Ohio Rev. Code § 5541.01
There shall be created in each county within the state a system of county highways, which system shall be selected and determined in the following manner:
The board of township trustees shall, upon request and under the direction of the board of county commissioners of the county within which such township is located and upon such forms as are prescribed by the board of county commissioners, make a report to the board of county commissioners setting forth the relative value of each road in the township in consecutive order as a used highway, the kind of traffic over such road, its length and present condition, together with such other information as may be desired and requested by the board of county commissioners. The board of county commissioners may request the aid and assistance of the county engineer in preparing blank forms and reports for the use of the board of township trustees together with any maps which in its judgment may be needed by the board of township trustees in making its report.
R.C. §5541.01