Ohio Rev. Code Ann. § 737.022
(A) As used in this section:
(B) In order to expedite the flow and direction of traffic, to eliminate congestion on public ways, and to provide for the safety of passengers in motor vehicles and pedestrians, the legislative authority of a municipal corporation may by ordinance make and issue, or, in the case of the legislative authority of a city, authorize the director of public safety to make and issue rules and regulations concerning: