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I-57 Expansion in Southern Illinois
The I-57 expansion is one of the largest corridor improvements projects in our system, and is undergoing a multi-year transformation, expanding from four to six lanes. This major infrastructure upgrade is designed to ease congestion, improve safety, and accommodate future growth along a nearly 37-mile corridor on I-57 in southern Illinois. Construction is ongoing through 2028.
Rebuild Illinois is investing nearly $325 million to complete the expansion of I-57 to Mt. Vernon, as well as replacing bridges over Marcum Branch, Gun Creek, Dodds Creek and reconstructing the I-57/64 interchange with Illinois 15.
Peek Into I-57 Improvements
Mileposts 66-75, third lane expansion and replacement of bridges over the Middle Fork of the Big Muddy River in Franklin County
The 9-mile Interstate 57 additional lane project begins north of West Frankfort (milepost 66) and ends north of Benton (milepost 75) in Franklin County. The project includes adding one lane in each direction, installing a median barrier, resurfacing existing lanes, upgrading storm sewers and drainage structures, replacing the dual structures over the Middle Fork of the Big Muddy River, updating pavement markings and deficient guardrails, and installing raised reflectors and rumble strips.
