Lane Closures Coming to Interstate 90 in South Dakota

With spring arriving on the calendar this week (March 20), we're about to kick off the unofficial start of South Dakota's 'fifth season'—road construction season.

One of the first projects to impact drivers will take place on Interstate 90.

Beginning Monday, (March 24), the South Dakota Department of Transportation will be implementing lane closures on westbound I-90 at the Brandon Exit (406).

The traffic diversion on South Dakota Highway 11 over the Exit Bridge at I-90 will remain as one lane of traffic north and one lane of traffic south from Ash Street North.

This configuration will be in place until the second half of the structure is complete. Access to businesses between exit 406 and Ash Street North will remain as only right-turn in and right-turn out.

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The second phase of reconstruction includes completing the remaining on and off-ramps, the eastbound lanes of I-90, the Exit Bridge, and the replacement of the eastbound I-90 bridge over the BNSF railroad. Weather dependent, all phase two construction is anticipated to begin in early April.

The work is all part of the $41.3 million Diverging Diamond Interchange (DDI) reconstruction project, which is scheduled to be completed in June of 2026.