Illinois Route 171
Illinois Route 171 (IL 171) is a 38.61-mile-long (62.14 km) north–south state highway 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. 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.
Illinois Route 171 | ||||
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IL 171 highlighted in red | ||||
| Route information | ||||
| Maintained by IDOT and CDOT | ||||
| Length | 38.61 mi (62.14 km) | |||
| Existed | 1946–present | |||
| Major junctions | ||||
| South end | US 6 in Joliet | |||
I-355 Toll near Lockport US 12 / US 20 / US 45 in Willow Springs I-294 Toll in Justice I-55 in Summit US 34 in Lyons I-290 / IL 110 (CKC) in Maywood I-90 in Chicago | ||||
| North end | IL 72 in Chicago | |||
| Location | ||||
| Country | United States | |||
| State | Illinois | |||
| Counties | Will, Cook | |||
| Highway system | ||||
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The current Illinois Route 171 incorporates part or all of previous IL 4, IL 4A, and IL 213.
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