I don't remember anyone getting driven to school every day. Granted, I may have not noticed, but when school let out there were great waves of kids on foot crossing every surrounding street.
If you lived too far to walk, you took the bus. And if I missed the bus, I walked fast. Well, on the way in. Coming home I'd walk unless it was raining, and take my time about it.
Today, all the schools have cars queued up for dismissal, and I'd guess a third of the grade school population is dropped off and picked up.