Table 1-3: Idaho Road Condition by Functional System -- Rural

Table 1-3: Idaho Road Condition by Functional System -- Rural

(Miles)

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  1995 1996 1997 1998 1999 2000
Interstate (total reported) 532 532 529 526 526 526
Very good 8 171 168 168 220 189
Good 166 273 271 257 198 233
Fair 151 39 69 83 94 84
Mediocre 182 32 13 10 6 12
Poor 25 17 8 8 8 8
Not reported 0 0 0 0 0 0
Other principal arterial (total reported) 1,683 1,684 1,678 1,673 1,669 1,687
Very good 0 421 225 276 269 215
Good 34 613 641 654 665 846
Fair 1,187 613 780 727 714 609
Mediocre 448 35 24 13 19 14
Poor 14 2 8 3 2 3
Not reported 0 0 2 1 0 0
Minor arterial (total reported) 1,200 1,296 1,294 1,305 1,304 1,283
Very good 0 285 155 180 257 178
Good 19 387 388 424 441 585
Fair 703 604 706 662 576 506
Mediocre 414 20 33 24 17 3
Poor 64 0 12 15 13 11
Not reported 0 0 0 4 0 0
Major collector (total reported) N N N N N 1,410
Very good N N N N N 141
Good N N N N N 486
Fair N N N N N 505
Mediocre N N N N N 44
Poor N N N N N 234
Not reported N N N N N N

KEY: N = data do not exist.

NOTE: In 2000, the Federal Highway Administration began reporting road condition for rural major collectors using the International Roughness Index, if available. In prior years, data were only available using the Present Serviceability Rating.

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.