A state commission has approved expanding Interstate 39-90 from Madison to the Illinois border.
The plan calls for expanding a 45-mile stretch of I-39/90 between Madison and Beloit from four lanes to six. State transportation officials estimate the project will cost about $715 million.
The Transportation Projects Commission approved the project on a near unanimous vote. State Sen. Glenn Grothman, a West Bend Republican, was the only dissenter, saying I-43 north of Milwaukee should be expanded to six lanes first.
Under state law, the commission approves only transportation projects outside of southeastern Wisconsin. The vote on Tuesday clears the way for the next governor and Legislature to set aside money for the project in the next state budget, if they so choose.