What should you do?
Slow down, take great care in darkness, fog or ice, and keep well back from the unprotected edge.
How to recognise it
Yellow diamond with a car tipping off a ledge into wavy water lines.
Common confusion
Unlike the uneven surface sign, this warns of a drop into water, not a damaged road edge.
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.
