Ohio Revised Code Title LV. Roads Highways Bridges § 5529.12

The director of transportation, board of county commissioners, board of township trustees, or other proper officials, may, as a part of the plans or specifications for a proposed improvement, provide for the planting of trees or shrubbery along or upon the public highway embraced within the proposed improvement. Such officials may provide for the planting of trees or shrubbery along any public highway.