Interstate 229 Northbound Temporary Lane Closure Scheduled at Cliff Avenue (Exit 4) in Sioux Falls

For Immediate Release:
Tuesday, Sept. 16, 2025

Contact:
Mike Schmidt, Project Engineer, 605-940-1000

SIOUX FALLS, S.D. – Beginning at 7 p.m. on Tuesday, Sept. 23, 2025, the northbound lanes of Interstate 229 will be temporarily closed. Traffic will be diverted onto the on- and off-ramps at Cliff Avenue (exit 4). This three-hour traffic diversion will be maintained until approximately 10 p.m. while maintenance crews repair asphalt on I-229 at the temporary bridge. 

During this timeframe, traffic on Cliff Avenue will be closed from the northbound on - and off-ramps to 41^st Street. Northbound traffic on Cliff Avenue will be detoured onto the northbound on-ramp. Southbound traffic on Cliff Avenue will be detoured onto 41^st Street. Travelers are advised to use 26^th Street (exit 5) and Minnesota Avenue (exit 3) as alternate routes during the temporary closure.

The date for this traffic diversion is weather dependent and may be rescheduled as needed.

Featured Project Information:
Find additional information about this project on the SDDOT website at https://dot.sd.gov/i229exit4.

Sign Up for Text Notifications: 
For updates on MAJOR traffic changes on this reconstruction project, subscribe to a free text-in service. To subscribe, simply text "I229Exit4" to 605-566-4041. Subscribers can unsubscribe at any time.  

About SDDOT:
The mission of the South Dakota Department of Transportation is to provide a safe and efficient public transportation system.

For the latest on road and weather conditions, road closures, construction work zones, commercial vehicle restrictions, and traffic incidents, please visit https://sd511.org or dial 511.

Read more about the innovative work of the SDDOT at https://dot.sd.gov.

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