BECAUSE YOU CAN'T GET ENOUGH OF THE TRAIN:

Metro-North Considering Double-Decker Trains to Reduce Crowding (MICHAEL M. GRYNBAUMm 8/16/10, NY Times)

Some New Yorkers who take the railroad to the city may soon enjoy an amenity more common to Paris than Ossining: the double-decker ride.

The Metro-North Railroad is seriously considering buying double-decker coaches for its Harlem and Hudson commuter lines, in a move to ease overcrowding on a rail network that routinely runs standing-room-only trains during rush hour.