List of Interstate Highways in Illinois

Interstate Highway System in Illinois

Interstate 39 marker Interstate 255 marker Interstate 72 Business marker

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 (1956-06-29)[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 38.7362.33 I-57 in Williamson CountyI-24 at Metropolis 1977current
I-39 123.42198.63 I-55 in NormalI-39 / I-90 in South Beloit 1989current
I-41 0.901.45 I-94 / US 41 in RussellI-41 / I-94 near Russell 2015[4]current Overlaps I-94 from the US 41 split north to the state line
I-55 313.08503.85 I-55 / I-64 in East St. LouisUS 41 (Lake Shore Drive) in Chicago 1960current
I-57 364.16586.06 I-57 near CairoI-94 in Chicago 1969current
I-64 128.12206.19 I-55 / I-64 in East St. LouisI-64 in Grayville 1974current
I-70 135.74218.45 I-70 in East St. LouisI-70 in Clark County
I-72 177.25285.26 I-72 / US 36 in Pike CountyI-57 in Champaign 1970current
I-74 220.34354.60 I-74 / US 6 in MolineI-74 in Danville
I-80 163.52263.16 I-80 in Rock Island CountyI-80 / I-94 in Lansing 1967current
I-88 140.60226.27 I-80 in SilvisI-290 in Hillside 1987current
I-90 123.89199.38 I-39 / I-90 in South BeloitI-90 in Chicago
I-94 61.5399.02 I-94 / US 41 near RussellI-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 32.1351.71 I-55 in Logan CountyI-74 in Morton 1992current
I-172 19.6931.69 I-72 in Fall CreekUS 24 in Fowler 1995current
I-180 13.1921.23 IL 71 in HennepinI-80 in Bureau County
I-190 3.074.94 O'Hare International AirportI-90 in Chicago
I-255 27.0543.53 I-255 in ColumbiaI-270 / IL 255 in Pontoon Beach
I-270 14.9724.09 I-270 in Madison CountyI-70 in Troy
I-280 17.6028.32 I-280 in Rock IslandI-74 / I-80 in Colona
I-290 29.8448.02 I-90 in SchaumburgI-90 / I-94 in Chicago
I-294 53.4285.97 I-94 in NorthbrookI-80 / I-94 in South Holland
I-355 32.5152.32 I-80 in New LenoxI-290 in Itasca 1989current
I-474 14.8823.95 I-74 / IL 6 in PeoriaI-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. 13.922.4 I-55 / I-72 / US 36 in SpringfieldI-55 in Williams Township
I-55 Bus.
I-55 Bus.
I-72 Bus. 9.515.3 I-72 / US 36 / US 67 southwest of JacksonvilleI-72 in Jacksonville

See also

References

  1. 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.
  2. McNichol, Dan (2006). The Roads that Built America. New York: Sterling. p. 106. ISBN 1-4027-3468-9.
  3. Staff. "Interstate Frequently Asked Questions". Federal Highway Administration. Retrieved February 25, 2008.
  4. Srubas, Paul (April 9, 2015). "US 41 Named Officially to Interstate Highway System". Green Bay Press Gazette.
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