Figure 1-1: Rural Road Conditions in Washington: 2000

Figure 1-1: Rural Road Conditions in Washington: 2000

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(Miles)

  Interstate Other Principal Arterial Minor Arterial Major Collector
Total 500 2,081 1,924 4389
Very good 210 328 131 136
Good 220 1,293 933 1,417
Fair 49 450 806 2,787
Mediocre 19 8 25 0
Poor 2 2 29 49

(Percent)

  Interstate Other principal arterial Minor arterial Major collector
Total 100 100 100 100
Very good 42 16 7 3
Good 44 62 48 32
Fair 10 22 42 63
Mediocre 4 0 1 0
Poor 0 0 2 1

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.