Ciao amico.
Well, I have to watch the bit again cause I didn't quite catch anything on the first time. I have to rewatch it anyway cause I make italian subtiles of TG for italiansubs.net
Wheter if it's you can't film or you can't drive it sounds weird to me, they are stopped on the A25 (or A24, i always confuse those) and I can't see the problem anyway. It's strange really...
Maybe, but it's a very long shot, they were stopped because there was some camera crew on the back of their cars filming from the car trunk (like they usually do, like we've seen many times in the past), then the police saw them and stopped the crew and told them "you can't film like that (because it's dangerous)"