Ohio Rev. Code § 5561.01
Any county may raise or lower the grade of any state or intercounty highway above or below the tracks of railroads and parallel and adjacent interurban railways within the county, and require any railroad company operating a railroad in such county, and any interurban railway company operating an interurban railway parallel and adjacent to the railroad, to raise or lower the grade of its tracks, above or below any state or intercounty highway, and may construct ways or crossings for such highway above the tracks of any railroad and parallel and adjacent interurban railway, or require the railroad company and any interurban railway company operating an interurban railway, parallel and adjacent to such railroad, to construct ways or crossings therefor that are to be passed under its tracks. Such companies may be required to erect permanent piers, abutments, or any other appropriate supports for any of such works on state and intercounty highways within the county, whenever, in the opinion of the board of county commissioners, the raising or lowering of the grade of any such tracks, or the raising, lowering, or construction of such highways or supports is necessary; upon the terms of sections 4957.06 and 5561.01 to 5561.15, inclusive, of the Revised Code.
R.C. § 5561.01