Illinois Route 18

Illinois Route 18 (IL 18) is a rural east–west state route in central Illinois. It runs east from the town of Henry at Illinois Route 29 to the town of Blackstone at Illinois Route 17. This is a distance of 39.01 miles (62.78 km).[1]

Illinois Route 18 marker

Illinois Route 18

North 13th Road
IL 18 highlighted in red
Route information
Maintained by IDOT
Length39.01 mi[1] (62.78 km)
Existed1939[2]–present
Major junctions
West end IL 29 in Henry
Major intersections I-39 / US 51 in Lostant
East end IL 17 in Blackstone
Location
CountryUnited States
StateIllinois
CountiesStark, Marshall, Putnam, LaSalle, Livingston
Highway system
← IL 17→ IL 19

Route description
IL 18 crosses over the Illinois River at Henry, Illinois

Illinois 18 crosses the Illinois River at Henry, and is the first river crossing south of Interstate 180. The terrain is generally flat outside of the Illinois River Valley area. In Streator, Illinois 18 westbound becomes Main Street. Eastbound, it becomes Bridge Street. Illinois 18 is also known as North 13th Road and East 24th Road in LaSalle County.

History

From 1918 through 1935, SBI Route 18 ran from Chicago to Princeton using what used to be part of U.S. Route 32.[3] Since then, IL 18 as well as part of US 32 were superseded by US 34.[4] In 1939, it was applied to what was then SBI Routes 89B and 89C as well as part of SBI Route 17.[5][6] The next year, the route was completed and Illinois 17 moved to a new highway south of Streator.[7][2]

Major intersections
CountyLocationmi[8]kmDestinationsNotes
StarkHenry0.00.0 IL 29 (University Street)
Illinois River1.21.9Henry Bridge
Marshall​2.13.4
 IL 26 south		West end of IL 26 overlap
Putnam​2.84.5
 IL 26 north		East end of IL 26 overlap
Magnolia9.915.9 IL 89
LaSalle​16.526.6 I-39 / US 51 – Bloomington-Normal, RockfordI-39 exit 41
​17.027.4 IL 251
Streator29.146.8 IL 23 (Bloomington Street, Park Street)
Livingston​39.0162.78
 IL 17 to I-55
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References
  1. Illinois Technology Transfer Center (2007). "T2 GIS Data". Retrieved November 8, 2007.
  2. Carlson, Rick. Illinois Highways Page: Routes 1 thru 20. Last updated March 15, 2005. Retrieved March 31, 2006.
  3. Illinois Secretary of State; Rand McNally (1934). Official Road Map Illinois (Map). [c. 1:950,000 and c. 1:1,110,000]. Springfield: Illinois Secretary of State. OCLC 183709045. Retrieved November 3, 2020 – via Illinois Digital Archives.
  4. Illinois Secretary of State; H.M. Gousha (1935). Official Road Map Illinois (Map). [c. 1:950,000 and c. 1:1,110,000]. Springfield: Illinois Secretary of State. Retrieved November 3, 2020 – via Illinois Digital Archives.
  5. Illinois Secretary of State; Rand McNally (1936). Road Map Illinois (Map). [c. 1:950,000 and c. 1:1,110,000]. Springfield: Illinois Secretary of State. Retrieved November 3, 2020 – via Illinois Digital Archives.
  6. Illinois Secretary of State; Rand McNally (1939). Illinois Road Map (Map) (1939–1940 ed.). c. 1:918,720. Springfield: Illinois Secretary of State. Retrieved November 3, 2020 – via Illinois Digital Archives.
  7. Illinois Secretary of State; Rand McNally (1940). Illinois Road Map (Map). c. 1:918,720. Springfield: Illinois Secretary of State. Retrieved November 3, 2020 – via Illinois Digital Archives.
  8. Google Maps,
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