Dallas (WBAP/KLIF) – A Highway Patrol trooper was rammed from behind early Saturday morning on the Dallas North Tollway. He was driving in the southbound center lane near the Briargrove overpass a minute or two before 3:00 AM when a car coming up quickly behind him crashed into his marked patrol car. Neither the trooper nor the driver of the car that hit him was seriously injured, however that other driver was arrested for D.W.I.