Table 1-6,,,,,,,,,,,,
Estimated U.S. Roadway Lane-Miles by Functional System,,,,,,,,,,,,
,1980,1985,1990,1991,1992,1993,1994,1995,1996,1997R,1998R,1999
Urban,,,,,,,,,,,,
Interstates,"48,458","57,295","62,214","62,826","67,266","69,184","70,832","71,377","71,790","R72,966","73,729","74,038"
Other arterials,"333,673","371,649","399,376","402,360","418,208","435,386","442,474","445,828","449,480","R455,872","456,333","452,627"
Collectors,"145,128","162,377","167,770","165,288","176,137","179,653","183,353","185,032","186,923","R190,153","188,852","187,612"
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","R1,178,928","1,188,015","1,197,026"
    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","R1,897,919","1,906,924","1,911,303"
,,,,,,,,,,,,
Rural,,,,,,,,,,,,
Interstates,"130,980","131,907","135,871","136,503","133,467","132,138","131,266","131,916","132,963","R133,165","133,640","134,611"
Other arterials,"507,098","510,005","517,342","517,813","526,714","525,906","529,818","530,706","532,856","R537,870","538,875","540,208"
Collectorsa,"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","R1,421,568","1,418,733","1,416,962"
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","R4,282,216","4,193,555","4,205,960"
    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","R6,375,228","6,284,803","6,297,741"
,,,,,,,,,,,,
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","R8,273,147","8,191,732","8,209,044"
"a Includes the 50 States, the District of Columbia, and Puerto Rico",,,,,,,,,,,,
b Includes minor and major collectors. ,,,,,,,,,,,,
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KEY: R = revised,,,,,,,,,,,,
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"NOTE: In estimating rural and urban lane mileage, the U.S. Department of Transportation, Federal Highway Administration",,,,,,,,,,,,
assumed 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: Ibid. Highway Statistics (Washington, DC: Annual issues), table HM-60.",,,,,,,,,,,,
"1997-99: Ibid. Internet site www.fhwa.dot.gov/ohim.ohimstat.htm, as of Nov. 15,2000",,,,,,,,,,,,