Ohio Revised Code Title LV. Roads Highways Bridges § 5517.07

(A) If not already present, the department of transportation shall install signs and other traffic control devices designed to slow down the flow of traffic in construction and similar work zones. The signs and devices may include arrow boards, channelizing devices, temporary raise pavement markers, portable changeable message signs, temporary traffic barriers, screens, rumble strips, and any other signs or devices the director of transportation determines are appropriate for the highway and local conditions.

(B) The department shall ensure that the placement and specifications for the signs and devices conform to the department's manual of uniform traffic control devices as adopted under section 4511.09 of the Revised Code.