HR Green, the Illinois Tollway, and Stantec won the Honor Award and the Judges Choice Award in ACEC Illinois’ 2021 Engineering Excellence Award Competition for the Illinois Route 23 Interchange on I-90 project. The project also won a National Recognition Award in the ACEC National competition.

In December 2019, the Illinois Tollway delivered a long-awaited interchange in McHenry County at Illinois Route 23 on the Jane Addams Memorial Tollway (I-90) featuring roundabouts and all-electronic tolling at the I-90 exit and entrance ramps to improve safety and mobility.

I-90 is the only interstate that cuts through McHenry County and the new interchange at Route 23 is the county’s first. The interchange gives the City of Marengo, a rural community 60 miles west of Chicago, and surrounding communities direct access to I-90.

The project is the result of years of planning, study, and cooperation through a partnership among the Illinois Tollway, the Illinois Department of Transportation, the McHenry County Division of Transportation, and Marengo.