Ohio Rev. Code § 4965.57: Companies must transport cars of other companies.

When the tracks of two railroad companies are connected as provided in section 4965.56 of the Revised Code, either company, when required, shall transport any freight offered over its railroad to its destination on such railroad in cars in which it is offered at its local rates per mile as set forth in its freight tariff for the distance most nearly corresponding, and return the cars, with or without freight or unnecessary delay.