Ohio Rev. Code Ann. § 723.48

The legislative authority of a municipal corporation may, when a railroad track is laid in the municipal corporation, by ordinance, regulate the speed of all locomotives and railroad cars within the municipal corporation limits. Such ordinance shall not require a rate of speed of less than four miles an hour, and in villages having a population of two thousand or less, it shall not require a rate of less than eight miles an hour. The municipal corporation authorities, by civil action, may recover from an engineer, conductor, or company violating such ordinance, not less than five nor more than fifty dollars for each offense.