I was at this convention one time.
When it was over, this arena had like four different exits from the parking lot.
Basically, at "worldly" events, when the show is over - it's a free-for-all and people just leave.
So people leave - of course there's a little traffic, but people JUST LEAVE.
It's simple... show's over - go home.
But whomever the brother in charge of the parking lot... blocked off entrances and made all the cars exit in a nice little line and it took forever.
Oh... it was just so orderly!!!