Colorado uses magnesium chloride. It leaves a white film on your windshield & car, kills any vegetation it touches and contaminates ground water.
Still better than beet juice.
For keeping the road liquid until about 25 deg, Then it freezes and you can’t see out of your windshield because it takes a gallon of wiper fluid to clean your windshield and you’re always running out. Did I mention it contaminated ground water? And kills vegetation? Our mountain passes are lined in dead trees, tourists wonder about that. When told it’s the road “salt” they ask why don’t we use regular salt. It would kill trees slower, and cause our cars to rust, but it wouldn’t be adding poison to our water. Using regular sand would be better.