Yeah, there's more to it than just population density. There also needs to be a sufficient density of walkable places for people to take transit to, and that's

Yeah, there's more to it than just population density. There also needs to be a sufficient density of walkable places for people to take transit to, and that's also missing in much of American suburbia. Bog standard suburban strip mall is way too spread out and buried in a sea of parking lots. They're simply not designed around pedestrian travel.