In the Midwest (Chicago) I've usually heard them referred to as just "snowplows" or "plows", which also carried salt and spread it behind them as they plowed.
It was an even bet for me between that and maintenance of oiled gravel roads. It's basically a lower cost version of asphalt. Every few years, they sprinkle some gravel, and spray with heavy oil. The odor is horrible, and vehicles get dirty.
Typically we refer to them as 'plows' or 'snowplows' in the US midwest regardless of what they're actually doing—they often (but not always) have a large plow on the front, and a salt/sand spreader on the back, or in some cases a sprayer that shoots out fine mist that gets your car all grimy and nasty for the next day or two.
The mist is called "brine", at least here in DC metro. It's usually applied before a winter weather event. Once the snow is down, we apply a normal salt/sand mix.
Incidentally, Chicago also has a a real time plow tracker: https://www.chicago.gov/city/en/depts/streets/supp_info/plow...