Beverly Krier of Weeping Water was taken to the Nebraska Medical Center after the crash, which occurred before 3:15 p.m. Wednesday, the Cass County Sheriff's Office said. The driver of the truck, Christopher Stickler, 44, of Louisville, was not injured. 

Investigators determined that Krier was northbound on Nebraska Highway 50 in a Chrysler 200 sedan when her vehicle struck the rear of a sand and gravel truck. The truck was slowing to turn off the highway into Westover Rock & Sand. 

Both drivers were wearing seat belts, officials said. Highway 50 first was closed in both directions and then reduced to one lane during the crash investigation.