One of the several construction projects on Interstate 229 in Sioux Falls is about to impact access to the roadway.

Beginning Monday (May 20), the South Dakota Department of Transportation is shutting down the southbound on-ramp at Benson Road. The work is part of the Diverging Diamond Interchange (DDI) construction project.

The closure will allow crews to install, grading, and concrete surfacing.

The ramp is expected to reopen Monday, July 1.

During the month-long closure, I-229 on-ramp traffic will be detoured to Rice Street via Benson Road and Rice Street.

I-229/Benson Rd Construction
Google Maps

The DDI project will reconstruct approximately one and one-half mile of Benson Road and a mile of I-229 ramps. Work includes construction of a DDI, constructing a structure, grading, concrete surfacing, curb and gutter, storm sewer, lighting, signals, permanent signing, and pavement marking.

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The $34.3 million project is scheduled to be completed in late June of 2025.

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