Chicago Construction News staff writer
Illinois officials joined Governor JB Pritzker and the Illinois Department of Transportation this week to celebrate the start of construction on new Interstate 80 bridges over the Des Plaines River, marking the final phase of a sweeping $1.3 billion modernization of one of the state’s most critical transportation corridors.
The bridge project, which began earlier this month, represents the centerpiece of the broader I-80 rehabilitation effort and a key component of the state’s capital investment initiative, Rebuild Illinois. Once complete, the effort will conclude a multiyear overhaul of the 16-mile corridor stretching from Minooka to Joliet.
“Illinois has undertaken a full-scale revitalization of infrastructure systems across our state, and I’m proud to see the final phase of our vital I-80 corridor modernization project get underway,” Governor Pritzker said. “In every corner of the state, Rebuild Illinois has put tens of thousands of people to work to transform our infrastructure and deliver real results for the People of Illinois.”
The $164 million Des Plaines River bridge replacement is currently the largest and most complex active project managed by Illinois Department of Transportation. The existing structures, originally built in the 1960s, will be replaced by two wider concrete bridges located approximately 300 feet north of the current alignment. Construction is expected to be completed in 2028, with demolition of the old bridges scheduled for 2029.
Illinois Transportation Secretary Gia Biagi said the project represents a major step forward for regional mobility and safety.
“The start of construction on these bridges represents not just another huge milestone for I-80, but more jobs, improved safety, and enhanced quality of life for the region and the state,” Biagi said. “A project of this magnitude would not have been possible without Governor Pritzker’s leadership and vision.”
Local leaders echoed that sentiment. Terry D’Arcy called the project a critical investment in regional commerce and connectivity, noting the importance of the I-80 corridor to both local communities and national freight movement.
The broader I-80 transformation project is rebuilding and redesigning 16 miles of highway and multiple interchanges, including major upgrades at I-55, Larkin Avenue, Center Street, Chicago Street, Richards Street, and Briggs Street. More than 30 bridges are being rehabilitated or replaced along the corridor.
By the end of 2026, officials say roughly 80% of the corridor improvements will be complete. Later this year, motorists will begin seeing expanded capacity, with a new third lane opening in each direction across key segments of the route. Several newly rebuilt interchanges are also expected to open, including a flyover ramp connecting southbound I-55 to eastbound Interstate 80.
Once fully completed, the I-80 corridor will serve as a fully modernized east-west freight and passenger artery through northern Illinois, strengthening one of the nation’s most heavily traveled logistics routes.
