So essentially buses. That works if you live within a few miles of your destination city. But things are so spread out nowadays that there's just no way that you could have a single system of buses or streetcar. Whatever to make use of everybody's time.

I grew up in suburban America where even on bike it would take me 20 minutes to get to the nearest urban development or business. Let alone trying to get to the nearest city. And now with everybody so spread apart of where they work and how they get there. There's just no feasible way to make the system for everybody.

People used to live within a few miles of where they worked, but nowadays everything has been built for cars and to undo that would be an almost impossible effort