SIOUX FALLS — As of Aug. 19, a lane closure is in effect for the outside, southbound lane at Cliff Avenue between the Interstate 229 (exit 4) southbound on-ramp and northbound off-ramp. Crews are installing a retaining wall for the I-229 temporary bridge. Weather dependent, the lane will be reopened Aug. 23.

Motorists should be prepared for delays and use alternate routes during peak travel times through the I-229 and Cliff Avenue construction project.

Drivers are urged to use caution and reduce their speed while traveling through the area. Traffic control measures will continue to guide motorists around all closures.