If US like the rest of the world, make trains popular and brings the costs down for trains and actually has more connectivity. The distance will quickly not become a problem. Like I said all we need is a sleeper coach, and we just have comfortable nap to the destination over night. India is able to transport millions of people in 2500+ KMs routes a day, you are looking at the people who are forced to pay and travel in those forsaken airliner comfort. Trains will only bring more people together when they connect more and make it affordable.