While reading this thread I've been asking myself why I didn't ride my bike to junior and senior high school in the 60's. I had a bike and would sometimes go on long rides, the longest 110 miles.
It was only about 2 miles to school, though uphill (Queen Anne in Seattle). Maybe that had something to do with it. I honestly can't remember ever even thinking about it. It seems odd now. We would carpool to school, but I usually had to walk home.
Maybe a bike lane on the main route would have made a difference, but I doubt it. I'm guessing it was because NO one rode a bike to school then... at least no one I knew. I don't remember seeing bikes in racks. Maybe the only riders were guys in the science club. Dunno.
What I DO know, is that if it was 'cool' to ride to school, if friends rode their bikes, I would have cycled to school. Also, if my parents or the others who I got rides from had said, 'No, I'm not driving you to school. Why don't you take your bike?' I probably would have biked it. But I'm just guessing.
Again, it really puzzles me that I have no recall of ever even considering riding to school.