Figure 1-2: Urban Road Conditions in Illinois: 2000
Tuesday, January 3, 2012
Figure 1-2: Urban Road Conditions in Illinois: 2000
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(Miles)
| Interstate | Other Freeways & Expressways | Other Principal Arterial | Urban Minor Arterial | Urban Collector | |
|---|---|---|---|---|---|
| Total | 649 | 85 | 2,581 | 298 | 154 |
| Very good | 11 | 0 | 87 | 223 | 152 |
| Good | 218 | 4 | 666 | 0 | 0 |
| Fair | 222 | 48 | 1,329 | 17 | 2 |
| Mediocre | 157 | 25 | 371 | 17 | 0 |
| Poor | 41 | 8 | 128 | 41 | 0 |
(Percent)
| Interstate | Other freeways and expressways | Other principal arterial | Urban minor arterial | Urban collector | |
|---|---|---|---|---|---|
| Total | 100 | 100 | 100 | 100 | 100 |
| Very good | 2 | 0 | 3 | 75 | 99 |
| Good | 34 | 5 | 26 | 0 | 0 |
| Fair | 34 | 56 | 51 | 6 | 1 |
| Mediocre | 24 | 29 | 14 | 6 | 0 |
| Poor | 6 | 9 | 5 | 14 | 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.