Table 1-4: Iowa Road Condition by Functional System -- Rural

Table 1-4: Iowa Road Condition by Functional System -- Rural

(Miles)

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  1995 1996 1997 1998 1999 2000
Interstate (total reported) 618 633 625 635 633 635
Very good 26 34 50 61 101 67
Good 258 238 331 323 308 281
Fair 192 234 179 203 190 164
Mediocre 139 122 65 47 33 123
Poor 3 5 0 1 1 0
Not reported 16 1 9 0 1 0
Other principal arterial (total reported) 3,147 3,248 3,279 3,298 3,272 3,345
Very good 174 226 202 322 443 369
Good 802 841 994 1,125 1,065 1,142
Fair 1,866 1,809 1,676 1,467 1,413 1,470
Mediocre 298 370 354 315 286 324
Poor 7 2 53 69 65 40
Not reported 258 165 139 131 187 142
Minor arterial (total reported) 3,601 3,727 3,713 3,569 3,571 3,584
Very good 152 406 317 554 528 817
Good 766 691 805 830 839 760
Fair 2,033 2,069 1,938 1,585 1,586 1,424
Mediocre 592 504 538 481 489 444
Poor 58 57 115 119 129 139
Not reported 353 226 241 386 384 373
Major collector (total reported) N N N N N 911
Very good N N N N N 84
Good N N N N N 227
Fair N N N N N 442
Mediocre N N N N N 55
Poor N N N N N 103
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.