I-57 Expansion Project in Southern Illinois

under construction

A $325 million expansion project on Interstate 57 in southern Illinois, stretching nearly 37 miles from the I-57/I-24 junction south of Marion to the I-57/I-64 junction north of Mt. Vernon. The project involves adding lanes to provide three lanes in each direction, installing new drainage structures, constructing median barrier walls, replacing bridges over Marcum Branch, Gun Creek, and Dodds Creek, and reconstructing the I-57/64 interchange with Illinois 15. Additional safety features include new guard rails, rumble strips, and raised reflectors. The project aims to enhance safety, support economic growth, and improve freight and passenger traffic flow on a critical freight corridor.