(a) The route along Highway 67 through Jackson County, Lawrence County, Randolph County, and White County regularly traveled by the great legends of early rock 'n' roll is hereby designated "Rock 'n' Roll Highway 67".
(b) The Arkansas Department of Transportation shall erect appropriate signs along Highway 67 through Jackson County, Lawrence County, Randolph County, and White County designating the route as "Rock 'n' Roll Highway 67".