41st Street and Marion Road
41st Street and I-29
41st Street and Marion Road
41st Street and I-29
Traffic Alerts
December 7, 2022
41st Street, Marion Road to I-29
Phase 1 construction of the 41st Street Diverging Diamond Interchange (DDI) project is complete. This project is nearly ten years in the making, as SDDOT and the City of Sioux Falls made plans to improve safety and enhance traffic operations in this area. The DDI was chosen because of its safety features, greater capacity, and efficiency that it provides for the traveling public. It reduces the conflict of left-hand turn movements and meets the needs of all road users to accommodate large trucks, pedestrians, and bicyclists. Construction is scheduled to span from 2022 to 2024. Each year segmented its own phase of work.
In April 2022, Phase 1 construction of the project began. During Phase 1, a portion of 41st Street from Marion Road to Meadow Avenue underwent a series of upgrades and transformations that included:
- Adding traffic lanes
- Repaving traffic lanes
- Updating underground utilities
- Adding new sidewalks and accessible curb ramps
- Installing new traffic signals and streetlights
- Reinforcing the girders of the 41st Street bridge
- Building retaining walls for southbound Interstate 29 on and off ramps
As construction work winds down for the winter, 41st Street is now fully reopened to motorists, but pedestrian traffic will still be limited to the south side of 41st Street when crossing Interstate 29. Pedestrians will need to cross to the south side of 41st Street, at either of the signalized intersections at Marion Road or Terry Avenue, as the sidewalks along the north side of the street east of Meadow Avenue will remain closed.
Phase 2
Spring 2023
Work on Phase 2 will begin in spring 2023, where crews will focus on the DDI bridge structure and updates to 41st Street from Carolyn Avenue to Shirley Avenue. During this time, there will be lane closures, but at least one lane of traffic will be open in each direction along 41st Street. Updates to be completed in Phase 2 include:
- Updating and adding underground utilities
- Installing new traffic signals and streetlights
- Installing new medians
- Adding new sidewalks and accessible curb ramps
The diverging diamond and construction along 41st Street is expected to finish around November 2023. This will allow the crew to focus on clean-up, finishing touches, and restoration in the spring of 2024.
While most of the construction is on hold for the winter, traffic signal work will continue at the Terry Avenue and 41st Street and the Shirley Avenue and 38th Street intersections. During this time the project’s bi-weekly newsletters and website project updates will be paused. Project announcements will be made as needed and regularly scheduled updates will resume in the spring, with the start of Phase 2 of construction.
Construction Progress
Construction began in early 2022 and is anticipated to be completed in summer 2024. The project is divided into two phases: west and east. The west half of the project area includes 41st Street from Marion Road to Meadow Avenue. The east half includes 41st Street from Meadow Avenue to Shirley Avenue.
Click or tap on the dots to see more detail about a particular area.


South Side of 41st Street West of I-29 (2022)
Construction is complete on the south side of 41st Street west of I-29.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted

Marion Road South of 41st Street (2022)
Construction is complete on Marion Road south of 41st Street.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted

North Side of 41st Street West of I-29 (2022)
Construction is complete on the north side of 41st Street west of I-29.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted

Marion Road North of 41st Street (2022)
Construction is complete on Marion Road north of 41st Street.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted
South Side of 41st Street East of I-29 (2023)
Construction has not started on the south side of 41st Street east of I-29.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted
North Side of 41st Street East of I-29 (2023)
Construction has not started on the north side of 41st Street east of I-29.
-
Removals
In ProgressCompleted -
Sanitary Sewer
In ProgressCompleted -
Water Main
In ProgressCompleted -
Drainage
In ProgressCompleted -
Grading
In ProgressCompleted -
Gravel
In ProgressCompleted -
Concrete Paving
In ProgressCompleted -
Misc Concrete
In ProgressCompleted -
Restoration
In ProgressCompleted
Signal and Sidewalk at 38th St.
Construction is underway at the intersection of 38th Street and Shirley Avenue.
-
Removals
In ProgressCompleted -
Electric
In ProgressCompleted -
Sidewalk
In ProgressCompleted -
Traffic Signal
In ProgressCompleted -
Restoration
In ProgressCompleted
I-29 Interchange Bridge Work (2022-2023)
Construction is underway on the I-29 bridge and interchange.
-
Girders
In ProgressCompleted -
Southside Removals
In ProgressCompleted -
Southside Rehab & New Construction
In ProgressCompleted -
Northside Removals
In ProgressCompleted -
Northside Rehab & New Construction
In ProgressCompleted -
Electrical
In ProgressCompleted -
Closure Pour
In ProgressCompleted -
Barriers
In ProgressCompleted -
Restoration
In ProgressCompleted
I-29 Southbound Interchange Work (2022-2023)
Construction is underway on the I-29 interchange.
-
Removals
In ProgressCompleted -
Drainage & Sanitary Improvements
In ProgressCompleted -
Retaining Walls
In ProgressCompleted -
Winterize
In ProgressCompleted -
Removals
In ProgressCompleted -
West 41st off Ramp & I-29 West on Ramp
In ProgressCompleted -
Drainage & Sanitary Improvements
In ProgressCompleted -
East 41st St off Ramp & I-29 East on Ramp
In ProgressCompleted -
Electrical
In ProgressCompleted -
Medians
In ProgressCompleted -
Restoration
In ProgressCompleted
I-29 Northbound Interchange Work (2023)
Construction has not started on the I-29 interchange.
-
Removals
In ProgressCompleted -
Drainage & Sanitary Improvements
In ProgressCompleted -
Retaining Walls
In ProgressCompleted -
East 41st St off Ramp & I-29 East on Ramp
In ProgressCompleted -
West 41st St off Ramp & I-29 West on Ramp
In ProgressCompleted -
Electrical
In ProgressCompleted -
Medians
In ProgressCompleted -
Restoration
In ProgressCompleted
-
April - November 2022
41st Street construction from Marion Road to Meadow Avenue (west half of project area)
-
April - November 2023
41st Street construction from Meadow Avenue to Shirley Avenue (east half of project area)
-
April - June 2024
Finishing touches and clean-up; complete construction