Ohio Revised Code Title LV. Roads Highways Bridges § 5591.35

The board of county commissioners may provide for the proper lighting of bridges over streams, highway intersections, highway or railroad grade separations or interchange areas erected by it. The cost of such lighting shall be paid from the bridge fund of the county, or from any funds available for highway construction or maintenance and repair, on the order of the board. This section does not apply where the board has constructed three or more bridges within the limits of a municipal corporation. In such case the municipal corporation shall light the bridges within its limit at its own expense.