The highway constituting a portion of the Appalachian highway system and running east and west across the state between Cincinnati, Ohio and Belpre, Ohio, and passing near the city of Jackson, Ohio, shall be known as the "James A. Rhodes Appalachian Highway."
Whenever a section of said highway is opened to the use of traffic, the director of transportation shall, as soon as practicable, erect thereon suitable markers indicating its name.