To everyone's questions -
Phil T: Drivers keep warm wearing Carhartt arctic coveralls, pack boots, snowmobile helmets, etc. A heat houser on every tractor helps too.
Al L: Taxpayers fund the snowplowing. (It's one of the reasons the area has the second highest overall tax burden in the entire nation....)
47fivewindow: Driver pay is privileged info. It is however lucrative(!)
dgoodman2: They've found nothing clears sidewalks better and faster than a narrowed 40's era row crop tractor. And compared to a skid steer, compact tractor, tracked (Bombardier) sidewalk plow, the old tractors are inexpensive to purchase, hard to break and easy to fix.
Charlie M: These guys plow the entire city - can't pick and choose which neighborhoods to avoid. Fortunately with a 0 deg windchill and 30" of fresh snow the streets are pretty much free of bad guys - and everyone else - during a plow run.
jeffcat: Unsure of the actual number of plows - there's a couple contractors doing this in the city. I'm guessing however a total 40 or so tractors altogether, including spares.