Benson Road and Interstate 229

Project Summary:

Widening Ramps and converting interchange to a diverging diamond interchange.

View more information on the City of Sioux Falls website

Project Timeline:

April 3, 2023 - Substantial Completion 2024

Project Updates: 

Nov. 27, 2023:

November Completed Work: The contractor has fully opened the Benson Road and Interstate 229 project to traffic. The westbound traffic is driving on the newly constructed Benson Road. The eastbound traffic is driving on the old Benson Road section that will be constructed in 2024. 


Sept. 26, 2023:

A $34.3 million reconstruction project on Benson Road and the Interstate 229 interchange is unfolding in Sioux Falls, S.D. The undertaking, a combined effort by the South Dakota Department of Transportation (SDDOT) and the city of Sioux Falls, includes construction of a diverging diamond interchange (DDI), structure development work and road widening. Read the full article here.


Project Photos:


Project Contract Amount:

$34.3 Million


Project Contacts:

T&R Contracting
Connor Christensen

The SDDOT Project Engineer:
Steven Neumeister  605-367-5680



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