U.S. Route 12 in Illinois

U.S. Route 12 marker
U.S. Route 12
Iron Brigade Memorial Highway
Map
US 12 highlighted in red
Route information
Maintained by IDOT and CDOT
Length85.14 mi[1] (137.02 km)
Existed1928 (1928)[2]–present
Major junctions
West end US 12 near Richmond
Major intersections
East end US 12 / US 20 / US 41 in Chicago
Location
CountryUnited States
StateIllinois
CountiesMcHenry, Lake, Cook
Highway system
IL 10 IL 13

U.S. Route 12 (US 12) in the U.S. state of Illinois is an arterial highway that runs northwest to southeast through the Chicago metropolitan area. It enters Illinois at the Wisconsin border north of Richmond, and exits into Hammond, Indiana, from Chicago near the foot of the onramp to the Indiana Toll Road (Interstate 90, or I-90); as it exits Illinois, the route is also concurrent with US 20 and US 41. Within Illinois, US 12 runs for a distance of 85.14 miles (137.02 km).[1]

  1. ^ a b Illinois Technology Transfer Center (2007). "T2 GIS Data". Illinois Department of Transportation. Retrieved November 8, 2007.
  2. ^ Carlson, Rich (March 15, 2005). "Routes 1 thru 20". Illinois Highways Page. Retrieved June 4, 2006.[self-published source]