[_pmf_]

> They seem far more compatible to ride sidewalks and co-travel with pedestrians.

I agree. Bikes as road vehicles is a dangerous anachronism. Overtaking bikes is the most unpleasant exercise for me as a driver. Although, given the state of roads vs. the state of sidewalks, I understand why they choose the road.

[stephendedalus]

The other reason cyclists choose the road is because sidewalks are frequently filled with turn-ins and turn-outs. So riding on a sidewalk, even if there were no pedestrians, would be an act of putting yourself in exactly the place motorists rush to get to/from most frequently.