The van driver is impatient.
What I can see is;
1) the van signal was tad bit last minute (ts is still moving when he first signalled)
2) TS is on the yellow petak already and moving (slow, but moving)
3) the van seems to be accelerating to take the turn.

ask urself. If u are at the van's POV, do you stop before the yellow petak and wait for TS to pass through first or you'd do the same?