For pedestrians and bikers, you need a lot less surface to deice, plus the lower speeds means it is not quite as vital to see all the snow gone directly. And yes, you will need roads for different purposes, but you would need a lot fewer of them, and with fewer lanes, if everyone wouldn’t take the car. Also, for supplying stores, a lot of the things trucks do can easily be done by trains.
This picture comes to mind:
For pedestrians and bikers, you need a lot less surface to deice, plus the lower speeds means it is not quite as vital to see all the snow gone directly. And yes, you will need roads for different purposes, but you would need a lot fewer of them, and with fewer lanes, if everyone wouldn’t take the car. Also, for supplying stores, a lot of the things trucks do can easily be done by trains.