BTS | Table 1-6: Illinois Road Condition by Functional System -- Urban

Bureau of Transportation Statistics (BTS) - Research and Innovative Technology Administration (RITA) - United States Department of Transportation (USDOT, US DOT or DOT)

ABOUT RITA | CONTACT US | PRESS ROOM | CAREERS | SITE MAP

Data and Statistics

Bookstore

Programs

About BTS

Upcoming Press Releases

External Links

BTS Home > Publications > State Transportation Statistics > Illinois

Table 1-6: Illinois Road Condition by Functional System -- Urban

(Miles)

Excel | CSV

	1995	1996	1997	1998	1999	2000
Interstate (total reported)	635	642	646	N	649	649
Very good	38	30	33	N	40	11
Good	87	124	124	N	190	218
Fair	187	188	201	N	200	222
Mediocre	209	224	219	N	176	157
Poor	114	76	69	N	43	41
Not reported	0	0	0	647	1	1
Other freeways and expressways (total reported)	82	75	75	N	84	85
Very good	2	2	0	N	0	0
Good	13	13	12	N	10	4
Fair	30	15	19	N	39	48
Mediocre	20	29	33	N	28	25
Poor	17	16	11	N	7	8
Not reported	0	0	0	82	0	0
Other principal arterial (total reported)	2,593	2,602	2,606	N	2,559	2,581
Very good	30	24	41	N	85	87
Good	188	173	176	N	652	666
Fair	1,259	1,204	1,201	N	1,266	1,329
Mediocre	620	584	576	N	397	371
Poor	496	617	612	N	159	128
Not reported	0	0	0	2,603	50	44
Urban minor arterial (total reported)	N	N	N	N	N	298
Very good	N	N	N	N	N	223
Good	N	N	N	N	N	0
Fair	N	N	N	N	N	17
Mediocre	N	N	N	N	N	17
Poor	N	N	N	N	N	41
Not reported	N	N	N	N	N	N
Urban collector (total reported)	N	N	N	N	N	154
Very good	N	N	N	N	N	152
Good	N	N	N	N	N	0
Fair	N	N	N	N	N	2
Mediocre	N	N	N	N	N	0
Poor	N	N	N	N	N	0
Not reported	N	N	N	N	N	N

KEY: N = data do not exist.

NOTE: In 2000, the Federal Highway Administration began reporting road condition for urban minor arterials and urban 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.