U.S. Department of Transportation"This section presents data on civil air transportation, both passenger and cargo, and on water transportation, including inland waterways, ocean-borne commerce, the merchant marine, cargo, and vessel tonnages. This section also presents statistics on revenues, passenger and freight traffic volume, and employment in various revenue-producing modes of the transportation industry, including motor vehicles, trains, and pipelines. Data are also presented on highway mileage and finances, motor vehicle travel, accidents, and registrations; and characteristics of public transit, railroads, and pipelines."