Construction on I-39/90 interchange, Rock River bridge starts this week

What you need to know: Friday

The Wisconsin Department of Transportation will start construction work on Interstate 39/90 and Highway 59 interchange this week, according to a release.

Work will also start on I-39/90 and the Rock River bridges near Edgerton and Newville, officials said.

The interchange will be reconfigured into a diamond interchange with three roundabouts to improve safety, efficiency and reduce congestion in the area, according to the release. The new Highway 59 bridge over the interstate will be constructed south of the existing structure to maintain access to area businesses and neighborhoods.

Crews will start construction of the new piers for the interstate bridges over the Rock River in early March, officials said. Boater safety signs will be put up at active boat launches along Lake Koshkonong and the Rock River.

Periodic lane and ramp closures are anticipated at the interchange throughout the project, including nighttime lane closures on the interstate near the Highway 59 interchange, according to the release.

All lane restrictions and construction work are weather dependent and subject to change, officials said.

The projects are being completed as part of the Interstate 39/90 expansion from the Illinois state line to the Highway 12/18 interchange in Madison.

The Highway 59 interchange is expected to be done in November, officials said. The interstate widening and Rock River bridge replacement are expected to be done in early fall 2018.

Both projects will cost $48.4 million.