Hold the steering firmly, reduce speed and allow extra space around cyclists, motorcyclists and high-sided vehicles.
How to recognise it
Yellow diamond with a black windsock blowing to one side.
Common confusion
It is about wind force on your vehicle, not about the road surface being slippery.
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.
