Figure 1-2: Urban Road Conditions in Iowa: 2000

Figure 1-2: Urban Road Conditions in Iowa: 2000

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(Miles)

  Interstate Other Freeways & Expressways Other Principal Arterial Urban Minor Arterial Urban Collector
Total 147 0 631 85 5
Very good 4 0 17 4 2
Good 44 0 134 19 1
Fair 36 0 290 39 0
Mediocre 47 0 93 13 2
Poor 16 0 97 10 0

(Percent)

  Interstate Other Freeways & Expressways Other Principal Arterial Urban Minor Arterial Urban Collector
Total 100 0 100 100 100
Very good 3 0 3 5 40
Good 30 0 21 22 20
Fair 24 0 46 46 0
Mediocre 32 0 15 15 40
Poor 11 0 15 12 0

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.