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Department of Transportation Office of Freight Management and Operations, Feight, Facts and Figures 2011.

机译:交通运输部货运管理和运营办公室,2011年的运动管理和事实。

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摘要

This report provides an overview of freight transportation, focusing on the volume and value of freight shipments, the extent of the freight network, industry employment and productivity patterns, and related safety, energy use, and environmental effects. Economic and social characteristics of the United states also are provided as background information. Metric data are available for several table as well.

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