Interstate 229 Exit 4 - Cliff Ave Reconstruction
Project Summary:
Years Two and Three: The project includes the reconstruction of exit 4 (Cliff Avenue) with added lighting, signals, and mainline Interstate work. The Interchange will be reconstructed as a Single Point Urban Interchange. This project includes two structure replacements. 41st Street will be realigned to intersect with the Lincoln High School entrance. Traffic signals will be added to the intersection of Cliff Avenue & 38th Street. Pedestrian mobility will be improved with a new trail, sidewalk, and access tunnels. The southbound I-229 lanes and structure will be constructed in 2025 and the northbound I-229 lanes and structure will be constructed in 2026.
Year One: This project includes the modification of the median crossovers with a temporary structure in preparation for the 2025 interchange reconstruction. This project also includes the temporary widening of Interstate 229 northbound.
Find information on the project study here: https://www.i229exits3and4.com/
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Detour Route:
Project Updates:
Feb. 12, 2026:
Lane Closures Scheduled for Interstate 229 (Cliff Avenue to Minnesota Avenue) in Sioux Falls.
On Thursday, Feb. 19, lane closures will be in place from 8:30 a.m. to 4:30 p.m. for the southbound inside lane and auxiliary lane on Interstate 229 between exit 4 (Cliff Avenue) and exit 3 (Minnesota Avenue).
The lane closures are being placed as a contractor continues signage installation. Motorists are reminded to use caution and reduce their speed while workers and equipment are present.