National Transportation Statistics 2011. Bureau of Transportation Statistics

摘要

Compiled and published by the U.S. Department of Transportation's Bureau of Transportation Statistics (BTS), National Transportation Statistics presents information on the U.S. transportation system, including its physical components, safety record, economic performance, energy use, and environmental impacts. National Transportation Statistics is a companion document to the 'Transportation Statistics' Annual Report, which analyzes some of the data presented here, and 'State Transportation Statistics', which presents state-level data on many of the same topics presented here.