The U.S. seems to be able to maintain a quite impressive railroad system for freight purposes, in what is still the largest rail transport network of any countr

The U.S. seems to be able to maintain a quite impressive railroad system for freight purposes, in what is still the largest rail transport network of any country in the world. Passenger transport withered away as long-distance road travel and cheap air flights out-competed it. With sufficient ingenuity and capital expenditure, I wonder if perhaps it could be revived?