When I lived in Roswell, GA (suburban Atlanta), North Fulton County which includes fairly affluent areas tried to form a separete County from the rest of Fulton County which include the city of Atlanta. It did not happen after an intense and expensive attempt. It would have likely eliminated the limited public transportation that existed in that part of the county. Atlanta includes a lot introverted people who are happy to be in their automobiles even if they are stuck in parking lot traffic. Most of the people did not know that Amtrak came to Atlanta or know where the station was.