Table 11-1,,,,,,,,,,
Domestic Physical System Extent (Miles),,,,,,,,,,
,,,,,,,,,,
,Canada ,,,Mexico ,,,United States,,,
,1990,1995,1996,1990,1995,1996,1990,1995,1996,
,,,,,,,,,,
Road ,"552,336","560,417",U ,"148,654","191,372","194,055","3,880,000","3,912,000","3,934,000",
    Paved ,"184,803","197,546",U ,"52,149","59,988","61,618","2,259,000","2,373,000","2,380,000",
       Major road system ,N ,N ,N ,"50,652","57,652","58,973","407,000","430,000","433,000",
Less than four lanes ,N ,N ,N ,"47,221","52,054","53,032","280,000","291,000","292,000",
Four or more lanes ,"9,641","10,297",U ,"3,431","5,599","5,942","128,000","139,000","141,000",
       Local,N ,N ,N ,N ,N ,N,"1,852,000","1,942,000","1,947,000",
    Unpaved ,"367,533","362,871",U ,"96,505","131,384","132,437","1,621,000","1,539,000","1,554,000",
,,,,,,,,,,
Great Lakes ,"1,654","1,654","1,654",NA ,NA ,NA ,"4,400","4,400","4,400",
,,,,,,,,,,
Inland waterwaysa,"1,755","1,755","1,755",NA ,NA ,NA ,"26,000","26,000","26,000",
,,,,,,,,,,
Pipeline ,"170,349","192,484","195,188","11,187","9,703","9,649","1,415,646","1,462,652","1,469,534",
    Gas ,"148,556","169,554","172,223","8,049","7,118","7,050","1,206,894","1,262,152","1,269,034",
    Oil ,"21,794","22,929","22,965","3,137","2,586","2,599","208,752","200,500","200,500",
,,,,,,,,,,
Railb,"53,985","49,912","48,086","16,380","16,537","16,543","200,074","180,419","176,978",
,,,,,,,,,,
Transit rail ,N ,N ,N ,122,171,171,N ,"3,932","4,325",
aCommercially navigable.,,,,,,,,,,
"bRail extent includes yard tracks, sidings and parallel lines.",,,,,,,,,,
KEY: N = Data are nonexistent.     NA = Not applicable.     U = Data are unavailable.,,,,,,,,,,
NOTES,,,,,,,,,,
All Countries,,,,,,,,,,
"Road: The overall road total for Canada and the United States includes all roads (highways, local and others). Canada cannot",,,,,,,,,,
"disaggregate its data for local roads into paved and unpaved, however.",,,,,,,,,,
"Rail: Data include length of track, including yard tracks, sidings and parallel lines.",
"Transit rail: Data are one-way, fixed guideway",
Mexico,
Road: Data do not include local roads.,
"Road, paved: Data include major roads plus minor rural roads.",
SOURCES,
Canada,
"Road: Transportation Association of Canada. Transportation in Canada: A Statistical Overview - 1995. (Ottawa, Ont.: 1998).",
"Great Lakes and inland waterways: Transport Canada. Marine Distance Library, 1997. (Ottawa, Ont.: 1998).",
"Pipeline: Statistics Canada. Oil Pipeline Transport, Catalogue No. 55-201-XPB, and Gas Utilities, Transport and Distribution Systems,",
"Catalogue No. 57-205-XPB. (Ottawa, Ont.: various years).",
"Rail: Statistics Canada. Rail in Canada, Catalogue No. 52-216-XPB. (Ottawa, Ont.: various years).",
Mexico,
"Road: Secretaría de Comunicaciones y Transportes. Dirección General de Evaluación. Longitud de la Infraestructura Carretera, 1990,",
"1995 and 1996. (Mexico City, D.F.: various years).",
"Pipeline: Instituto Nacional de Estadística, Geografía e Informática, based on data from the Petróleos Mexicanos. Subdirección de",
"Planeación and the Anuario Estadístico (various years). (Aguascalientes, Ags.: various years)."
"Rail: Ferrocarriles Nacionales de México. Series Estadísticas 1990, 1995 y 1996. (Mexico City, D.F.: various years)."
"Transit: Instituto Nacional de Estadística, Geografía e Informática, based on data collected by the Sistema de Transporte Colectivo and"
"the Sistema de Transporte Eléctrico in Mexico City, the Sistema de Transporte Colectivo de la Zona Metropolitana de Guadalajara, and"
"the Sistema de Transporte Colectivo in Monterrey. (Mexico City, D.F.: various years)."

United States
"Road: U.S. Department of Transportation. Federal Highway Administration (FHWA). Unpublished data. (Washington, DC: 1998)."
"Great Lakes and inland waterways: U.S. Army Corps of Engineers. Navigation Data Center. Special tabulation. (New Orleans, LA:"
1998).
"Gas pipeline: American Gas Association. Gas Facts. (Arlington, VA: 1997)."
"Oil pipeline: Eno Transportation Foundation, Inc. Transportation in America. (Lansdowne, VA: 1997)."
"Freight rail: Association of American Railroads. Railroad Facts. (Washington, DC: 1997)."
"Intercity passenger rail: National Railroad Passenger Corp. Amtrak Annual Report 1996. (Washington, DC: 1996)."
"Transit rail: American Public Transit Association. Transit Fact book 1996. (Washington, DC: 1996)."