Route information | ||||
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Maintained by IDOT | ||||
Length | 112.05 mi[1] (180.33 km) | |||
Existed | November 5, 1918[2]–present | |||
Major junctions | ||||
South end | I-74 / IL 29 in East Peoria | |||
I-74 in Peoria US 150 in Peoria US 6 / US 34 in Sheffield I-80 in Sheffield I-88 / IL 110 (CKC) in Rock Falls US 30 in Rock Falls | ||||
North end | IL 78 in Mount Carroll | |||
Location | ||||
Country | United States | |||
State | Illinois | |||
Counties | Tazewell, Peoria, Marshall, Stark, Bureau, Whiteside, Carroll | |||
Highway system | ||||
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Illinois Route 40 (IL 40) is a 112.05-mile-long (180.33 km) north–south route in central portion of the U.S. state of Illinois. It runs from Interstate 74 (I-74) in East Peoria north to IL 78 at Mt. Carroll, just south of U.S. Route 52 (US 52) and IL 64.[1]