
Changes Coming To I-90 Traffic
An ongoing major road construction project on Interstate 90 is about to enter a new phase of traffic diversions.
What's Impacted?
According to the South Dakota Department of Transportation, beginning Monday (August 25) at 8:00 PM, the eastbound and westbound lanes of I-90 will be temporarily closed to divert traffic through the on- and off-ramps at the Brandon Exit (406).
This traffic change will be maintained overnight until 7:00 AM, Tuesday (August 26).
Why the Closure?
The switch is necessary to facilitate the removal of deck forms from the exit bridge.
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Traffic on S.D. Highway 11 will be maintained during this overnight traffic diversion. Flaggers will be posted to guide Highway 11 traffic, as Interstate traffic will not be stopped.
Project Overview
The $41.3 million Diverging Diamond Intersection project will be completed in June of 2026.

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