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Traffic slowing down ahead of yearslong viaduct makeover in downtown Sioux Falls

Research into driver behavior will inform new road network design as part of South Dakota DOT, city of Sioux Falls project that’ll bring years of traffic disruption

Jacob Brende's avatar
Jacob Brende
Jun 29, 2026
∙ Paid
Planters and reflective markers are blocking off some parking spaces as part of a study of traffic patterns in downtown Sioux Falls. (Jacob Brende / The Dakota Scout)

Deliberately slowed rush-hour traffic in downtown Sioux Falls is serving as a preview for commuters ahead of a major, yearslong overhaul of the city’s aging viaduct overpasses.

And Downtown Sioux Falls Inc. is using the opportunity to study traffic patterns in advance of the reconstruction of the 10th and 11th street overpasses on the east end of the core commercial district. Though the state-led project is still years away, the temporary traffic-calming measures are helping engineers gather data on vehicle speeds, volumes and behaviors.

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Jacob Brende's avatar
A guest post by
Jacob Brende
Senior journalism student at South Dakota State University. On the side I love music, studying philosophy and hanging out with my animals!
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