Driving too fast for conditions
Very few drivers know how to down shift these days, thereby letting your engine act as a brake. This is because most drivers NEVER learned to drive a standard. They think that antilock brakes will stop them on snow and ice. The last few weeks here in snowy NH, I have Relearned the benefit of 2nd gear and low gear. I grew up to the south of Buffalo where snow like this was just a normal winter.
My driveway has about a 20 degree incline. I have gone through probably 20 bags of rock salt and calcium chloride so far this winter. Most of it in the last couple weeks. Another 8-12” coming between Saturday and Monday.
I have 4-6 FOOT snow banks at my house in southern NH. My office parking lot here in Nashua has piles that are 20’ high. It reminds me of 1977/1978 in Western NY.