Traffic Switch Scheduled for Interstate 90 Project in South Dakota

Drivers navigating their way through a construction zone spanning Interstate 90 in South Dakota are in for a change this week.

The South Dakota Department of Transportation has announced that beginning Friday (August 30), a traffic switch is scheduled on South Dakota Highway 11, south of the bridge at I-90 (Exit 406) in Brandon.

Traffic that is currently using the northbound lane of Highway 11 will be switched to the southbound lane to allow work to begin south of the bridge. The switch will begin at Redwood Boulevard to the south end of the bridge. Access to businesses on the east side of Highway 11 will be maintained during operations through direct access or by detour routes.

This traffic diversion will be in place for approximately three weeks until grading and paving work in the northbound lane of Highway 11 is completed.

The work is all part of a $41.3 million project that includes the reconstruction of Exit 406 at Brandon with added lighting, signals, and mainline Interstate work. This project also includes three structure replacements.

The interchange will be reconstructed as a Diverging Diamond Interchange (DDI). Westbound I-90 lanes (along with the railroad structure on I-90) will be reconstructed in 2024 and the eastbound lanes in 2025. The interchange itself and new structure over I-90 will be reconstructed between the 2024 and 2025 construction seasons.

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The anticipated overall completion of the project is June 2026.