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SDDOT / Project Development / Planning / Special Studies REQUESTS FOR PROPOSALS I-90 Exit 59 (La Crosse Street) Interchange Options Study WEBSITE LINKS TO ONGOING STUDIES I-190 Corridor / Silver Street Interchange Study in Rapid City US14A (Colorado Boulevard) through Spearfish US16 / US16B Intersection Study I-29 Exit 77 (41st Street) Crossroad Corridor Study South Dakota 100 Corridor Preservation Project Brown County Master Transportation Plan Study Pennington County Master Transportation Plan Study Vermillion Area Master Transportation Plan Study FINAL REPORTS OF COMPLETED STUDIES (Adobe PDF Format) Statewide Studies SDDOT Long Range 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 73 (Tea) 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-90, Exit 32 (Junction Avenue; Sturgis) I-90, Exit 51 (SD79/Sturgis Road; Black Hawk) I-90, Exit 60 (US16 B/North Street; Rapid City) I-90, Exit 61 (SD437/Elk Vale Road; Rapid City) 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) Corridor Studies 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) 2000 Interstate Corridor Study Phase I Final Report (14MB) 2000 Interstate Corridor Study Phase II Final Report (32MB) US16 Corridor Study US16 (Mount Rushmore Road/8th Street) Corridor Study through Rapid City West 12th Street Transportation Study (SD42) (17 MG) SD42 Corridor Study (MRM373 to Iowa state line) (35 MG) Eglin Street Corridor Study (SD230) (9 MG) I-90 Black Hawk-Sturgis Corridor Preservation Study (51 MG) SD11/PreDesign Report (Harrisburg Corner to 57th St. & SD42 to Aspen Blvd.) Eastside Corridor Study (SD11) I-29 Corridor: Exit 73 (Tea) to Exit 77 (41st St.) (13MB) Area Studies Brookings Area Master Transportation Plan Deadwood Pedestrian Circulation & Enhancement Study Meade County Transportation Plan Spearfish Area Master Transportation Plan (54 MB) Watertown Area Transportation Study Access Plans SD11/Splitrock Boulevard Access Plan (Brandon) US14 B/Garfield Avenue Access Plan (Pierre) SD17/SD44 Access Plan (Lincoln & Minnehaha Counties) Studies without a link are available upon request from Jerry Ortbahn by phone: (605) 773-3281 or email; or Steve Gramm at (605) 773-6641 or email.

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