What should you do?
Only enter if your destination is on the road, and be ready to turn around safely at the end.
How to recognise it
A white square with a black T shape whose top bar is red.
Common confusion
The red bar shows the blocked end, so do not confuse it with a T-junction warning sign, which is a yellow diamond.
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.
