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Illinois Department of Transportation

Dekalb County - Illinois 23 at Chicago Road

The Illinois Department of Transportation is in the planning and early phase of a study to improve the Illinois 23 and County Highway 16 (Chicago Road) intersection in DeKalb County. This project consists of reconstruction of the intersection into a roundabout.

The improvement is tentatively scheduled in the department’s FY 2025-2030 Highway Improvement Program, subject to project readiness and funding availability. During construction the west leg of Chicago Road is planned to be closed.

Please explore this page for further information regarding the improvement. There are additional location maps, crash exhibits, photos, and preliminary typical sections available.

The public is invited to learn more about the proposed improvements at the intersection of Illinois 23 and Chicago Road (County Highway 16) south of Waterman. Instead of hosting an in-person meeting, IDOT will present project information and encourage public input from April 14 through May 14 via this website.

  • Select Resources to access the recorded presentation and other materials. 
  • Select Getting Involved to comment on the proposed improvements. 
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IDOT project phases

PHASE I

  • Preliminary engineering and environemental studies
  • Develop project scop

PHASE II

  • Contract plan preparation
  • Local agency agreements
  • Land acquisition

PHASE III

  • Construction

Traffic will follow a detour using Rollo Road, Suydam Road and Somonauk Road.

Your input is important to us, and we encourage you to share your thoughts and quesitons. Share your feedback.

Virtual Public Meeting Notice 

Questions about the improvement at this intersection can be directed to:  

Kenneth Banga
Location and Environmental Studies Engineer
Phone: (815) 434-8469

Learn more about IDOT projects. For IDOT District 3 updates, follow us on Twitter at @IDOTDistrict3 or view area construction details on IDOT's traveler information webpage.