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

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

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(Miles)

  Interstate Other Principal Arterial Minor Arterial Major Collector
Total 526 1,687 1,283 1,410
Very good 189 215 178 141
Good 233 846 585 486
Fair 84 609 506 505
Mediocre 12 14 3 44
Poor 8 3 11 234

(Percent)

  Interstate Other principal arterial Minor arterial Major collector
Total 100 100 100 100
Very good 36 13 14 10
Good 44 50 46 34
Fair 16 36 39 36
Mediocre 2 1 0 3
Poor 2 0 1 17

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.