Illinois Route 203

Illinois Route 203 (IL 203) is a 9.51-mile-long (15.30 km) north–south state highway in the southwestern part of the U.S. state of Illinois. It travels from just south of I-55/I-70/US 40 around Gateway International Raceway at Collinsville Road (former US 40) in Fairmont City, north to I-270 near Pontoon Beach. IL 203 is a former segment of US 66.

"Illinois 203" redirects here. For other uses, see Illinois 203 (disambiguation).

Illinois Route 203 marker

Illinois Route 203

Nameoki Road
IL 203 highlighted in red
Route information
Maintained by IDOT
Length9.51 mi[1] (15.30 km)
Existed1964[2]–present
Major junctions
South endCollinsville Road in Fairmont City
Major intersections I-55 / I-70 / US 40 in Fairmont City
North end I-270 in Granite City
Location
CountryUnited States
StateIllinois
CountiesSt. Clair, Madison
Highway system
← IL 192→ IL 242

Route description
Exit for IL 203 off of I-70 and I-55

IL 203 is a major north–south artery through the eastern part of the Greater St. Louis metropolitan area.

History

By 1937, US 67 was signed on part of present-day IL 203.[3] From 1938 to 1955, US 66 City was signed on this particular route as well.[4][5] By 1939, US 67 Alternate was signed after US 67 was rerouted away from East St. Louis.[6] Up until 1964, parts of IL 3, IL 162, and US 67 Alternate utilized present-day IL 203.[7] In 1964, IL 203 was signed; replacing these routes. It originally traveled to Hartford, but this was later trimmed back to I-270 as of 1989.[2][8]

Major intersections
CountyLocationmi[9]kmDestinationsNotes
St. ClairFairmont City0.00.0Collinsville RoadSouthern terminus
0.30.48 I-55 / I-70 / US 40 – Chicago, St. LouisExit 4 (I-70/I-55)
MadisonGranite City5.08.0
 IL 162 east (Edwardsville Road)		Western terminus of IL 162
Mitchell9.515.3 I-270 / Historic US 66 – Effingham, St. CharlesNorthern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References
  1. Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08.
  2. Carlson, Rich (2005-04-15). "Illinois Highways Page: Routes 203 thru end]". Retrieved 2006-06-27.
  3. "1937 Missouri Highway Map". Retrieved 15 June 2020.
  4. "1938 Missouri Highway Map". Retrieved 15 June 2020.
  5. Illinois Division of Highways (1955). Illinois Official Highway Map (Map). [1:805,000]. Springfield: Illinois Division of Highways – via Illinois Digital Archives.
  6. "1939 Missouri Highway Map". Retrieved 15 June 2020.
  7. Illinois Division of Highways; H.M. Gousha (1963). Illinois Official Highway Map (Map). [1:790,00]. Springfield: Illinois Division of Highways – via Illinois Digital Archives.
  8. Illinois Department of Transportation (1989). Illinois Highway Map (Map) (1989–1990 ed.). [1:762,500]. Springfield: Illinois Department of Transportation – via Illinois Digital Archives.
  9. Google (July 9, 2012). "Illinois Route 203" (Map). Google Maps. Google. Retrieved July 9, 2012.
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