One driver escaped injury when another motorist fired a handgun into his car Friday on Interstate 24, Rutherford County Sheriff’s deputies said.In unrelated cases, another driver reported someone shot out her driver’s side window in a shooting Saturday on Interstate 840 and a commercial tractor-trailer driver reported another driver pointed a handgun at him Monday while traveling on I-24 near the Buchanan Road exit.Detectives are investigating these cases and two other shootings on R .