Well, there are submarines running on nukes instead of diesel, but doing that on land might raise a few eyebrows ... The real point is that cost of fuel is a l

Well, there are submarines running on nukes instead of diesel, but doing that on land might raise a few eyebrows ... The real point is that cost of fuel is a lower percentage of total costs for railroads (a casual search hit on a 1997 guidebook said 7.1% vs. 13.5% for trucking).