A Johnston City woman was seriously injured in a one-car accident Tuesday. It happened around 1 a.m. on Herrin Road near the I-57 overpass. Williamson County sheriff’s officials say 19 year old Abigail Moore was driving a convertible east on Herrin Road when the vehicle left the roadway and flipped several times. Moore was not wearing her seatbelt and was thrown from the car. She was flown to a St. Louis hospital.