Construction Alert: Cliff Avenue Fully Closed at I-229

If you're planning to drive around Cliff Ave. and I-229 in Sioux Falls, you'll want to make different plans.

A major section of Cliff Avenue is now completely closed as crews continue work on the Interstate 229 reconstruction project.

The closure affects Cliff Avenue between the southbound Interstate 229 on/off-ramps and the Spencer Park Access Road. It began at 6:00 a.m. on Thursday, July 16, 2026, and, weather permitting, is expected to remain in effect until noon on Saturday, July 18, 2026.

According to project officials, the temporary closure is necessary to allow crews to safely continue reconstruction work and place bridge girders at I-229 Exit 4.

Drivers should expect detours and allow extra travel time, especially during peak commuting hours.

There's another traffic restriction to be aware of on the south side of Sioux Falls.

The outside southbound lane of South Cliff Avenue between East 77th Street and Veterans Parkway is currently restricted while utility work is underway.

In addition, the west sidewalk in that area has been closed to pedestrians during construction.

Motorists are encouraged to slow down in work zones, watch for construction crews and equipment, and follow all posted detour signs. Taking an alternate route could help avoid delays while this important infrastructure project moves forward.