Let’s say after ww2, the United States builds a national railroad system alongside the interstate for public transportation. The railroad system is more modern and separate from the old one that is now used for transportation of resources and economics only. It only goes from and to major cities or state capitals. Each state in the main 48 states has at least one train station center. A state like Wyoming would only have one go through its capital. The northeast coast, California, and Florida are given multiple smaller tran systems within their region and cities due to the population and situation there. You pay to use the train like the airport but it is much cheaper and easier to do. Is this possible? How would it work? What impact will it have? Is America size and terrain too much for even this? How would train travel in America develop if something like 911 still happens? Would immigrant populations be more spread out? For this pod, the rail system has to be at least good enough to get you from city to city without taking forever. The train ride to one city to an other must at least be less or around the same time as a car ride there but preferable shorter.