Ohio Revised Code Title LV. Roads Highways Bridges § 5516.05

(A) The director of transportation may designate any portion of any of the following as a scenic byway:

(B) The director shall exclude from designation as a scenic byway any segment of a highway in a zoned or unzoned commercial or industrial area that is determined by the director to be inconsistent with the designation of a scenic byway.

(C) No advertising device may be erected upon a designated scenic byway, except in accordance with division (A) or (B) of section 5516.02 of the Revised Code, division (A), (B), or (C) of section 5516.06 of the Revised Code, or division (A) of section 5516.061 of the Revised Code. Any advertising device lawfully in existence prior to the designation of a scenic byway, upon such designation, is a nonconforming advertising device under section 5516.07 of the Revised Code.