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Mobridge 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 MoreRural Access Infrastructure Funding (RAIF) Provides Vital State and Local Partnership for Inventory and Replacement of Small Structures
Legislation passed by the 2026 legislature and signed by Governor Larry Rhoden will give counties additional funding to repair and replace deficient culverts and small bridges on township and county secondary roads. Read MoreMilling and Paving Project Scheduled to Begin on S.D. Highway 34 Near Howes and S.D. Highway 73 South of Faith
Beginning on Monday, May 6, 2026, an asphalt milling project will begin on S.D. Highway 34 from three miles east of White Owl to the Ziebach County Line. Read MorePavement Repair Project Planned at Interstate 29 and Interstate 90 Interchange in Sioux Falls
On Tuesday, May 5, 2026, a pavement repair project is tentatively scheduled to begin at the Interstate 29 and Interstate 90 interchange in Sioux Falls. Read MoreAccelerated Construction Schedule Planned for Eastbound Interstate 90 Project Between Kennebec and Reliance
A 15 mile shoulder project is scheduled to begin Tuesday, April 28, 2026, on eastbound Interstate 90 between Kennebec and Reliance. Read MoreSDDOT Reminder: Election Signs Not Allowed in State Right of Way
Illegal signs create a safety hazard and may distract motorists from seeing important regulatory or directional signing. Read MoreSDDOT in Search of Borrow Material Providers for S.D. Highway 45 Project near Miller
The SDDOT is reaching out to area landowners to generate interest as a borrow provider. 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
Transportation Commission Meeting 05/14/2026
5/14/2026 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 DetailsU.S. Highway 16A in Keystone - Bridge Replacement - Preconstruction Informational Meeting
5/14/2026 4:30 PM MT / 5:30 PM CT
On Thursday, May 14, 2026, the South Dakota Department of Transportation (SDDOT) in collaboration with Complete Concrete, Inc. will hold a preconstruction informational meeting to discuss the bridge replacement project on U.S. Highway 16A in Keystone. The open house style informational meeting is scheduled from 4:30 p.m. – 6:30 p.m. (MT) at Keystone Community Center, located at 1101 Madill St. in Keystone.
View DetailsMay 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:
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