I travel I81 between Syracuse and the northern most towns in New York State. This time of year, especially with the Great Lakes warm and not frozen, you can go from a beautiful sunny day, dry road, 72 mph to 4 foot visability in seconds. Wednesday, there was no snow falling but a 5 mile stretch near Parish had hard packed snow that laughed at the salt. In a 1/8th mile stretch there were 14 cars scattered all over the road. Wish they'd still mix sand with the salt.
This time of year I carry my expedition parka, Carrhart bibs and Sorel boots. Not to mention some trail mix and a full tank of fuel.