Katie Good, 18, Diamond Day, 20, and Mary Grosvenor, 19, killed in single-vehicle crash on Interstate Highway 80 in Fairfield, California

Day was driving a Hyundai Elantra sedan at a very high rate of speed east on Interstate Highway 80 when the car clipped a guardrail, overturned and struck a large support pillar of the state Highway 12 overcrossing, California Highway Patrol Officer David Harvey said.