Interstate 155 (Illinois)

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.

Interstate 155

I-155 highlighted in red
Route information
Auxiliary route of I-55
Maintained by IDOT
Length32.13 mi (51.71 km)
ExistedDecember 15, 1989 (December 15, 1989)–present
HistoryCompleted October 29, 1992
NHSEntire route
Major junctions
South end I-55 in Lincoln
Major intersections US 136 in Emden
North end I-74 in Morton
Location
CountryUnited States
StateIllinois
CountiesLogan, Tazewell
Highway system
  • Main
  • Auxiliary
  • Suffixed
  • Business
  • Future
IL 154 IL 155

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.

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