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SDDOT Awarded Competitive Highway Bridge Program (CHBP) Grant for Platte-Winner Bridge Replacement Project
The U.S. Department of Transportation’s Federal Highway Administration (FHWA) has awarded the South Dakota Department of Transportation (SDDOT) a $65 million grant through the Competitive Highway Bridge Program (CHBP) for the S.D. Highway 44 Platte-Winner Bridge replacement project. Read MoreMobridge Area Project Scheduled to Begin on U.S. Highway 12 and S.D. Highway 1806
On Monday, April 13, 2026, a project is scheduled to begin on U.S. Highway 12 from Mobridge west approximately 15 miles and on S.D. Highway 1806 both north and south of Highway 12. Read MoreS.D. Highway 271 Project to Begin in North Central South Dakota from S.D. Highway 10 to North Dakota Border
Beginning Monday, April 13, 2026, a project is scheduled to begin in north central South Dakota on S.D. Highway 271 from S.D. Highway 10 to the North Dakota border. Read MoreSDDOT Seeks Public Input for Proposed S.D. Highway 28 Bridge Structure Replacement over Lake Poinsett Inlet
SDDOT) will hold a public meeting open house on Thursday, April 23, 2026, from 5:30 – 6:30 p.m. to inform area residents of a proposed bridge structure replacement project on S.D. Highway 28. Read MoreSDDOT Seeks Public Input for Proposed U.S. Highway 12 Structure Replacement over Whetstone Diversion Channel in Big Stone City
SDDOT will hold a public meeting open house on Monday, April 20, 2026, for the proposed structure replacement project on U.S. Highway 12 over the Whetstone Diversion Channel in Big Stone City. Read MoreConstruction Project Scheduled to Begin on S.D. Highway 28 in Toronto
On Thursday, April 9, 2026, an urban reconstruction project will begin on S.D. Highway 28 through Toronto. Traffic control will be placed first. Read MoreSDDOT to Host 2026 Construction Season Kick-Off Webinar for National Work Zone Awareness Week
Webinar scheduled for Friday, April 17, 2026, at 2 p.m. (CT) / 1 p.m. (MT). Read MoreFeatured Resources
Notice of Public Hearing:
Pursuant to the authority vested in the South Dakota Transportation Commission by South Dakota Codified Law chapter 1-26, the Transportation Commission will hold a public hearing in the Commission Room of the Becker Hansen Building at 700 E. Broadway Ave. in Pierre, on Thursday, April 23, 2026, at 9 a.m. (CT) to consider amendments to Administrative Rule of South Dakota numbered: 70:01:02:44 – Lincoln County speed zone rule
The South Dakota Transportation Commission is considering whether to reduce the speed limit on South Dakota Highway 115 around its intersection with South Veterans Parkway in Lincoln County, South Dakota. The current speed limit in that area is fifty-five miles per hour, but a reduced speed limit would be more appropriate in this urban area. The purpose of reducing the speed limit is to enhance safety.
View here: https://rules.sd.gov/
2026 Planned Construction Map
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Meetings & Events
Interstate 29 - Exit 26, S.D. Highway 50, and Exit 31, S.D. Highway 48 Interchanges over I-29 Public Meeting
4/14/2026 4:30 PM MT / 5:30 PM CT
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house to discuss and receive public input on the above project. A short presentation will take place at 5:30 p.m.
View DetailsPublic Meeting April 16, 2026 - S.D. Highway 27 Between Britton and Langford
4/16/2026 4:30 PM MT / 5:30 PM CT
The South Dakota Department of Transportation (SDDOT) will hold a public meeting to discuss and receive public input on the above project. The open house will be informal, with one-on-one discussion with SDDOT design staff.
View Details2026 Statewide Construction Season Kick-Off Webinar
4/17/2026 1:00 PM MT / 2:00 PM CT
The South Dakota Department of Transportation invites you to join our statewide Construction Season Kickoff Webinar. This online event will launch the 2026 season, highlight major highway projects across the state, and provide the tools you need to plan your travel safely and efficiently.
View DetailsPublic Meeting - U.S. Highway 12 Over Whetstone Diversion Channel in Big Stone City
4/20/2026 4:30 PM MT / 5:30 PM CT
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house to discuss and receive public input on the above project. The open house will be informal, with one-on-one discussion with SDDOT design staff.
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