High Quality Content by WIKIPEDIA articles! Interstate 155 (I-155) is a north–south spur of Interstate 55 that provides an interstate connection for the Illinois cities of Peoria and Lincoln. The northern terminus for the interstate is just east of Peoria, at Interstate 74 exit 101 in Morton. The southern terminus, which is northwest of Lincoln, is located on I-55 at exit 127. The interstate is 32.13 miles (51.71 km) long.