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Press Releases
SDDOT Extends Written Public Comment Period for Proposed Design on U.S. Highway 85 Reconstruction Project in Lawrence County
Based upon requests from members of the public, the SDDOT has extended the written comment period from the original date of Friday, June 19, 2026, to Friday, Sept. 4, 2026. Read MoreMultiple Chip Seal and Fog Seal Projects Scheduled to Begin in the Mobridge Area
On Monday, June 15, 2026, crews will begin a chip seal and fog seal project on several routes in the Mobridge area. Read MoreTemporary Road Closures Scheduled on U.S. Highway 16A and S.D. Highway 244 for Mount Rushmore Fireworks Event
The South Dakota Department of Transportation (SDDOT) will place temporary road closures to accommodate security needs for the pre-sale ticketed Freedom 250 at Mount Rushmore event scheduled for Friday, July 3, 2026. Read MoreSDDOT Seeks Public Input for Proposed Interstate 90 Grading, Surfacing, and Structure Replacement Project in Sioux Falls
The South Dakota Department of Transportation (SDDOT) will hold a public meeting open house on Wednesday, June 24, 2026, from 5:30 to 6:30 p.m. to inform area residents of the proposed Interstate 90 grading, surfacing, and structure replacement project in Sioux Falls. Read MoreInformational Meeting Scheduled for Spearfish (Exit 10) Reconstruction Project on Interstate 90
On Thursday, June 18, 2026, the South Dakota Department of Transportation (SDDOT) in collaboration with the project contractor, Tru-Form Construction, Inc., will hold an informational meeting to discuss the upcoming reconstruction project at Spearfish (exit 10) on Interstate 90. Read MoreMultiple Chip Seal and Fog Seal Projects Scheduled to Begin in the Pierre Area
On Monday, June 8, 2026, crews will begin a chip seal and fog seal project on several routes in the Pierre area. Read MoreRoad Closure Scheduled for S.D. Highway 38 Grading Project East of Mitchell
Beginning on Monday, June 8, 2026, S.D. Highway 38 will be closed to through traffic from 421st Avenue to S.D. Highway 25 east of Mitchell. Read MoreFeatured Resources
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Meetings & Events
Aeronautics Commission Meeting 06/18/2026
6/18/2026 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: Boards and Commissions
View DetailsThursday, June 18, 2026, Informational Meeting - Spearfish (exit 10) on Interstate 90
6/18/2026 5:00 PM MT / 6:00 PM CT
On Thursday, June 18, 2026, the South Dakota Department of Transportation (SDDOT) in collaboration with the project contractor, Tru-Form Construction, Inc., will hold an informational meeting to discuss the upcoming reconstruction project at Spearfish (exit 10) on Interstate 90. This reconstruction project includes modifying the exit 10 intersection and adding new traffic signals and luminaires.
View DetailsJune 24, 2026 Public Meeting - Interstate 90 from Interstate 29 (Exit 396) to Cliff Avenue (Exit 399) and east of Interstate 229 (Exit 400)
6/24/2026 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.
View DetailsTransportation Commission Meeting 06/25/2026
6/25/2026 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 Details