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Highway Statistics Series

Highway Statistics 1998


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FEDERAL-AID HIGHWAY LENGTH – 1998 1/

MILES BY TRAFFIC LANES AND ACCESS CONTROL

OCTOBER 1999
TABLE HM-36

TRAFFIC LANES AND ACCESS CONTROL NATIONAL HIGHWAY SYSTEM OTHER FEDERAL - AID HIGHWAYS 2/ ALL FEDERAL-AID HIGHWAYS 2/
INTERSTATE OTHER TOTAL
MILES PERCENT MILES PERCENT MILES PERCENT MILES PERCENT MILES PERCENT
Rural:
One-way streets 2 0.0 104 0.1 106 0.1 346 0.1 452 0.1
2 lanes 998 3.0 59,750 69.8 60,748 51.3 568,560 97.7 629,309 89.8
3 lanes 19 0.1 1,736 2.0 1,755 1.5 1,315 0.2 3,069 0.4
4 or more lanes: 22 0.1 4,063 4.7 4,085 3.4 4,568 0.8 8,653 1.2
Divided highways - 4 or more lanes: 3/
Degree of access control:
None 17 0.1 9,667 11.3 9,684 8.2 5,890 1.0 15,574 2.2
Partial 42 0.1 5,450 6.4 5,492 4.6 1,196 0.2 6,688 1.0
Full 31,812 96.7 4,846 5.7 36,657 30.9 217 0.0 36,875 5.3
Total Rural 32,912 100.0 85,615 100.0 118,527 100.0 582,092 100.0 700,619 100.0
Small urban area:
One-way streets 0 0.0 133 2.2 133 1.7 598 1.2 731 1.3
2 lanes 3 0.2 1,959 32.8 1,962 25.4 40,870 84.0 42,832 76.0
3 lanes 0 0.0 98 1.6 98 1.3 432 0.9 492 0.9
4 or more lanes - undivided 0 0.0 1,269 21.2 1,269 16.4 4,353 8.9 5,622 10.0
Divided highways - 4 or more lanes:
Degree of access control:
None 1 0.0 1,052 17.6 1,052 13.6 1,899 3.9 2,996 5.3
Partial 11 0.6 775 13.0 786 10.2 430 0.9 1,217 2.2
Full 1,716 99.1 696 11.6 2,413 31.3 68 0.1 2,481 4.4
Total Small Urban Area 1,732 100.0 5,981 100.0 7,713 100.0 48,650 100.0 56,370 100.0
Urbanized Area:                    
One-way streets 6 0.1 512 2.3 519 1.5 4,219 2.6 4,738 2.4
2 lanes 13 0.1 4,385 19.8 4,397 13.0 113,812 70.2 118,827 60.5
3 lanes 13 0.1 213 1.0 225 0.7 1,577 1.0 1,803 0.9
4 or more lanes - undivided 3/ 25 0.2 4,322 19.5 4,347 12.8 21,838 13.5 26,186 13.3
Divided highways - 4 or more lanes:
Degree of access control:
None 23 0.2 4,841 21.8 4,864 14.4 16,907 10.4 21,770 11.1
Partial 32 0.3 2,642 11.9 2,674 7.9 3,008 1.9 5,682 2.9
Full 11,579 99.0 5,248 23.7 16,826 49.7 677 0.4 17,503 8.9
Total Urbanized Area 11,690 100.0 22,162 100.0 33,852 100.0 162,038 100.0 196,509 100.0
Total Urban:
One-way streets 6 0.0 645 2.3 652 1.6 4,817 2.3 5,469 2.2
2 lanes 16 0.1 6,344 22.5 6,360 15.3 154,681 73.4 161,659 63.9
3 lanes 13 0.1 310 1.1 323 0.8 2,009 1.0 2,295 0.9
4 or more lanes - undivided 25 0.2 5,591 19.9 5,616 13.5 26,191 12.4 31,807 12.6
Divided highways - 4 or more lanes:
Degree of access control:
None 23 0.2 5,893 20.9 5,916 14.2 18,805 8.9 24,766 9.8
Partial 43 0.3 3,417 12.1 3,460 8.3 3,439 1.6 6,899 2.7
Full 13,295 99.1 5,944 21.1 19,239 46.3 745 0.4 19,984 7.9
Total Urban 13,422 100.0 28,143 100.0 41,565 100.0 210,688 100.0 252,879 100.0
Total Rural and Urban 46,334 * 113,759 * 160,092 * 792,781 * 953,498 *

1/ Includes the 50 States, the District of Columbia, and Puerto Rico.

2/ Traffic lanes: Reflects the prevailing number of lanes (excluding parking and turning lanes) carrying through traffic during the off-peak period. Access Control: Full Access Control – preference has been given to through traffic movements by providing interchanges with selected public roads and by prohibiting direct driveway connections. Partial Access Control*preference has been given to through traffic movement. In addition to possible interchanges there may be some crossings at grade with public roads, but direct private driveway connections have been minimized.

3/ Although the Interstate System is part of the National Highway System, its mileage is shown separately.

4/ Some differences from other tables may be noted because these are estimated from sample data and do not include structures.