Interstate 90 Overnight Lane Closures and Traffic Diversions Planned at Brandon (Exit 406)

For Immediate Release:
Tuesday, July 1, 2025

Contact:
Michael Noonan, Project Engineer, 605-367-5680 

BRANDON, S.D. – Beginning at 7 p.m. on Wednesday, July 9, 2025, eastbound and westbound lanes of Interstate 90 will be temporarily closed to divert traffic through the on- and off-ramps at exit 406 (Brandon). This traffic diversion will be maintained through the overnight until 7 a.m. on Thursday, July 10, 2025. This traffic pattern switch is being scheduled to set forms for bridge decking. 

Lane closures and traffic diversions on I-90 at exit 406 are also planned from 7 p.m. on Thursday, July 10, 2025, through the overnight until 7 a.m. on Friday, July 11, 2025. This second night of the scheduled traffic diversion is to install components to build the bridge deck.

Traffic on S.D. Highway 11 will be maintained during these overnight traffic diversions. Flaggers will be posted to guide Highway 11 traffic as Interstate traffic will not be stopped. 

Dates for the traffic diversions are weather dependent and may be rescheduled as needed.

The prime contractor for this $41.3 million project is T & R Contracting of Sioux Falls, SD. The overall completion of the DDI reconstruction project at Brandon (exit 406) is June 2026.

Featured Project Information:
Find more information about this project on the SDDOT website at https://dot.sd.gov/i90-exit406-brandon-pcn-4433.

Sign Up for Text Notifications:
For updates on MAJOR traffic changes about this project, subscribe to a free text-in service. To subscribe, simply text "I90Exit406" to 605-566-4041. Subscribers can unsubscribe at any time. 

About SDDOT:
The mission of the South Dakota Department of Transportation is to provide a safe and efficient public transportation system.

For the latest on road and weather conditions, road closures, construction work zones, commercial vehicle restrictions, and traffic incidents, please visit https://sd511.org or dial 511.

Read more about the innovative work of the SDDOT at https://dot.sd.gov.

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