Ohio Rev. Code § 5533.03: Grand Army of the Republic Highway.

The road known as United States route number six, extending across the northern portion of the state through the counties of Williams, Henry, Wood, Sandusky, Erie, Lorain, Cuyahoga, Lake, Geauga, and Ashtabula and through the municipal corporations of Byran, Napoleon, Bowling Green, Fremont, Sandusky, Lorain, Cleveland, and Chardon shall be known as "the Grand Army of the Republic highway."

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