Illinois Route 203
|Maintained by IDOT|
|Length:||9.51 mi (15.30 km)|
|Existed:||1964 – present|
|South end:||Collinsville Road in Fairmont City|
|I-55 / I-70 / US 40 in Fairmont City|
|North end:||I-270 in Granite City|
|Counties:||St. Clair, Madison|
Illinois Route 203 is a north–south state road in southwestern Illinois. It runs from just south of I-55, I-70, and U.S. 40 around Gateway International Raceway at Collinsville Road (former U.S. 40) in Fairmont City, north to I-270 near Pontoon Beach. This is a distance of 9.51 miles (15.30 km). Illinois 203 is a former segment of U.S. Highway 66.
Illinois 203 is a major north–south artery through the eastern metropolitan St. Louis area.
||Fairmont City||0.0||0.0||Collinsville Road|
|0.3||0.5||I-55 / I-70 (US 40) – Chicago, St. Louis|
||Granite City||5.0||8.0||IL 162 east (Edwardsville Road)|
|Mitchell||9.5||15.3||I-270 – Effingham, St. Charles|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi
- Carlson, Rich (2005-04-15). "Illinois Highways Page: Routes 203 thru end]". Retrieved 2006-06-27.
- Illinois Technology Transfer Center (2006). "T2 GIS Data". Retrieved 2007-11-08.
- Google Inc. Google Maps – Illinois Route 203 (Map). Cartography by Google, Inc. https://maps.google.com/maps?saddr=Collinsville+Rd&daddr=IL-203+N+to:Edwardsville+Rd+to:IL-203+N%2FNameoki+Rd&hl=en&sll=38.759509,-90.093818&sspn=0.002146,0.004619&geocode=FZKgTQIdqsSg-g%3BFR2uTQId07-g-g%3BFfl9TgIdK9ig-g%3BFfxrTwIdIUah-g&mra=mi&mrsp=3&sz=18&t=m&z=18. Retrieved July 9, 2012.
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