What should you do?
Reduce speed and be ready to stop if the lights are red or change to amber as you approach.
How to recognise it
Yellow diamond showing a set of traffic lights with red, amber and green lenses.
Common confusion
The orange road works version warns of temporary signals at road works, which often control one-lane shuttle traffic.
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.
