Jefferson County, IL – Southern Illinois drivers have something to celebrate as the Illinois Department of Transportation (IDOT) announces the full reopening of Interstate 64 following months of construction. The 11-mile concrete overlay project between west of Mt. Vernon and the Washington County line is now complete.
According to IDOT, the project aimed to strengthen the highway’s surface and extend its lifespan through a durable concrete overlay. The improvements are part of the state’s broader Rebuild Illinois infrastructure initiative.
Officials said all major construction work has been completed, and the roadway is now fully open in both directions. Only minor finishing tasks—such as shoulder work and final striping—will continue into spring 2026, with minimal impact on traffic.
The upgraded stretch of I-64 will provide a smoother, longer-lasting driving experience for daily commuters, freight carriers, and travelers crossing Jefferson and Washington counties. IDOT advises drivers to stay alert for occasional workers still on-site and to obey posted work-zone speed limits.
The completion of this project marks another milestone in Illinois’ ongoing effort to modernize its transportation network, ensuring safer and more efficient travel across southern Illinois.
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