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Press Releases
Lane Restriction Planned on U.S. Highway 12 at West End of Missouri River Bridge Near Mobridge
During the afternoon hours on Wednesday, Oct. 29, 2025, the west end of the Missouri River Bridge over U.S. Highway 12 (located just west of Mobridge) will be reduced to one 11-foot wide lane of traffic. Read MoreSDDOT Seeks Public Input on Environmental Assessment and Section 4f Evaluation for Interstate 229 Exit 3 Interchange in Sioux Falls
The South Dakota Department of Transportation (SDDOT), in collaboration with the Sioux Falls Metropolitan Planning Organization (MPO), and the City of Sioux Falls, will hold an in-person public meeting open house on Wednesday, Nov. 5, 2025, from 5-6:30 p.m. (CT). Read MoreTraffic Shift and Overnight Lane Closures Scheduled on Interstate 90 at Hartford (Exit 387)
Beginning on Thursday, Oct. 16, 2025, traffic will be shifted onto the new pavement and bridge on Western Avenue over Interstate 90 at exit 387 (Hartford). Read MoreSDDOT Seeks Public Input for Proposed S.D. Highway 25 Reconstruction Project (S.D. Highway 34 to the Hanson/Miner County Line)
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house on Tuesday, Oct. 28, 2025, from 5:30 – 7 p.m. (CT) to inform area residents of the proposed S.D. Highway 25 reconstruction project from S.D. Highway 34 to the Hanson/Miner County line. Read MoreSDDOT Seeks Public Input for Proposed Reconstruction Project at U.S. Highway 85 and Colorado Boulevard Intersection in Spearfish
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house on Tuesday, Oct. 28, 2025, at 5:30 p.m. (MT) to inform area residents of the proposed project to reconstruct the intersection of U.S. Highway 85 and Colorado Boulevard in Spearfish. Read MoreRoad Closure Scheduled for U.S. Highway 385 from Pactola Dam to Taylor Ranch Road Near Hill City
Beginning on Monday, Oct. 20, 2025, U.S. Highway 385 from the south end of Pactola Dam to Taylor Ranch Road will be closed to through traffic. Read MoreSDDOT Seeks Public Input for S.D. Highway 115 Corridor Study in Sioux Falls Area
Open houses are scheduled for Tuesday, Oct. 21, 2025, from 5 – 6:30 p.m. at The Riverside, located at 317 E. 4th St. in Dell Rapids; and Wednesday, Oct. 22, 2025, from 5 – 6:30 p.m. at Special Olympics South Dakota, located at 800 E. Interstate Ln. in Sioux Falls. Read MoreFeatured Resources
View Detailed Active Featured Construction Project Information
The South Dakota Department of Transportation (SDDOT) is announcing the release of an Invitation for Proposals (IFP) seeking qualified parties interested in purchasing or leasing the State-owned Napa Junction to Platte rail line for common carrier freight rail operations.The full IFP, attachments, addenda, and question-and-answer forum are available on the SDDOT website at Bid Letting.
The information is located in the section entitled, “Lettings Currently Advertised for Bids.”
The South Dakota Department of Transportation will be appearing before the Interim Rules Review Committee on Wedneday, Nov. 12, 2025, at 11:00 a.m. Central Time in Room 414 of the Capitol Building in Pierre to present amendments to the following administrative rules:
70:01:02:26 – Edmunds County speed zone rule
70:01:02:52 – Moody County speed zone rule.More information about the rule amendments may be found on the OpenSD website.
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Meetings & Events
Statewide Active Transportation Plan - Rapid City Public Meeting
11/4/2025 5:30 PM MT / 6:30 PM CT
The South Dakota Department of Transportation (SDDOT) seeks input from residents and stakeholders to help develop the Statewide Active Transportation Plan. This comprehensive initiative is aimed at enhancing South Dakota’s public transportation system by incorporating active transportation modes such as walking and biking.
View DetailsSioux Falls Interstate 229 Exit 3 Environmental Assessment and Section 4(f) Evaluation Public Meeting Open House
11/5/2025 4:00 PM MT / 5:00 PM CT
The project will be hosting a public meeting open house on Wednesday, Nov. 5, 2025 from 5 p.m. to 6:30 p.m. at Lincoln High School to review the Environmental Assessment and Section 4(f) Evaluation for the exit 3 (Minnesota Avenue) interchange.
View DetailsStatewide Active Transportation Plan - Pierre Public Meeting
11/5/2025 4:30 PM MT / 5:30 PM CT
The South Dakota Department of Transportation (SDDOT) seeks input from residents and stakeholders to help develop the Statewide Active Transportation Plan. This comprehensive initiative is aimed at enhancing South Dakota’s public transportation system by incorporating active transportation modes such as walking and biking.
View DetailsChamberlain Area Transportation Study
11/20/2025 4:30 PM MT / 5:30 PM CT
This study examines walking, biking, transit, freight, and vehicular needs by looking 20 years ahead. We want to anticipate mobility challenges before they occur, while also looking at which current mobility trends may be a good fit for the community.
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