From past experience, I can tell you it was a bummer when there was an accident ahead of us on the old bridge. We had to sit there for a couple of hours once; little room to turn around and no need to even try, because the bridge was also blocked behind us because a car pulling a trailer had tried to turn around back there and had jackknifed.
Actually, it was a sort of party going on. People were out of their cars and wandering around, talking, sharing beers and snacks. Kids were running around. People were stretched out on chairs getting a tan.
I would have, of course, rather not had my trip delayed, but it could have been worse. Only problem....no porta-potties.