I have the same issue. The traffic never flows. My solution to this was saying "Well, that's enough!" and just rolling over the other cars. Before doing this, I've waited around 30mins patiently but the cars never move.

Hi, While on the way to Vicenza from Verona, I hit an invisible wall which damages the truck too badly. It happened once also in France I guess, but at that time I was on phone so I thought I'd hit somewhere else. But I think it might be an invisible wall as well, because when I checked what happene...