Failing to yield to thru traffic resulted in an accident in Cass County Thursday afternoon. According to the patrol report, Laura Williams-Lagrone, 16, of Harrisonville was Northbound at Highway 2 and Blinker Light Road, when she pulled into the path of Kathryn Yoder, 17, also of Harrisonville. Lagrone received serious injuries and her passenger, Kyleigh Williams, 2, of Garden City received moderate injuries. Lagrone was flown to Research Hospital and the toddler was transported to Children’s Mercy.