Interstate 29 and 85th Street Interchange in Sioux Falls

Project Summary:

The project includes construction of a Diverging Diamond Interchange (DDI), structure development work, grading, concrete surfacing, curb and gutter, storm sewer, lighting, signals, permanent signing, and pavement marking.

Travel Impacts: Interstate traffic will be reduced to a single lane while operations are being conducted adjacent to the Interstate 29 lanes. Traffic control measures will be in place to help guide motorists through the work zone. 

Business Access: Access will be maintained at 85th Street and Sundowner Avenue and Tall Grass Avenue.

Sign Up for Text Notifications:

For updates on MAJOR traffic changes, subscribe to a free text-in service. To subscribe, simply text the keyword listed below to 605-566-4041. Subscribers can unsubscribe at any time. 

Text 85thStreetDDI to 605-566-4041 

Project Updates:

Coming Soon

View 85th Street updates on the City of Sioux Falls website: I-29 & 85th Street Interchange - City of Sioux Falls

Project Photos:

I29 & 85th Street Illustrations

85th & I-29 Interchange Overhead View Rendering

STATEWIDE CONSTRUCTION PROJECTS PAGE

PCN: 06JQ & 07D0