There's a good suggestion I heard to bike of the Triboro Bridge into Manhattan. It's little used by pedestrians.
What I don't get is how come when the bridge turns into a parking lot for cars, all the moving traffic (bike and peds) get's crammed into one lane and the most efficient way of moving (bike) has to walk?
Give more of the "traffic" lanes over to traffic that actually moves! It's more efficient. Using a bridge as a parking lot doesn't help anybody get into the City.