The road known as state route number forty-one, running in a northeasterly and southwesterly direction, commencing at the village of Aberdeen, in Brown county, as the junction of United States route number fifty-two, and extending through the counties of Adams, Highland, and Pike to the junction of state route number forty-one with state route number fifty, at the west junction thereof, in Ross county, shall be known as the “Old Zane Trace Memorial Highway.”

The director of transportation shall erect suitable markers upon said highway indicating its name.