There is a wide diversity of cities in the US. You can go to places like NYC, Boston, Seattle, San Francisco, etc. and see examples of cities with decently dens

There is a wide diversity of cities in the US. You can go to places like NYC, Boston, Seattle, San Francisco, etc. and see examples of cities with decently dense cores and functional public transit. But then you can go to cities in the South, for example, where it's almost impossible to get around without a car.