I live in a college town where you'd expect to find a lot of bike lanes.

And we do have them. For a few blocks at a stretch. Then they go away or merge with traffic only to pick up again a few blocks down the road.

Sometimes I need a car. I can't carry a week's worth of groceries on a bike. I can't ride to a D&D gathering when it's -35°F outside (Montana).

But situations like that notwithstanding, I could easily use a bike for 70+% of my travel needs. And yet I don't.

There is no infrastructure. And any voter initiatives to create the infrastructure will inevitably get killed by Conservatives upset that something will help a college student while not providing themselves with anything. Or purely out of spite.

I spent some time in Davis, CA and have never seen a more mature and robust system of bike paths and traffic control. Bicyclists are first class citizens and (where possible) have paths that are completely separate from motor vehicle traffic.

I would ride my bike everywhere if I could do it without the justifiable fear that I'll get run off the road for not going fast enough.