Illinois Route 171

Illinois Route 171 (IL 171) is a north–south state road in northeastern Illinois. It runs from U.S. Route 6 (US 6) in Joliet north to Illinois Route 72 at the Chicago–Park Ridge border. This is a distance of 38.61 miles (62.14 km). The section of IL 171 on Archer Avenue from Joliet to Summit is historically significant, originating as a Native American trail, and later serving for a time as part of the first numbered highway between St. Louis and Chicago. The current Illinois Route 171 incorporates part or all of previous IL 4, IL 4A, and IL 213.

Illinois Route 171

Illinois Route 171 (IL 171) is a north–south state road in northeastern Illinois. It runs from U.S. Route 6 (US 6) in Joliet north to Illinois Route 72 at the Chicago–Park Ridge border. This is a distance of 38.61 miles (62.14 km). The section of IL 171 on Archer Avenue from Joliet to Summit is historically significant, originating as a Native American trail, and later serving for a time as part of the first numbered highway between St. Louis and Chicago. The current Illinois Route 171 incorporates part or all of previous IL 4, IL 4A, and IL 213.