From the U.S. Dept. of Transportation:
The Bureau of Transportation Statistics (BTS) today released Freight Facts and Figures 2015. This 11th edition is an in-depth report on the volume and value of freight flows in the United States; the extent, condition, and performance of the physical network over which freight moves; the economic conditions that generate freight movements, the industry that carries freight, and the safety, energy, and environmental implications of freight transportation. Freight Facts and Figures 2015 consists of 62 data tables and 31 figures, including 20 maps.