None at this time

• US85 Corridor Study from Spearfish to Deadwood→
  

• I-90 Exit 48 (Stage Stop Road) Interchange Study→
  

• S.D. Highway 38 Corridor Study →

• US16 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. Highway 385, Pennington and Lawrence Counties
  
  
• US14A/US85/Deadwood Box Corridor Study →
  
  
• South Veterans Parkway (Highway 100) →
  
  
• US212/Forest City Bridge Corridor Study→
  

• I-29 Exit 71 (Harrisburg/Tea) Interchange Study→
  
  
• Northern Lincoln County Corridors (SD11 & SD115) Study→
  
  
• I-29 Exit 86 (Renner-Crooks) Interchange Study→
  
  
• I-29 Exit 133 (US14 Bypass/Brookings) Interchange Study→
  
  
• Spearfish – Colorado Boulevard Corridor Study→
  
  
• I-29 Corridor in the Sioux City MPO Study→
  
  
• Lincoln County Highway 106 Corridor Study→

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

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 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 98 (SD115 / Dell Rapids; Minnehaha County) 
• I-29, Exit 130 (20^th 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 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:
  
• Sturgis – Junction Avenue 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
• US14 – US14 Bypass Corridor Study (West Brookings County)
• U.S. 14/U.S. 83/S.D. 34 Missouri River Bridge Replacement Study
• U.S. 14 / US 83 Euclid Avenue in Pierre
• U.S. Highway 14A (Colorado Boulevard) Corridor Study Including I-90 Exit 14 in Spearfish
• US16 Corridor Study
• U.S. 16 - U.S. 16B Intersection Study
• US16 (Mount Rushmore Road/8th Street) Corridor Study through Rapid City

• Final Report
• Traffic Study
• Land Use Maps
• Public Comments

• 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
  
  • Phase 3, Corridor 2: US14A – Spearfish Canyon South
  • Phase 3, Corridor 3: US85 – Wyoming to US14A
  • Phase 3, Corridor 4: US85 – West of Pluma
  • Phase 3, Corridor 5: SD473 – Nevada Gulch Road
  • Phase 3, Corridor 7: US16A – Custer State Park
• Pierre Railroad Crossings with DM&E Railroad
• US14A/SD34 (Lazelle Street) Corridor Study

Area Studies

• 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
• 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
• Yankton County Master Transportation Plan