Table 1,,,,,
The Transportation Network: 2000,,,,,
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Mode,Components,,,,
Highway,Public roads,,,,
,"46,677 miles of Interstate highway",,,,
,"114,511 miles of other National Highway System roads",,,,
,,,,,
,"3,789,927 miles of other roads",,,,
,,,,,
Air,Public-use airports,,,,
,"5,317 airports",,,,
,,,,,
,Airports serving large certificated carriers,,,,
,"29 large hubs (72 airports), 479 million enplaned passengers (see Glossary for definition of ""hub"") ",,,,
,,,,,
,,,,,
,"31 medium hubs (53 airports), 102 million enplaned passengers ",,,,
,,,,,
,,,,,
,"54 small hubs (69 airports), 40 million enplaned passengers",,,,
,,,,,
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,"585 nonhubs (610 airports), 18 million enplaned passengers",,,,
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Rail,Miles of railroad operated,,,,
,"120,022 miles by Class I freight railroads in the United Statesa",,,,
,,,,,
,,,,,
,"20,978 miles by regional freight railroads",,,,
,"28,937 miles by local freight railroads",,,,
,"22,741 miles by Amtrak (passenger)",,,,

Urban transit,Directional route-miles servicedb,,,,
,"Bus: 160,506",,,,
,Trolley bus: 469,,,,
,"Commuter rail: 5,209",,,,
,"Heavy rail: 1,558",,,,
 ,Light rail: 834,,,,
,Stations,,,,
,Commuter rail: 983,,,,
,"Heavy rail: 1,009",,,,
,Light rail: 603,,,,
Water,"26,000 miles of navigable waterways",,,,
,Ferry routes: 487,,,,
,Commercial waterway facilitiesc,,,,
,Great Lakes:,611 deep-draft,,,
,,143 shallow-draft,,,

,Inland:,"2,367 shallow-draft",,,

,Ocean:,"4,079 deep-draft",,,
,,"2,109 shallow-draft",,,

,Locks:,276,,,
Pipeline,Oil,,,,
(1999),"Crude lines: 86,000 miles of pipe ",,,,
,"Product lines: 91,000 miles of pipe ",,,,
,,,,,
,Gas,,,,
,"Transmission: 254,000 miles of pipe ",,,,
,"Distribution: 981,000 miles of pipe ",,,,

a There are also 575 miles of railroad operated by U.S. Class I freight railroads in Canada and Mexico. ,,,,,,,,
b Directly operated service. Does not include contracted service.,,,,,,,,
c See Glossary for definition of commercial waterway facilites.,,,,,,,,
"Sources: Various sources, as cited in U.S. Department of Transportation (USDOT), Bureau of Transportation Statistics, National Transportation Statistics 2001, available Spring 2002 at www.bts.gov, or email to answers@bts.gov; Association of American Railroads, Railroad Facts, 2001 (Washington, DC: 2001); USDOT, Federal Highway Administration, Highway Statistics 2000 (Washington, DC: 2001); National Ferry database, as of October 2001; and U.S. Army Corps of Engineers, Navigation Data Center,  The U.S. Waterway System, Transportation Facts, available at www.wrsc.usace.army.mil/ndc/fcgeodis.htm, as of November 2001.",,,,,,,,
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