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

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

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(Miles)

  Interstate Other Principal Arterial Minor Arterial Major Collector
Total 635 3,345 3,584 911
Very good 67 369 817 84
Good 281 1,142 760 227
Fair 164 1,470 1,424 442
Mediocre 123 324 444 55
Poor 0 40 139 103

(Percent)

  Interstate Other Principal Arterial Minor Arterial Major Collector
Total 100 100 100 100
Very good 11 11 23 9
Good 44 34 21 25
Fair 26 44 40 49
Mediocre 19 10 12 6
Poor 0 1 4 11

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.