Isn't it the opposite. Most long haul goods in the US are sent by train, while in Europe the trains are used to move people?
The economies of scale definitely weigh in favor of rail transportation at long distances, but trucks can cover long distances faster in the U.S. — so they are generally used to haul time-sensitive loads even when the shipping rates are lower for rail. Fresh produce from California, for example, is shipped to the east coast by truck even though it would be much cheaper to move it by rail.