What should you do?
Move into the right lane early, using mirrors and signals, and let others merge.
How to recognise it
Orange diamond with a blocked bar topped by a crossbar on the left and an upward arrow on the right.
Common confusion
Opposite of the offside lane closed sign; the blocked bar shows which lane is shut.
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.
