|Year||Air carrier, large certificated, domestic, all services||Highway||Transit
KEY: U = Data are unavailable.
NOTES: Transit rail modes are measured in car-milesthe movement of 1 vehicle the distances of 1 mile. This differs from a train-milethe movement of a train, which can consist of multiple vehicles (cars), the distance of 1 mile. The Transit mode increased by 137 million car-miles from 2007 to 2008 and 100 million car-miles from 2008 to 2009. Rail train-miles decrease by 87 million from 2008 to 2009.
SOURCES: Air Carrier: Research and Innovative Technology Administration, Bureau of Transportation Statistics, Office of Airline Information; Highway: Federal Highway Administration; Transit: Federal Transit Administration; Rail: Association of American Railroads as cited in U.S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics, National Transportation Statistics, table 1-34, available at http://www.bts.gov/publications/national_transportation_statistics/ as of April 2011.