Since roads where it snows are always getting torn up and repaved, if automated cars do become widespread, it seems entirely feasible and realistic to line majo

Since roads where it snows are always getting torn up and repaved, if automated cars do become widespread, it seems entirely feasible and realistic to line major roads on each side with radio reflectors or some other cheap system that can keep automated plows from driving off the road. The real problem is the cost of the automated plow itself. A 10-wheel plow with salt feeder isn't exactly cheap to run with or without a driver.