He was probably too arrogant to pay attention to traffic sighs.
We have a bus trap in my city that will trap your car if you go over it. There are signs that give lots of warning about it, but at least twice a month, people get trapped any way.
It then becomes a race between the tow truck driver to get you out and the cops to write you up.
Well, that's a challenge. Some days one's luck just runs out, no matter what.