Digging out snow tile by tile can be pretty tedious. And it's necessary to plant in the spring, when planting is possible but the snow hasn't melted off yet. So... snow plows!
I'm thinking itd be good to either add a new snow plow vehicle, or to make current wood and melt plows remove snow on any tile they pass through (which would necessitate them also being able to travel over tiles they can't currently, like paving).