You really can't have convenient public transit that replaces cars in our current carcentric metroareas. The density isn't there. You'd have to totally dismantl

You really can't have convenient public transit that replaces cars in our current carcentric metroareas. The density isn't there. You'd have to totally dismantle the suburbs, which most people live in. Unless you mean point-to-point buses, but that's just uber. You could slowly do it over decades in places primed for growth. Places like Arlington, Va are being urbanized.