Deteriorating pavement and functionally obsolete structures, both of which impact safety for drivers, prompted SDDOT to tackle the reconstruction of the I-29/I-229 interchange in Sioux Falls. About 45,000 vehicles use this interchange each day, though projections show that this number could be 65,000 by 2040, so minimal disruption was important during the reconstruction. SDDOT maintained traffic for the duration of construction with very little disruption by using additional temporary lanes and a temporary bridge. The project utilized stringless paving and Next Generation Concrete Surfacing and the old concrete was recycled for use on the project. Completed in November 2016, the project has improved safety for drivers and upgraded the interchange for future growth.
America's Transportation Awards 