Burlington Northern

Burlington Northern is a freight carrier. Warren Buffet said at Columbia Business School that railroads are "environmentally friendly and the most efficient" for moving freight. It can move "1 ton of freight 470 miles on 1 gallon of deisel." It sounds great but I would need to compare what it costs to move freight using semis on freeways. If this is true, there should be an explosion of new rails across America to move freight.