Table 1-6. Estimated U.S. Roadway Lane-Miles by Functional System

Table 1-6. Estimated U.S. Roadway Lane-Miles by Functional System

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  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-miles7,922,174 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.

KEY: R = revised

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. 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Department of Transportation, Federal Highway Administration, Office of Highway Information Management, table HM-260 (unpublished). 1996: Ibid.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