Table 1-4: Michigan Road Condition by Functional System -- Rural (Miles)

Table 1-4: Michigan Road Condition by Functional System -- Rural (Miles)

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  1995 1996 1997 1998 1999 2000
Interstate (total reported) 740 740 739 742 741 742
Very good 89 70 70 35 67 67
Good 280 287 286 257 257 257
Fair 207 186 186 172 187 185
Mediocre 142 165 165 212 182 185
Poor 22 32 32 66 48 48
Not reported 0 0 0 0 0 0
Other principal arterial (total reported) 2,739 2,743 2,743 2,744 2,750 2,749
Very good 360 251 248 330 470 470
Good 1,160 1,203 1,218 1,046 1,128 1,117
Fair 1,129 1,145 1,136 1,191 1,013 1,022
Mediocre 77 122 120 141 104 107
Poor 13 22 21 36 35 33
Not reported 14 12 12 18 12 15
Minor arterial (total reported) 3,973 4,024 4,026 4,081 4,072 4,113
Very good 347 363 397 851 867 878
Good 1,619 1,681 1,893 1,658 1,666 1,666
Fair 1,577 1,580 1,483 1,411 1,385 1,406
Mediocre 388 308 216 96 87 96
Poor 42 92 37 65 67 67
Not reported 26 0 0 0 0 0
Major collector (total reported) N N N N N N
Very good N N N N N N
Good N N N N N N
Fair N N N N N N
Mediocre N N N N N N
Poor N N N N N N
Not reported N N N N N N

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.

KEY: 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.