1-1 The Transportation Network: 2006

1-1 The Transportation Network: 2006

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Mode Components
Highway  
Public roads 46,893 miles of Interstate highway
116,573 miles of other National Highway System roads
3,869,541 miles of other roads
Air  
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
Rail (2007)  
Miles of railroad operated 94,313 miles by Class I freight railroads in the United Statesb
16,930 miles by regional freight railroads
28,891 miles by local freight railroads
21,708 miles by Amtrak (passenger)c
Urban transit  
Directional route-milesd Bus: 168,255e
Trolley bus: 424
Commuter rail: 4,490
Heavy rail: 1,603
Light rail: 1,178
Stations Commuter rail: 1,169
Heavy rail: 1,042
Light rail: 764
Water (2007)  
Navigable channels: 26,000 miles
Ferry routes: 620 directional route-miles
Commercial waterway facilitiesa  
Great Lakes: 600 deep-draft
154 shallow-draft
Inland: 2,321 shallow-draft
Ocean: 4,466 deep-draft
2,043 shallow-draft
Locks: 257
Pipeline  
Miles of oil pipe Total oil: 169,346
Miles of gas pipe Transmission: 300,400
Distribution: 1,214,000

a See Glossary for definitions. b There are also 561 miles of railroad operated within the U.S. Class I freight railroad system that are owned by Canadian railroads. c Approximately 97% of the trackage on which Amtrak operates is owned by freight railroads. 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: Highway—: USDOT, FHWA, Highway Statistics 2006 (Washington, DC: 2008), table HM-18. Air— USDOT, RITA, BTS, Airport Activity Statistics of Certificated Air Carriers, Summary Tables, 12 Months Ending Dec. 31, 2006. Rail— Association of American Railroads, Railroad Service in the United States 2008. Transit— USDOT, Federal Transit Administration, National Transit Database 2006, tables 21, 23, and 24. Commercial waterway facilities— U.S. Army Corps of Engineers, Institute for Water Resources, Navigation Data Center, The U.S. Waterway System Facts, December 2007 (Alexandria, VA: 2007). Navigable channels: U.S. Army Corps of Engineers, Pipeline— PHMSA as cited in USDOT, RITA, BTS, National Transportation Statistics, tables 1-1, 1-3, and 1-10, available at http://www.bts.gov as of November 2008.