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Special Studies
Special Studies
Final Reports of Completed Studies
Statewide Studies
- SDDOT Long Range Plan
- SDDOT Intersection Safety Study
- Interstate Rest Area Investment Study FINAL Report September 2014
- Major Bridge Investment Study
- 2018 Interstate Truck Parking Study
- Electric Vehicle Fast Charging Plan
- South Dakota Freight Plan
- South Dakota Carbon Reduction Strategy
Expressway Feasibility Studies
- Eastern Dakota and Pierre to I-90 Expressway Executive Summary
- Eastern Dakota and Pierre to I-90 Expressway Feasibility Complete Study
- Heartland Expressway Complete Study
- Heartland Expressway Executive Summary
Interchange Justification Studies
- I-29 Exit 1 (Dakota Dunes)
- I-29, Exit 62 (US18 / Canton; Lincoln County)
- I-29, Exit 71 (Harrisburg)
- I-29, Exit 73 (Tea)
- I-29 Exit 74 / I-229 Exit 0 (85th Street; Sioux Falls/Tea)
- I-29 Exit 75 / I-229 Exit 1A and 1B (System Interchange; Sioux Falls)
- I-29 Exit 77 (41st Street; Sioux Falls)
- I-29, Exit 79 (SD42/12th Street; Sioux Falls)
- I-29, Exit 80 (Madison Street, Sioux Falls)
- I-29, Exit 82 (Benson Road, Sioux Falls)
- I-29, Exit 83 (SD38/60th Street North; Sioux Falls)
- I-29 Exit 83 (60th St. N.) Interchange Feasibility Study
- I-29 Exit 86 (Renner/Crooks; Minnehaha County)
- I-29, Exit 98 (SD115 / Dell Rapids; Minnehaha County)
- I-29, Exit 130 (20th Street South; Brookings)
- I-90, Exit 14 (US14A / 27th Street, Spearfish)
- I-90, Exit 32 (Junction Avenue; Sturgis)
- I-90, Exit 34 (Black Hills National Cemetery, Meade County)
- I-90 Exit 37 (Pleasant Valley Road; Meade County)
- I-90 Exit 44 (Bethlehem Road; Meade County)
- I-90, Exit 46 (Elk Creek Road; Piedmont/Summerset
- I-90, Exit 51 (SD79/Sturgis Road; Black Hawk)
- I-90, Exit 59 (La Crosse Street; Rapid City)
- I-90, Exit 60 (US16 B/North Street; Rapid City)
- I-90, Exit 61 (SD437/Elk Vale Road; Rapid City)
- I-90, Exit 63 (Box Elder / Ellsworth AFB Commercial Gate)
- I-90 Exit 387 (Hartford)
- I-90 Exit 395 (Marion Road, Sioux Falls)
- I-90 Exit 396/I-29 Exit 84 (System Interchange; Sioux Falls)
- I-90 Exit 399 (Cliff Avenue, Sioux Falls)
- I-90 Exit 400/I-229 Exit 10 (System Interchange; Sioux Falls)
- I-90, Exit 402 (Timberline Road / EROS; Minnehaha County)
- I-90, Exit 406 (SD11 / Corson / Brandon; Brandon)
- I-190, Exit 1 (Silver Street; Rapid City)
- I-229, Exit 3 (Minnesota Avenue; Sioux Falls)
- I-229, Exit 4 (Cliff Avenue; Sioux Falls)
- I-229, Exit 5 (26th Street; Sioux Falls)
- I-229 Exit 6 (10th Street)
- I-229, Exit 9 (Benson Road; Sioux Falls)
Corridor Studies
Decennial Studies:
- 2000 Interstate Corridor Study Phase I Final Report (14MB)
- 2000 Interstate Corridor Study Phase II Final Report (32MB)
- 2010 Decennial Interstate Corridor Study Phase 1 Final Report (16MB)
- 2010 Decennial Interstate Corridor Study Phase 2 Final Report (12MB
- 2010 Decennial Interstate Corridor Study Phase 3 Final Report (10MB)
- 2020 Decennial Interstate Corridor Study Phase 1 Report
- 2020 Decennial Interstate Corridor Study Phase 2 Report
- 2020 Decennial Interstate Corridor Study Phase 3 Report
Local Studies: - Box Elder – Highway 1416 / Radar Hill Road
- Sturgis – Junction Avenue Corridor Study
- Spearfish - Colorado Boulevard Corridor Study
Interstate Studies:
- I-29 Exit 62 to Exit 73 Corridor Study
- I-29 Corridor: Exit 73 (Tea) to Exit 77 (41st St.) (13MB)
- I-29 Exit 77 (41st Street) Crossroad Corridor Study
- I-229 Major Investment Corridor Study
- I-229 Mainline / Overall Corridor Final Report
- I-229 Exit 3 (Minnesota Avenue) Final Report
- I-229 Exit 4 (Cliff Avenue) Final Report
- I-229 Exit 6 (10th Street) Final Report
- I-229 Exit 7 (Rice Street) Final Report
- I-229 Exit 9 (Benson Road) Final Report
- I-90 Black Hawk-Sturgis Corridor Preservation Study (51 MG)
- I-90 Exit 61-67 Corridor Study
- I-90 Exit 32 to 40 Corridor Study
- I-190 Corridor / Silver Street Interchange Study in Rapid City
- I-90/US85 Spearfish Rest Area/Welcome Center Corridor Study
Highway Studies:
- S.D. 11 Corridor Study
- U.S. 12 Ipswich to Aberdeen Corridor Study
- U.S. 14B Railroad Crossing with DM&E Railroad
- U.S.14 – US14 Bypass Corridor Study (West Brookings County)
- U.S. 14/U.S. 83/S.D. 34 Missouri River Bridge Replacement Study
- U.S. 14 / U.S. 83 Euclid Avenue in Pierre
- U.S. Highway 14A (Colorado Boulevard) Corridor Study Including I-90 Exit 14 in Spearfish
- U.S.16 Corridor Study
- U.S. 16 Rural SubArea Analysis
- U.S. 16 - U.S. 16B Intersection Study
- U.S.16 (Mount Rushmore Road/8th Street) Corridor Study through Rapid City
- S.D. 42 Corridor Study (MRM373 to Iowa state line) (35 MG)
- S.D. 42 Western Minnehaha County Corridor Study
- West 12th Street Transportation Study (SD42) (17 MG)
- S.D. 44 / Platte-Winner Bridge Corridor Study
- S.D. 100 / Veterans Parkway Corridor
- Black Hills Context Sensitive Corridors Study – Phase 1 & 2
- Pierre Railroad Crossings with DM&E Railroad
- US14A/SD34 (Lazelle Street) Corridor Study
- Northern Lincoln County Corridors (SD11 & SD115) Study
Area Studies
SPR for Locals Program →- Aberdeen Master Transportation Plan
- Aberdeen Multi-Use Trails Plan
- Beadle County Master Transportation Plan
- Brookings Area Master Transportation Plan
- Brookings County Master Transportation Plan
- Brown County Master Transportation Plan
- Codington County Master Transportation Plan
- Clay County Master Transportation Plan
- Custer County Master Transportation Plan
- Dakota Dunes North Sioux City Traffic Study
- Davison County Master Transportation Plan
- Deadwood Pedestrian Circulation & Enhancement Study
- Dell Rapids Master Transportation Plan
- Faulkton Master Transportation Plan
- Gregory (City) Master Transportation Plan
- Herreid Master Transportation Plan Study
- Hill City Master Transportation Plan
- Hughes County Master Transportation Plan
- Lawrence County Master Transportation Plan
- Lincoln County Master Transportation Plan
- Maple/Park Street Corridor Study
- McCook County Master Transportation Plan
- Meade County Transportation Plan
- Mitchell Master Transportation Plan
- Northeast Pierre Transportation Plan Study
- Pennington County Master Transportation Plan
- Spearfish Area Master Transportation Plan (54 MB)
- Union County Master Transportation Plan
- Vermillion Area Master Transportation Plan
- Vermillion Bicycle Master Plan
- Wall Master Transportation Plan
- Walworth County Master Transportation Plan
- Watertown Area Transportation Plan
- West Yankton County Subarea Transportation Plan
- Yankton County Master Transportation Plan
Ongoing Studies
- I-229 Exit 6 (10th Street) Interchange Study →
- I-90 Exit 46 (Elk Creek Road) Interchange Modification Study
- U.S. Highway 14A/US85/Deadwood Box Corridor Study →
- South Veterans Parkway (Highway 100) →
- U.S. Highway 212/Forest City Bridge Corridor Study→
- I-29 Exit 71 (Harrisburg/Tea) Interchange Study→
- I-29 Exit 86 (Renner-Crooks) Interchange Study→
- I-29 Exit 133 (US14 Bypass/Brookings) Interchange Study→
- I-29 Corridor in the Sioux City MPO Study→
- Tabor to Platte Rail to Trail Feasibility Study→
- I-90 Local Road Crossings Study→
- Lawrence County Master Transportation Study→
- Tripp County Master Transportation Study→
- Statewide Active Transportation Study (Available Soon)
- S.D. Highway 115 Corridor Study→
- Brookings Area Transportation Plan Update (Available Soon)
- Chamberlain Area Transportation Study (Available Soon)
- 10th & 11th Streets Viaduct Replacement Study→
- S.D. Highway 37 Corridor Study→
- 278th Street Corridor Study→
Statement of Interest
None at this time.
Studies without a link are available upon request from the planning squad leader below.
Contacts
Construction Projects
Planning
Carbon Reduction Strategy
Freight Plan
Long Range Plan
Metropolitan Planning Organization
Non-state Public Road Inventory
Pavement Condition Monitoring
Pavement Management
South Dakota EV Fast Charging Plan
Statewide Transportation Improvement Program – STIP
Transportation Asset Management Plan (TAMP)
Studies
Special Studies
Public Meetings
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
© 2025 State of South Dakota. All Rights Reserved.
South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
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© 2025 State of South Dakota. All Rights Reserved.
South Dakota Department of Transportation
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
Becker-Hansen Building
700 E. Broadway Ave.
Pierre, SD 57501
Powered by:
Modern Logic
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