Many people driving cars, he says, behave differently than they do when walking or riding a bike.
Heâ€™s seen that change in himself, and he doesnâ€™t like it. He hasnâ€™t owned a car for a decade. When he borrows one or rents one for out-of-town trips, he becomes angrier, lazier. He notes how little he notices the people around him, the neighborhoods, the topography. He doesnâ€™t feel the hills.
When heâ€™s driving, he becomes angry at people driving too slow or too fast. He doesnâ€™t like feeling that way.
So he bikes.