Figure 1-1: Urban Road Conditions in the District of Columbia: 2000

Figure 1-1: Urban Road Conditions in the District of Columbia: 2000

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(Miles)

  Interstate Other freeways and expressways Other principal arterial Urban minor arterial Urban collector
Total 13 18 87 N N
Very good 0 0 0 N N
Good 3 0 0 N N
Fair 2 7 7 N N
Mediocre 1 5 22 N N
Poor 7 6 58 N N

(Percent)

  Interstate Other freeways and expressways Other principal arterial Urban minor arterial Urban collector
Total 100 100 100 N N
Very good 0 0 0 N N
Good 23 0 0 N N
Fair 15 39 8 N N
Mediocre 8 28 25 N N
Poor 54 33 67 N N

KEY FOR DATA ON THIS PAGE: N = data do not exist.

NOTE: Numbers may not add to 100 due to rounding.

NOTE FOR DATA ON THIS PAGE: Road condition is based on measured pavement roughness using the International Roughness Index (IRI). IRI is a measure of surface condition. A comprehensive measure of pavement condition would require data on other pavement distresses such as rutting, cracking, and faulting.

SOURCE FOR DATA ON THIS PAGE: U.S. Department of Transportation, Federal Highway Administration, Highway Statistics, Washington, DC: annual editions, tables HM-63 and HM-64, available at http://www.fhwa.dot.gov/ as of Feb. 1, 2002.