[mirimir]

Here we'd call them sanders or salters.

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.

[geerlingguy]

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.

[alistairSH]

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.