Tidal flow lane control
Lane closed ahead; you should move to the next lane on the left as soon as traffic conditions allow
What it means
The white diagonal arrow warns that your lane closes further on and points you to the next lane on the left. It gives you room to plan, so use it: mirrors, signal, check your blind spot and move over while there is still a gap, rather than at the closure itself.
Test yourself on signs like this one
Free with an account. Each answer tells you what the sign means, not just whether you were right.
