Illinois Route 29 is a two to four lane state highway that runs south from U.S. Route 6/Illinois Route 89 at Spring Valley to U.S. Route 51/Illinois Route 16 at Pana, running through Pekin, Peoria and Springfield. The nearest major north–south highway, Interstate 39, runs parallel to Illinois 29, but approximately fifty miles to the east. Illinois 29 is 175.36 miles (282.21 km) long.

Illinois Route 89 (IL 89) is a 55.48-mile-long (89.29 km) rural, north–south state highway in central Illinois. It runs from U.S. Route 34 (US 34) in La Moille southward to IL 116 in Metamora. IL 26 and IL 89 are the main north–south roads between Interstate 39 (I-39)/US 51 and IL 29.