WILLIAMSON COUNTY, Ill. (WSIL) -- The Illinois Department of Transportation announced changes to traffic patterns on Illinois 13 near Carterville beginning Monday, Aug. 25.

Starting that day, Illinois 13 will be reduced to one lane in each direction, separated by concrete barriers, to accommodate construction of new westbound lanes and replacement bridges over the Crab Orchard Lake causeway.

Cambria Road and Shawnee Trail will be closed at their intersections with Illinois 13 for the duration of this phase. Boat access to the Cambria Neck north of Illinois 13 and pedestrian access to the causeway will also close beginning Sept. 2.

These closures, required for safety and construction staging, are expected to continue through September 2026.

Motorists should expect delays and are encoura

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