Figure 1-2: Urban Road Conditions in Washington: 2000

Figure 1-2: Urban Road Conditions in Washington: 2000

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(Miles)

  Interstate Other Freeways & Expressways Other Principal Arterial Urban Minor Arterial Urban Collector
Total 261 309 293 298 36
Very good 63 30 23 8 0
Good 112 155 96 153 0
Fair 26 53 137 125 34
Mediocre 51 52 19 1 2
Poor 9 19 18 11 0

(Percent)

  Interstate Other freeways and expressways Other principal arterial Urban minor arterial Urban collector
Total 100 100 100 100 100
Very good 24 10 8 3 0
Good 43 50 33 51 0
Fair 10 17 47 42 94
Mediocre 20 17 6 0 6
Poor 3 6 6 4 0

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.