> which is not dense enough for public transportation to work well You lose me here. I live in a major metro area and public transportation works fine, even

> which is not dense enough for public transportation to work well You lose me here. I live in a major metro area and public transportation works fine, even out into the suburbs where it is not as dense, but the public transit spokes out to the major hubs and people drive to those transit stations and park for the day. Public transportation works for the vast majority of the country.