What they did was close down some entrance ramps to the bridge from the town on the New Jersey side of the river.
Unless you were coming from that town, you wouldn't have noticed any difference if you crossed the bridge that day.
I lost hours of my life stuck in traffic on the GW when Chris Christie was still in law school.
The interesting part was that (if I read it correctly), the judge said that they didn't need to prove motive, just conspiracy.
That's interesting because the mayor was rated a "4" on a 10 point scale for endorsing Christie in the first place, so punishing him for not endorsing Christie didn't make much sense. Lacking a motive the whole case falls apart, but the judge said that's okay.
The one (IMO) who is responsible for this fiasco is David Wildstein and of course he's the one who is going to skate.