Ken- NYC and other northern east-coast municipalities have sockets and hydraulics to fit blades to garbage-trucks. Only thing they're good for is pushing the straight-street segments, as they've got too long a wheelbase to do much else.
Since they don't have a whole-lotta space to actually 'put' the snow, they typically use either a big auger on articulated loader, like what's on John's picture, shoot it into trucks and send it into the nearest ocean/river, or a few places have a truck with auger on front, and a big oven on back, that melts the snow, and a hose that hangs out one side, to drain it into the storm sewers.
Either way, in big cities, heavy-snow periods tend to be a favorite time-of-year to dispose of dead bodies... dumped in a pile of snow, it's easy for the 'evidence' to get transported to a dumpsite, or shredded and burned, before anyone figures it out. :-\ Sick, eh?