HWY AD CONTROL ACT-DEFINITIONS

Amends the Highway Advertising Control Act of 1971. Provides that the definition of "maintain" includes the periodic changing of advertising messages as well as the normal maintenance or repair of signs and sign structures. In a provision defining "erect", provides that the following shall not constitute normal maintenance or repair of a sign or sign structure: replacing more than 60% of the uprights, in whole or in part, of a wooden sign structure; replacing more than 30% of the length above ground of each broken, bent, or twisted support of a metal sign structure; raising the height above ground of a sign or sign structure; making a sign bigger; adding lighting; or similar activities that substantially change a sign or make a sign more valuable. Effective immediately.