Weber Road at I-55

Illinois Department of Transportation | Romeoville, IL
interstate interchange

Located within one of the fastest growing counties in Illinois, the Weber Road and I-55 Interchange was in need of capacity and safety improvements. To better accommodate the area’s current and future needs, the state led a $96 million project to update the interchange. Now featuring a Diverging Diamond Interchange (DDI) design, the roadway provides improved mobility for the 45,000 daily motorists passing through the interchange as well as safer connectivity for multimodal transportation.

Benesch served as the Construction Manager for this project, which required significant coordination with the Will County Division of Transportation and the Villages of Bolingbrook and Romeoville. Additional coordination was needed to implement the project’s complex staging plan in tandem with an adjacent construction project along the corridor.

In addition to the new interchange, the project expanded Weber Road from five lanes to six and included dual left turn lanes at key locations, thereby improving efficiency and safety. New shared-use pathways, sidewalks, traffic signals and roadway lighting bring additional improvements that will serve roadway users of all types. A new two-span bridge over I-55 and reconfigured interchange ramps were constructed to accommodate the diverging diamond configuration.


  • 2024, National Recognition Award, American Council of Engineering Companies
  • 2024, Lincoln Grand Conceptor Award, American Council of Engineering Companies of Illinois
  • 2023, Exceptional Consulting Engineering Service Award, Illinois Department of Transportation