Authorities say a two-vehicle crash near Wessington left a road construction worker dead.
It happened Tuesday afternoon on U.S. Highway 14.
The Highway Patrol said a flagger was directing traffic when a truck crashed into a pickup that had stopped due to construction. The truck then struck the flagger, fatally injuring her.
Troopers identified the flagger as a 44-year-old woman.
The drivers of the two vehicles involved received minor injuries.