The final construction phase will begin Monday on the three-year project to convert the 41st Street bridge at the Interstate 29 intersection into a Diverging Diamond interchange. Commuters are asked to use caution and reduce their speed while traveling through the construction area.

41st Street DDI Project Begins Final Construction Phase in Sioux Falls

On the eve of Spring 2024 construction is set to resume on one of the busiest crossroads in Sioux Falls. The third phase of construction at 41st Street and Interstate 29 begins Monday, March 18.

The Diverging Diamond Interchange (DDI) project began in 2022 and is anticipated to be completed this summer.


As this project comes to a close the South Dakota Department of Transportation Department will focus on finishing touches, site clean-up, and transitioning the intersection into an operational DDI.

KXRB logo
Get our free mobile app

Starting Monday, March 18 traffic will shift to one lane in each direction on the south side of 41st Street from Terry Avenue to the east side of the bridge. This will allow crews to work on updates to the north side of the bridge. Once the bridge work has been completed, crews will focus on building the first island near the southbound off-ramp.


The SDDOT has made it easy for you to be informed by tapping into the free text-in service. To subscribe, simply text “41stDDI” to 605-566-4041.

Drove Video

Project Resources

Need the latest updates on road and weather conditions, road closures, construction work zones, commercial vehicle restrictions, and traffic incidents? Visit or dial 511.

The 6 Types of South Dakota Drivers You Deal With Every Winter

Every year it snows in Sioux Falls. We may live in denial during the spring and summer, but it happens.

When the snow falls on the Falls, life in the city does not stop. We all still have to go to work, school, and the liquor I mean go get snacks.

When you tackle the snowy routes around town you tend to run across six types of drivers in the snow.

20 Classic Cars From 20 Classic Movies

Cars & Movies

Gallery Credit: Dave Roberts

LOOK: Most commonly seen birds in South Dakota

Stacker compiled a list of the most common birds seen in South Dakota from Project FeederWatch.

Gallery Credit: Stacker

More From KXRB