> low density sprawl Hypothetically more of these cities could start to build out subway, light rail, heavy rail networks; which would support higher density.

> low density sprawl Hypothetically more of these cities could start to build out subway, light rail, heavy rail networks; which would support higher density. But American cities don't seem to be capable of that. Maybe it's a lack of money, maybe a lack of political will, maybe it's American car culture. But it's irrelevant. It takes a really long time to build out that infrastructure, and in the meantime, the city has the infrastructure that it has, which is insufficient for keeping both housing costs and commuting times down.