Baltimore County police said a pedestrian was struck and killed while walking along the Baltimore National Pike Friday night.Officers said the pedestrian was hit by a car traveling eastbound on Baltimore National Pike near Rolling Road in Catonsville just after 11 p.m.The man, who has not yet been identified, was not in a crosswalk, police said.The pedestrian was transported to Saint Agnes Hospital in Baltimore where he was pronounced dead, police said.Baltimore County police said this incident is under investigation.