Table 1-6: Estimated U.S. Roadway Lane-Miles by Functional Systema,,,,,,,,,,,,,,,,,,,
,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997,d1998,1999,2000,2001,2002,2003,2004,2005,2006
TOTAL lane-miles,"7,922,174","8,017,994","8,051,081","8,087,793","8,124,090","8,132,196","8,143,014","8,158,253","8,178,654","8,242,437","8,160,858","8,177,983","8,224,245","8,251,847","8,295,171","8,315,121","8,338,821","8,371,718","8,420,589"
"Urban, total","1,395,245","1,542,339","1,670,496","1,682,752","1,758,731","1,803,775","1,825,877","1,840,107","1,857,649","1,882,676","1,891,608","1,895,986","1,915,503","1,967,047","2,006,436","2,108,650","2,199,155","2,263,360","2,308,602"
Interstates,"48,458","57,295","62,214","62,826","67,266","69,184","70,832","71,377","71,790","72,257","73,006","73,293","73,912","74,463","75,107","79,591","82,926","85,986","87,944"
Other arterialsb,"333,673","371,649","399,376","402,360","418,208","435,386","442,474","445,828","449,480","453,623","454,060","450,411","456,181","457,567","462,855","484,171","505,328","523,838","532,933"
Collectors,"145,128","162,377","167,770","165,288","176,137","179,653","183,353","185,032","186,923","188,850","187,533","186,334","188,570","189,538","190,843","207,356","217,650","225,548","231,853"
Local,"867,986","951,018","1,041,136","1,052,278","1,097,120","1,119,552","1,129,218","1,137,870","1,149,456","1,167,946","1,177,009","1,185,948","1,196,840","1,245,479","1,277,631","1,337,532","1,393,251","1,427,988","1,455,872"
"Rural, total","6,526,929","6,475,655","6,380,585","6,405,041","6,365,359","6,328,421","6,317,137","6,318,146","6,321,005","6,359,761","6,269,250","6,281,997","6,308,742","6,284,800","6,288,735","6,206,471","6,139,666","6,108,358","6,111,987"
Interstates,"130,980","131,907","135,871","136,503","133,467","132,138","131,266","131,916","132,963","133,165","133,231","134,198","134,587","134,638","134,570","130,384","127,889","125,564","124,380"
Other arterialsb,"507,098","510,005","517,342","517,813","526,714","525,906","529,818","530,706","532,856","536,989","537,993","539,293","540,457","542,337","544,011","534,278","532,045","529,555","525,686"
Collectorsc,"1,431,267","1,466,789","1,467,602","1,467,561","1,441,466","1,434,473","1,432,189","1,417,428","1,416,662","1,418,637","1,415,774","1,413,953","1,414,667","1,414,155","1,408,752","1,388,515","1,380,712","1,373,348","1,372,906"
Local,"4,457,584","4,366,954","4,259,770","4,283,164","4,263,712","4,235,904","4,223,864","4,238,096","4,238,524","4,270,970","4,182,252","4,194,553","4,219,031","4,193,670","4,201,402","4,153,294","4,099,020","4,079,891","4,089,015"
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a  Includes the 50 States and the District of Columbia.,,,,,,,,,,,,,,,,,,,
"b  For urban: the sum of other freeways and expressways, other principal arterials, and minor arterials.  For rural: the sum of other principal arterials and minor arterials.",,,,,,,,,,,,,,,,,,,
c  Includes minor and major collectors. ,,,,,,,,,,,,
"d  Beginning in 1998, approximately 138,400 lane-miles of Bureau of Land Management roads are excluded.",,,,,,,,,,,,
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NOTE,,,,,,,,,,,,
"In estimating rural and urban lane mileage, the U.S. Department of Transportation, Federal Highway Administration assumes that rural minor collectors and urban/rural local roads are two lanes wide.",,,,,,,,,,,,
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SOURCES,,,,,,,,,,,,
"1980-95:  U.S. Department of Transportation, Federal Highway Administration, Office of Highway Information Management, table HM-260 (unpublished).",,,,,,,,,,,,
"1996-2006: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics (Washington, DC: Annual issues), table HM-60, Internet site www.fhwa.dot.gov/policy/ohpi as of Jan. 4, 2008. ",,,,,,,,,,,,