Table 1-6M: Estimated U.S. Roadway Lane-Kilometers by Functional Systema

Table 1-6M: Estimated U.S. Roadway Lane-Kilometers by Functional Systema

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  1980 1985 1990 1991 1992 1993 1994 1995 1996 1997 R,d1998 R1999 2000
TOTAL lane-kilometers12,749,503 12,903,711 12,956,959 13,016,041 13,074,455 13,087,501 13,104,911 13,129,436 13,162,268 R13,264,917 13,133,628 13,161,180 13,234,268
Urban                         
Interstates 77,986 92,207 100,124 101,109 108,254 111,341 113,993 114,870 115,535 R116,286 117,492 117,957 118,955
Other arterialsb 536,995 598,111 642,733 647,536 673,041 700,686 712,093 717,491 723,368 R730,035 730,739 724,741 733,631
Collectors 233,561 261,320 270,000 266,005 283,465 289,123 295,078 297,780 300,823 R303,925 301,805 299,898 303,471
Local 1,396,888 1,530,515 1,675,546 1,693,477 1,765,643 1,801,744 1,817,300 1,831,224 1,849,870 R1,879,627 1,894,212 1,908,606 1,926,127
Total 2,245,429 2,482,154 2,688,403 2,708,127 2,830,403 2,902,894 2,938,464 2,961,365 2,989,596 R3,029,873 3,044,248 3,051,202 3,082,183
Rural                         
Interstates 210,792 212,284 218,663 219,680 214,794 212,655 211,252 212,298 213,983 214,308 214,415 215,974 216,597
Other arterialsb 816,095 820,773 832,581 833,339 847,664 846,364 852,659 854,089 857,549 R864,200 865,816 867,977 868,914
Collectorsc 2,303,401 2,360,568 2,361,876 2,361,810 2,319,815 2,308,561 2,304,885 2,281,129 2,279,896 R2,283,075 2,278,467 2,275,643 2,276,683
Local 7,173,786 7,027,931 6,855,435 6,893,084 6,861,779 6,817,027 6,797,650 6,820,554 6,821,243 R6,873,460 6,730,682 6,750,384 6,789,892
Total 10,504,074 10,421,557 10,268,556 10,307,914 10,244,052 10,184,606 10,166,447 10,168,070 10,172,671 R10,235,043 10,089,380 10,109,978 16,338,197

KEY: R = revised.

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-kilometers of Bureau of Land Management roads are excluded.

NOTES: In estimating rural and urban lane kilometers, the U.S. Department of Transportation, Federal Highway Administration assumed that rural minor collectors and urban/rural local roads are two lanes wide.

Numbers may differ slightly from previous year's metric tables because a higher precision conversion factor was used.

SOURCES: 1980-95: U.S. Department of Transportation, Federal Highway Administration, Office of Highway Information Management, table HM-260 (unpublished).

1996-2000: Ibid., Highway Statistics (Washington, DC: Annual issues), table HM-60. Internet address www.fhwa.dot.gov/ohim.ohimstat.htm as of Dec. 27, 2001.