South DakotaDepartment of Transportation

I-229 Exit 6 (10th Street) Interchange Study

I-229 Exit 6 (10th Street) Interchange Study

https://www.i229exit6.com/

Planning Studies

Special Studies

SPR US Highway 16 Corridor Study I-229 Exit 3 (Minnesota Avenue) and Exit 4 (Cliff Avenue) Interchange & Environmental Study I-229 Exit 6 (10th Street) Interchange Study SD44 - Platte/Winner Bridge Corridor Study I-90 Exit 46 (Elk Creek Road) Interchange Modification Study I-90 Exit 63 (Box Elder/Ellsworth AFB Commercial Gate) Interchange Study U.S. 385 Roadway Improvement Study SD 100 Corridor Preservation Project US14A/US85/Deadwood Box Corridor Study South Veterans Parkway (Highway 100) US Highway 212/Forest City Bridge Corridor Study Union County Master Transportation Plan Study Tabor to Platte Rail to Trail Feasibility Study Ethan Master Transportation Plan Study Dimock Master Transportation Plan Study Sioux Falls Railroad Corridor Analysis and Crossing Safety Study

Public Meetings

Talk to Us

© 2026 State of South Dakota. All Rights Reserved.

South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501

605-773-3265 (voice) 605-773-6214 (fax) Contact Us

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Region & Area Offices

Region & Area Offices

Region and Area Offices Aberdeen Mitchell Pierre Rapid City Maintenance Unit Map (Region/Area)

DOT Intranet

Request Public Records
State of SD Home Page

Travelers

Travelers

Bicycle/Pedestrian Rest Area/Ports of Entry Road Construction/Travel Conditions Spring Load Restrictions Sturgis Rally Travel Information FAQ Truckers Winter Travel Alerts & Road Condition Information

Forms & Publications

Forms & Publications

Brochures Forms Manuals Maps Newsletters Reports

© 2026 State of South Dakota. All Rights Reserved.

South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501

605-773-3265 (voice) 605-773-6214 (fax) Contact Us

Powered by:
Modern Logic