Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4511.11

(A) Local authorities in their respective jurisdictions shall place and maintain traffic control devices in accordance with the department of transportation manual for a uniform system of traffic control devices, adopted under section 4511.09 of the Revised Code, upon highways under their jurisdiction as are necessary to indicate and to carry out sections 4511.01 to 4511.76 and 4511.99 of the Revised Code, local traffic ordinances, or to regulate, warn, or guide traffic.

(B) The director of transportation may require to be removed any traffic control device that does not conform to the manual for a uniform system of traffic control devices on the extensions of the state highway system within municipal corporations.

(C) No village shall place or maintain any traffic control signal upon an extension of the state highway system within the village without first obtaining the permission of the director. The director may revoke the permission and may require to be removed any traffic control signal that has been erected without the director's permission on an extension of a state highway within a village, or that, if erected under a permit granted by the director, does not conform to the state manual, or that is not operated in accordance with the terms of the permit.

(D) All traffic control devices erected on any street, highway, alley, bikeway, or private road open to public travel shall conform to the state manual.

(E) No person, firm, or corporation shall sell or offer for sale to local authorities any traffic control device that does not conform to the state manual, except by permission of the director.

(F) No local authority shall purchase or manufacture any traffic control device that does not conform to the state manual, except by permission of the director.

(G) Whoever violates division (E) of this section is guilty of a misdemeanor of the third degree.