N.C. Gen. Stat. § 136-139: Alternate control.

In addition to any other control provided for in this Article, the Department of Transportation may regulate outdoor advertising in accordance with the standards provided by this Article and regulations promulgated pursuant thereto, by the acquisition by purchase, gift, or condemnation of easements or any other interests in real property prohibiting or controlling the erection and maintenance of advertising within 660 feet of the right-of-way line of the interstate and primary system of the State. (1967, c. 1248, s. 14; 1973, c. 507, s. 5; 1977, c. 464, s. 7.1.)