Illinois Route 31 Study

The Illinois Department of Transportation (Department) is currently conducting a preliminary engineering and environmental study (Phase I) for the improvement of IL 31 from IL 176 to IL 120 in McHenry County.  Funding for Phase II engineering is included in the Department’s FY 2017-2022 Proposed Highway Improvement Program.  The remaining elements of the project will be included in our priorities for future funding consideration among similar improvement needs throughout the region.  The general scope of work for this improvement is anticipated to consist of roadway widening and reconstruction to provide two lanes in each direction separated by a median, bicycle and pedestrian accommodations, and intersection and drainage improvements. 

Click here to go to the project website

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