|Public roads||46,871 miles of Interstate highway
115,502 miles of other National Highway System roads
3,849,259 miles of other roads
|Public-use airports||5,233 airports|
|Airports serving large certificated carriers (enplaned passengers)||26 large hub areasa (67 airports), 487 million passengers
37 medium hub areas (62 airports), 141 million passengers
67 small hub areas (83 airports), 53 million passengers
924 nonhub areas (959 airports), 23 million passengers
|Miles of railroad operated||95,664 miles by Class I freight railroads in the United Statesb
15,388 miles by regional freight railroads
29,197 miles by local freight railroads
23,000 miles by Amtrak (passenger)c
|Urban transit (2005)|
|Directional route-milesd||Bus: 168,639e
Trolley bus: 429
Commuter rail: 4,450
Heavy rail: 1,601
Light rail: 1,091
|Stations||Commuter rail: 1,164
Heavy rail: 1,042
Light rail: 730
|Navigable channels||26,000 miles|
|Ferry routes||639 directional route miles|
|Commercial waterway facilitiesa|
|Great Lakes||600 deep-draft
|Ocean|| 4,398 deep-draft
|Miles of oil pipe||Crude lines: 60,043
Product lines: 71,310
|Miles of gas pipe||Transmission: 296,400
a See Glossary for definitions.
b There are also 1,368 miles of railroad operated within the U.S. Class I freight railroad system that are owned by Canadian railroads.
c The Amtrak mileage includes the 745 miles of trackage it owns and route-miles operated on on freight railroad tracks.
d Directional route-miles includes only directly-operated service. Does not include contracted service.
e Includes directional route-miles on exclusive right-of-way, controlled right-of-way, and mixed traffic.
Sources: Various sources, as cited in USDOT, RITA, BTS, National Transportation Statistics, available at http://www.bts.gov; Association of American Railroads, Railroad Facts, 2006 (Washington, DC: 2006); USDOT, Federal Highway Administration, Highway Statistics 2005 (Washington, DC: 2006), table HM-18; Oil & Gas Journal, Sept. 11, 2006; USDOT, Federal Transit Administration, 2005 National Transit Summaries and Trends, tables 21, 23, and 24, available at http://www.ntdprogram.com/ntdprogram/pubs.htm; USDOT, RITA, BTS, "Airport Activity Statistics of Certificated Air Carriers, Summary Tables, 12 Months Ending Dec. 31, 2006," 2006; U.S. Army Corps of Engineers, Institute for Water Resources, Navigation Data Center, The U.S. Waterway System Facts, February 2007 (Alexandria, VA: 2007).