NCDOT is responsible for controlling the erection and maintenance of outdoor advertising signs adjacent to the interstate and federal-aid primary highways. Static and digital billboards in North Carolina are typically found on highways, interstates and surface streets that serve large cities and small towns.Reach a larger audience in Wilmington with outdoor advertising, including bulletins, digital billboards, posters and more. Grow your business with our outdoor advertising products including print and digital billboards, airport displays, transit and highway signs, and more. Important Notice: Advertising and Promotional Direct Mail and Other Direct Mail Sourcing. Find television ad space in Raleigh gyms, restaurants, retail stores, doctors offices and more. Compare prices and book ad spaces online!