discussed Cited "see, e.g." National Advertising Company v. City of Raleigh, North Carolina, Southern Environmental Law Center, Amicus Curiae Compare National Advertising Co. v. Bradshaw, 48 N.C.App. 10 , 268 S.E.2d 816 , appeal dismissed, 301 N.C. 400 , 273 S.E.2d 446 (1980) (holding illegal National’s reconstruction of sign deemed nonconforming under state statute and located along federal highway system where sign was more than 50 percent destroyed by wind). 9 .