Use common sense and understand how a snow plow and salt works. They definitely only function to remove built up snow to make it easier for vehicles to pass through under essential travel. It's not possible for them to take the bucket right to the asphalt, and they also risk damaging equipment and the road surface if they try. Plus, as others have already said, salt doesn't work at these low of temps, and what does melt just refreezes into a sheet of ice. It's not feasible for the city to pay out millions of dollars so someone can drive their junky Pontiac G6 for two days as if it were normal driving conditions. Ice is okay to drive on, provided people aren't idiots.

AKA: Damn Jackie, I can't control the weather.