(By Ely Portillo, elyportillo@charlotteobserver.com) An underage woman already awaiting trial on DWI charges was charged again with driving while intoxicated early Sunday after the car she was driving hit three pedestrians crossing the street in the Elizabeth neighborhood, Charlotte-Mecklenburg police said.Investigators said Kirstie Pienta, 19, struck the pedestrians at about 2 a.m.