Intersection Improvements Begin at Illinois 161 and Illinois 158

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The Illinois Department of Transportation announced that improvements at the intersection of Illinois 161 and Illinois 158 in St. Clair County will require daily lane closures beginning Tuesday, March 17. Motorists should expect delays and are encouraged to use alternate routes during this closure.

Why it matters

This intersection improvement project aims to enhance traffic flow and safety in the Belleville area, which sees high volumes of commuter and commercial traffic along these two major state routes.

The details

The project will involve various lane closures and construction work at the intersection over the next few months. Drivers are urged to slow down, avoid distractions, and follow all signage in the work zone.

• The lane closures will begin on Tuesday, March 17, 2026.
• The project is expected to be completed by early summer 2026.

What’s next

Motorists should plan ahead, allow extra time, and consider alternate routes while this intersection improvement project is underway.