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SDDOT Snowplow Contest Winners . . . Like a Rhinestone Plowboy - Riding out in a Plow on a Snow-Filled “Roadeo”
The South Dakota Department of Transportation (SDDOT) is excited to announce another round of outstanding winners in the sixth annual snowplow naming contest. Read MoreYankton County Highways Scheduled for Closure for James River Bridge Replacement Project
Beginning on Tuesday, Jan. 20, 2026, Yankton County Highway 587 (Stone Church Road) and County Highway 217 (Northwest Jim River Road) will be closed to through traffic for the replacement of the James River Bridge. Read MoreS.D. Highway 127 Scheduled to Close for Bridge Replacement Project Near Sisseton
Beginning on Tuesday, Jan. 20, 2026, a bridge and box culvert replacement project is scheduled to begin over the Little Minnesota River on S.D. Highway 127 near Sisseton. Read MoreSDDOT 2025 Annual Report is now available!
Read about innovative projects that were completed this past year and take an in-depth look at SDDOT programs and services. Read MoreRepair Project Scheduled on U.S. Highway 14A near Cheyenne Crossing in Spearfish Canyon
Beginning on Monday, Jan. 19, 2026, a repair project is scheduled to begin on U.S. Highway 14A approximately one-half mile north of Cheyenne Crossing in Spearfish Canyon. Read MoreUPDATED INFORMATION: Temporary Closure Scheduled for Cliff Avenue at Interstate 229 in Sioux Falls
SIOUX FALLS, S.D. – On Friday, Jan. 9, 2026, South Cliff Avenue at Interstate 229 will be temporarily closed beginning at 9:30 a.m. as contractors remove a temporary bridge over Cliff Avenue. Weather permitting, the work is expected to be completed in one hour. During the closure, drivers should use exits 3 (Minnesota Avenue) and 5 (East 26th Street) as detour routes. Read MoreSouth Dakota Transportation Commission Awards Economic Development Grants
At the South Dakota Transportation Commission meeting held on Thursday, Dec. 18, 2025, commissioners awarded $4 million in economic development grants for infrastructure improvements to counties and smaller communities across South Dakota. Read MoreFeatured Resources
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Meetings & Events
Railroad Board & Authority Meeting 01/21/2026
1/21/2026 10:00 AM MT / 11:00 AM CT
The agenda and corresponding attachments for the meeting, as well as additional information about the Board, can be found here Boards and Commissions.
View DetailsTransportation Commission Meeting 01/29/2026
1/29/2026 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 DetailsTransportation Commission Meeting 02/12/2026
2/12/2026 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 DetailsRailroad Board & Authority 02/18/2026
2/18/2026 10:00 AM MT / 11:00 AM CT
The agenda and corresponding attachments for the meeting, as well as additional information about the Board, can be found here Boards and Commissions.
View Details