dot.sd.gov
I-29 Exit 133 Interchange Interchange Modification Study
The South Dakota Department of Transportation (SDDOT), in conjunction with the City of Brookings, is conducting an Interchange Modification Study of Exit 133 on Interstate 29. This interchange provides access to the U.S. Highway 14 Bypass.
About
Due to increasing traffic and anticipated development along the U.S. Highway 14 Bypass, SDDOT plans to reconstruct the Interstate 29 Exit 133 interchange and a portion of the Highway 14 Bypass through the interchange as part of a planned project beginning in Fiscal Year 2029.
The 2020 Highway 14 – Highway 14 Bypass Corridor Study recommended that variations of a Modified Diamond Interchange be carried forward to this Interchange Modification Study for further refinement and evaluation. A Modified Diamond Interchange is very similar to the current interchange layout. However, the northbound off-ramp and on-ramp are shifted west to increase spacing between the northbound ramp terminal intersection and the 32nd Avenue intersection.
This study will determine the type and configuration of the future I-29 Exit 133 interchange, the number of lanes on the U.S. 14 Bypass reconstruction for the planned project.
Modified Diamond Interchange Alternatives from U.S. 14 – U.S. 14 Bypass Corridor Study
Multi-lane
Three-lane
Alternatives will be refined as part of this study.
Study Area Map
Click below to enlarge the Study
Area Map.
Schedule
Click below to enlarge the Schedule.
Get In Touch
Submit comments and questions to the project team using this form:
Steven Gramm (SDDOT)
SDDOT Planning Squad Leader
605-773-3281
steve.gramm@state.sd.us
Jon Wiegand (HDR)
Consultant Project Manager
605-782-8105
jonathan.wiegand@hdrinc.com
Rich Uckert (Banner Associates)
Survey, Utilities, and Local Streets
605-692-6342
richu@bannerassociates.com
Archive
Public Meeting Open House
The DOT has held two public open house meetings for this project. These events were used to share project updates and receive feedback from the community. The first one was held in March 2023 and the second in November 2023. Below you can review the materials from both of these public open house meetings.