Table 3-1. Miles and Kilometers of Infrastructure by Transportation Mode (Historical)

Table in Excel format

	1980	1990	2000	2001	2002	2003	2004	Percent change, 1980-2004
Public roads, route miles	3,859,837	3,866,926	3,951,101	3,963,264	3,981,670	3,989,847	3,997,462	3.6
National Highway System (NHS)	N	N	161,189	161,421	161,539	161,801	162,158	N
Interstates	41,120	45,074	46,673	46,714	46,748	46,769	46,837	13.9
Other NHS	N	N	114,516	114,707	114,791	115,032	115,321	N
Freight Intermodal connectors1	N	N	N	N	1,791	1,853	NA	N
Other	N	N	3,789,912	3,801,843	3,820,131	3,858,047	3,835,303	N
Strategic Highway Corridor Network (STRAHNET)	N	N	62,066	62,784	62,792	62,576	62,257	N
Interstate	N	N	46,675	46,717	46,747	46,773	46,837	N
Non-Interstate	N	N	15,389	16,067	16,045	15,803	15,420	N
Railroad	183,0772	175,909	170,512	142,633	141,391	140,939	140,246	-23.4
Class I	NA	133,189	120,597	97,631	99,943	98,944	97,496	NA
Regional	NA	18,375	20,978	17,439	15,048	15,648	15,641	NA
Local	NA	24,337	28,937	27,563	26,400	26,347	27,109	NA
Inland waterways
Navigable channels	11,000	11,000	11,000	11,000	11,000	11,000	11,000	0.0
Great Lakes-St. Lawrence Seaway	2,342	2,342	2,342	2,342	2,342	2,342	2,342	0.0
Pipelines
Oil	218,393	208,752	176,996	158,489	161,189	160,868	NA	NA
Gas	1,051,774	1,189,200	1,369,300	1,373,500	1,411,400	1,424,200	1,462,300	39.0

Key: N = not applicable; NA = not available.

¹Excludes intermodal connectors serving intercity bus, Amtrak, and public transit facilities.
²Excludes Class III railroads.

Sources: Public roads: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, (Washington, DC: Annual issues) table HM-16.
Intermodal connectors: U.S. Department of Transportation, Federal Highway Administration, Office of Planning, National Highway System Intermodal Connectors, available at https://www.fhwa.dot.gov/hep10/nhs/intermodalconnectors/index.html as of July 5, 2005.
Rail: Association of American Railroads, Railroad Facts (Washington, DC: various issues).
Navigable channels: U.S. Army Corps of Engineers.
Great Lakes-St. Lawrence Seaway: Great Lakes-St. Lawrence Seaway System, "Seaway Facts," available at http://www.greatlakes-seaway.com/en/aboutus/seawayfacts.html as of Jan. 26, 2006.
Oil pipelines: 1980-2002: Eno Transportation Foundation, Transportation in America, 2002 (Washington, DC: 2002). 2003: U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration, Office of Pipeline Safety, Pipeline Statistics, Internet site http://ops.dot.gov/stats/lpo.htm as of July 5, 2005.
Gas pipelines: American Gas Association, Gas Facts (Arlington, VA: Annual issues).