Business Loop I-55 - Springfield

I-55/72 south at Business Loop I-55 in Springfield, Illinois — Diagrammatic sign posted ahead of the south split of I-55 and I-72 in Springfield. Return access to Business Loop I-55 (6th Street) departs as I-72/U.S. 36 branch west to Jacksonville. Photo by Stephen Summers (10/00).

The nearly 14 mile route of Business Loop I-55 through Springfield replaced U.S. 66 and U.S. 66 Business northward from Exit 97 to Exit 105. Following 6th Street, Business Loop I-55 splits from I-55 north via a left exit as part of the exchange with Interstate 72 west to Jacksonville. 6th Street proceeds north from there through the village of Southern View and south Springfield as a commercial arterial.

A couplet then separates traffic with northbound using 6th and Myrtle Streets and southbound using Spruce and 5th Streets. 9th Street leads Business Loop I-55 north with two-way traffic to Downtown, seven blocks east of the Illinois State Capitol. Progressing northward, the route transitions from N 9th Street to Peoria Road ahead of the Illinois State Fair Grounds and Veterans Parkway (IL 29).

Business Loop I-55 overtakes Veterans Parkway from IL 29 to join with the Historic U.S. 66 Bypass route ahead of the Sangamon River and village of Sherman. Sherman Boulevard crosses the community northeast to Interstate 55, which directly upgraded old U.S. 66 northward to Williamsville.

Updated August 4, 2026