When I was a child it was quite unusual for other children at my school (private school, well-off families) to be dropped off at school by car in the morning. It would have been at least 95% who either caught a bus, rode a bike or walked.

I was walking to school with my older sister at age four. At age 6 I was doing a fairly long bus ride with her (and we walked down to the bus stop of course). The rest of my school life was mostly riding and walking to school. And this was completely unremarkable. What was remarkable were the kids who were dropped off at school; I viewed it as a somewhat eccentric practice.

When I was a kid growing up in the Pacific Northwest I would say adults biked less but kids walked/biked more than today. I think adult biking is massively more popular and accepted today than in the 80s.

Agreed on the biking.

I remember begging my parents to let me bike to school because all the "cook kids" rode their BMX bikes to school and the bike racks were overflowing with kids who were biking to school. I remember being made fun of in the summer for taking the bus instead of riding my bike.

I don't remember seeing bike racks at any of the schools my sisters kids attended.