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Press Releases
Interstate 90 Eastbound On-Ramp Scheduled to Close at Exit 332 (Mitchell)
On Tuesday, May 19, 2026, the eastbound on-ramp at exit 332 (Mitchell) on Interstate 90 will be closed. Read MoreSDDOT Adding Safety Enhancements on Euclid Avenue Project for Railroad Overpass in Pierre
As part of the current reconstruction project, the South Dakota Department of Transportation (SDDOT) will be adding warning devices and other safety enhancements to reduce the number of over height vehicle hits of the railroad overpass over Euclid Avenue in Pierre. Read More2026 Transportation Alternatives (TA) Program Funding Available through SDDOT
Letters of Intent are now being accepted for the Transportation Alternatives (TA) program through the South Dakota Department of Transportation (SDDOT). Read MoreSDDOT Earns Performance Excellence Network (PEN) Highest Honor
The Performance Excellence Network (PEN), a regional Baldrige-based program serving South Dakota, North Dakota, and Minnesota, recognized 18 recipients across multiple organizations with 2025 Performance Excellence Awards. Read MoreSDDOT Seeks Public Input for Interstate 29 Corridor Study in North Sioux City
The South Dakota Department of Transportation (SDDOT), in collaboration with the Siouxland Interstate Metropolitan Planning Council (SIMPCO), the City of North Sioux City, the community of Dakota Dunes, and Union County, will hold a public meeting open house from 4:30 p.m. to 6:30 p.m. (CT) on Tuesday, May 19, 2026, at the North Sioux City Community Center located at 205 Sodrac Dr. in North Sioux City. Read MoreOmaha Street Traffic Signal and Roadway Lighting Modification Project to Begin in Rapid City
On Monday, May 18, 2026, work is scheduled to begin on a traffic signal and roadway lighting modification project along Omaha Street between West Boulevard and Maple Avenue in Rapid City. Read MoreMobridge Area Project Resuming on U.S. Highway 12 and S.D. Highway 1806
On Monday, May 4, 2026, paving operations are beginning for the multi-year project on U.S. Highway 12 from Mobridge to the west approximately 14 miles. Read MoreFeatured Resources
2026 Planned Construction Map
National Work Zone Awareness Week April 20-24, 2026COMMONLY ASKED QUESTIONS:
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SD Department of Public SafetyMap of Region and Area Boundaries
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Meetings & Events
May 19, 2026 - Interstate 29 Corridor Study Public Meeting
5/19/2026 3:30 PM MT / 4:30 PM CT
The public meeting open house will be informal, allowing for one-on-one discussion with the study team. A prerecorded presentation will play on a continuous loop for the duration of the open house. Informational display boards will also be provided.
View DetailsAeronautics Commission Meeting 05/21/2026
5/21/2026 1:00 PM MT / 2:00 PM CT
The agenda and corresponding attachments for the meeting, as well as additional information about the Commission, can be found here:
View DetailsTransportation Commission Meeting 05/28/2026
5/28/2026 8:00 AM MT / 9:00 AM CT
The agenda and corresponding attachments for the meeting, as well as additional information about the Commission, can be found here Boards and Commissions.
View DetailsPublic Meeting - U.S. Highway 85 from Wyoming to Cheyenne Crossing
6/4/2026 5:30 PM MT / 6:30 PM CT
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house to present the design and construction phasing for the above project and receive public input. A short presentation will be given shortly after 5:30 followed by an informal open house including discussion with SDDOT design staff.
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