Beginning Monday, motorists will begin to experience the $343 million Twin Ports Interchange reconstruction project as a prelude to work carrying through at least 2023.

Motorists traveling on northbound and southbound Interstate 35 will encounter lane closures at 27th Avenue West and near the Garfield Avenue overpass in Duluth, a Minnesota Department of Transportation news release said Tuesday.

Lane closures will remain in place through winter while crews construct crossover ramps in preparation of major construction on the Twin Ports Interchange project beginning in the spring.

The work starting next week will also help facilitate replacement of the 27th Avenue West Bridge this winter.

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Beginning next spring, each direction of I-35 will be reduced to one lane. Then next fall, the northbound lane will remain on the interstate, while southbound traffic will move to Lower Michigan Street. The lane restrictions will continue through 2023, and final touches on the project may now stretch into 2024, MnDOT officials said.

Motorists are encouraged to allow for extra time and check before traveling for information on road conditions, closures and detour routes.

For more information on the Twin Ports Interchange project, visit or call the Twin Ports Interchange Hotline at 218-343-3748.