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

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

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(Miles)

  Interstate Other principal arterial Minor arterial Major collector
Total 742 2,749 4,113 N
Very good 67 470 878 N
Good 257 1,117 1,666 N
Fair 185 1,022 1,406 N
Mediocre 185 107 96 N
Poor 48 33 67 N

(Percent)

  Interstate Other principal arterial Minor arterial Major collector
Total 100 100 100 N
Very good 9 17 21 N
Good 35 41 41 N
Fair 25 37 34 N
Mediocre 25 4 2 N
Poor 6 1 2 N

NOTE: Numbers may not add to 100 due to rounding.

KEY FOR DATA ON THIS PAGE: N = data do not exist.

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.