List of Interstate Highways in Illinois
| Interstate Highway System in Illinois | |
|---|---|
|
Standard Illinois Interstate Highway markers | |
| System information | |
| Maintained by IDOT, ISTHA, and SCC | |
| Length: | 2,248.93 mi[1] (3,619.30 km) |
| Formed: | June 29, 1956[2] |
| Highway names | |
| Interstates: | Interstate X (I-X) |
| US Routes: | U.S. Route X (US X) |
| State: | Illinois Route X (IL X) |
| System links | |
The Interstate Highways in Illinois are all segments of the Interstate Highway System that are owned and maintained by the U.S. state of Illinois.[3] The Illinois Department of Transportation (IDOT) is responsible for maintaining these highways in Illinois. The Interstate Highway System in Illinois consists of 13 primary highways and 11 auxiliary highways which cover 2,248.93 miles (3,619.30 km).[1] The Interstate Highway with the longest section in Illinois is Interstate 57 at 358.57 miles (577.06 km); the shortest is Interstate 41 at 0.90 miles (1.45 km).
Primary Interstate Highways
| Number | Length (mi)[1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
|---|---|---|---|---|---|---|---|
 I-24 |
38.73 | 62.33 | I-57 in Williamson County | I-24 at Metropolis | 1977 | current | |
 I-39 |
123.42 | 198.63 | I-55 in Normal | I-39 / I-90 in South Beloit | 1989 | current | |
 I-41 |
0.90 | 1.45 | I-94 / US 41 in Russell | I-41 / I-94 near Russell | 2015[4] | current | Overlaps I-94 from the US 41 split north to the state line |
 I-55 |
313.08 | 503.85 | I-55 / I-64 in East St. Louis | US 41 (Lake Shore Drive) in Chicago | 1960 | current | |
 I-57 |
364.16 | 586.06 | I-57 near Cairo | I-94 in Chicago | 1969 | current | |
 I-64 |
128.12 | 206.19 | I-55 / I-64 in East St. Louis | I-64 in Grayville | 1974 | current | |
 I-70 |
135.74 | 218.45 | I-70 in East St. Louis | I-70 in Clark County | — | — | |
 I-72 |
177.25 | 285.26 | I-72 / US 36 in Pike County | I-57 in Champaign | 1970 | current | |
 I-74 |
220.34 | 354.60 | I-74 / US 6 in Moline | I-74 in Danville | — | — | |
 I-80 |
163.52 | 263.16 | I-80 in Rock Island County | I-80 / I-94 in Lansing | 1967 | current | |
 I-88 |
140.60 | 226.27 | I-80 in Silvis | I-290 in Hillside | 1987 | current | |
 I-90 |
123.89 | 199.38 | I-39 / I-90 in South Beloit | I-90 in Chicago | — | — | |
 I-94 |
61.53 | 99.02 | I-94 / US 41 near Russell | I-80 / I-94 in Lansing | — | — |
Auxiliary Interstate Highways
| Number | Length (mi)[1] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
|---|---|---|---|---|---|---|---|
 I-155 |
32.13 | 51.71 | I-55 in Logan County | I-74 in Morton | 1992 | current | |
 I-172 |
19.69 | 31.69 | I-72 in Fall Creek | US 24 in Fowler | 1995 | current | |
 I-180 |
13.19 | 21.23 | IL 71 in Hennepin | I-80 in Bureau County | — | — | |
 I-190 |
3.07 | 4.94 | O'Hare International Airport | I-90 in Chicago | — | — | |
 I-255 |
27.05 | 43.53 | I-255 in Columbia | I-270 / IL 255 in Pontoon Beach | — | — | |
 I-270 |
14.97 | 24.09 | I-270 in Madison County | I-70 in Troy | — | — | |
 I-280 |
17.60 | 28.32 | I-280 in Rock Island | I-74 / I-80 in Colona | — | — | |
 I-290 |
29.84 | 48.02 | I-90 in Schaumburg | I-90 / I-94 in Chicago | — | — | |
 I-294 |
53.42 | 85.97 | I-94 in Northbrook | I-80 / I-94 in South Holland | — | — | |
 I-355 |
32.51 | 52.32 | I-80 in New Lenox | I-290 in Itasca | 1989 | current | |
 I-474 |
14.88 | 23.95 | I-74 / IL 6 in Peoria | I-74 in Tazewell County | — | — |
Business loops
| Number | Length (mi) | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes |
|---|---|---|---|---|---|---|---|
 I-55 Bus. |
13.9 | 22.4 | I-55 / I-72 / US 36 in Springfield | I-55 in Williams Township | — | — | |
| I-55 Bus. |
— | — | — | — | — | — | |
| I-55 Bus. |
— | — | — | — | — | — | |
 I-72 Bus. |
9.5 | 15.3 | I-72 / US 36 / US 67 southwest of Jacksonville | I-72 in Jacksonville | — | — |
See also
- Illinois portal
- U.S. Roads portal
References
- 1 2 3 4 Adderly, Kevin (January 15, 2014). "Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico". Route Log and Finder List. Federal Highway Administration. Retrieved April 7, 2015.
- ↑ McNichol, Dan (2006). The Roads that Built America. New York: Sterling. p. 106. ISBN 1-4027-3468-9.
- ↑ Staff. "Interstate Frequently Asked Questions". Federal Highway Administration. Retrieved February 25, 2008.
- ↑ Srubas, Paul (April 9, 2015). "US 41 Named Officially to Interstate Highway System". Green Bay Press Gazette.
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