Diverging diamond interchanges (DDI) reduce crashes and improve traffic flow compared to traditional intersections. Crashes were reduced by 58% in Rapid City and 73% in Sioux Falls in the months after the diverging diamonds opened. Diverging diamonds send vehicles to the left side of the road, allowing exits onto the interstate without left-hand turns across traffic. Diverging diamonds have 14. SourcesMissouri Department of Transportation, Diverging diamond interchangesKELO-TV, Fewer crashes at SD diverging diamond interchangesSnyder & Associates law firm, Safety improvements of a diverging diamond interchangeSouth Dakota News Watch partners with Gigafact to publish fact briefs that refute or confirm a claim with supporting information and additional evidence and context.