Above the plusstrook of the A32, the electronic sign shows an arrow angled to the right. There is no red cross yet. What does that mean?
The lane is about to close; leave it now, before the red cross appears
As long as there is no red cross, you may simply keep driving
Explanation
False — trap: warning phase ignored. The angled arrow is the phase before the red cross: clear the lane, move to the fixed lane in good time (Book p.74).