BTS | Table 1-5: Illinois Road Condition by Functional System -- Rural

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BTS Home > Publications > State Transportation Statistics > Illinois

Table 1-5: Illinois Road Condition by Functional System -- Rural

(Miles)

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	1995	1996	1997	1998	1999	2000
Interstate (total reported)	1,528	1,521	1,518	N	1,514	1,515
Very good	69	55	58	N	43	99
Good	380	554	553	N	549	798
Fair	498	414	435	N	469	330
Mediocre	530	468	448	N	441	280
Poor	51	30	24	N	12	8
Not reported	0	0	0	1,518	0	0
Other principal arterial (total reported)	2,634	2,638	2,625	N	2,624	2,613
Very good	45	57	34	N	74	94
Good	538	636	673	N	856	911
Fair	1,713	1,579	1,551	N	1,460	1,389
Mediocre	285	313	286	N	201	187
Poor	53	53	81	N	33	32
Not reported	0	0	0	2,631	0	0
Minor arterial (total reported)	4,822	4,814	4,832	N	4,828	4,822
Very good	429	408	303	N	794	403
Good	1,188	1,023	1,232	N	878	1,167
Fair	2,528	2,753	2,490	N	2,709	2,825
Mediocre	510	411	594	N	302	217
Poor	167	219	213	N	145	210
Not reported	0	0	0	4,830	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	933

KEY: N = data do not exist.

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.

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.