Interstate 155 (Illinois)

Interstate 155
I-155 highlighted in red
Route information
Auxiliary route of I-55
Maintained by IDOT
Length	32.13 mi[1] (51.71 km)
Existed	December 15, 1989 (December 15, 1989)[2]–present
History	Completed October 29, 1992[3]
NHS	Entire route
Major junctions
South end	I-55 in Lincoln
Major intersections	US 136 in Emden
North end	I-74 in Morton
Location
Country	United States
State	Illinois
Counties	Logan, Tazewell
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Illinois State Highway System Interstate US State Tollways Scenic
← IL 154 → IL 155

Interstate 155 (I-155) is a north–south spur of I-55 that provides an Interstate connection for the Illinois cities of Peoria and Lincoln. The northern terminus is just east of Peoria, at I-74 exit 101 in Morton. The southern terminus, which is northwest of Lincoln, is located on I-55 at exit 127. The highway is 32.13 miles (51.71 km) long.^[1]

I-155 was created to replace Illinois Route 121 (IL 121). Prompted by safety concerns at a major intersection near Morton, state transportation officials replaced the entire route with a limited-access freeway. The Interstate was built in several segments from 1970 to 1992, a period that included a 10-year delay due to a lawsuit over right-of-way. I-155 fully opened to traffic on October 29, 1992.^[2][3]