The train system would have two rails opposite each other. Freight would run separately from passenger service. Short haul trucking would prosper. Auto sales to rental companies would prosper if people were traveling more. Sales of small cars and hybrid trucks might surge. Thinking with the long view being a change in how we move around in America and power that change. Nuclear powered electric power is my thought. Wouldn't happen overnight, but would be a plan with a vision and might take 25 years. Americans need leaders who take a long view of our future who have a vision for progression into the 21st century.
The nay sayers regarding oil are fools. Obama just put his foot in his mouth again a day or so ago when he proposed we reject our "addiction to oil". Some Americans are so gullible to high sounding speech with no substance or answers. Oil and gas are what makes the world go round at the moment. Maybe not in 50 years, but in the short run it is the only viable means of freedom and prosperity that would lead us into the paradigm shift that's needed. So we need to get it, refine it and use it. 50 years is a short time and a long time. It's short in the vast scheme of things, but it's two generation of investment and wealth creation with an eye toward the segue into whatever shakes out as the replacement for oil. Electricity probably will be the answer.