You cannot effectively prep roads for a snowstorm. Snow and ice clearing has to be done during the storm not before or waiting until after. States with a lot of snow already know how to do it and because it is a necessity they provide the funding to do that. With equipment, people and training. Sheltered locations for sand/salt etc. Trucks with spreaders for sand/salt and plows in the front. States that do not have major winter storms regularly, cannot get the government to put money in snow removal. Here in Central Carolina they put that money into roadside wild flowers. In the general Raleigh/central NC area they spend enough money for flowers alone to put heat units in the highways, But they don't. I can't speak for other places but the largest line item on Vermont's budget was winter snow/ice removal. Drivers were trained and if they wanted to keep their jobs they learned quickly how to drive in the stuff and were called in usually before the storm started. The job they did was amazing. As I said, only surprise major storms caught us off guard. I can remember only two in my lifetime plus on major Ice Storm that is impossible to do anything about.
Quick story, in 1980 my wife and I left Vermont for a quick golfing vacation in Myrtle Beach. It was late February. We headed out in cold but clear weather and by the time we got to DC they had started to close the interstates to traffic due to snow. We found a hotel just to the west of DC and settled in. The next morning there was, at least, 18" of snow on the ground and it extended all the way down to Georgia. There was no snow removal equipment to be found down there, not even a shovel. Any restaurants that were open were staffed by the people that got stuck there the night before. Truckers having to keep moving and blow the snow off one lane of I-95 so it was passable but only one lane. Now the southern states have a modest amount of appropriate equipment, but still don't have a clue how to use them. So they have all just adopted the policy of not going out until after the storm, after the pileup and the traffic jams have happened.