Ohio Revised Code Title XLV. Motor Vehicles Aeronautics Watercraft § 4511.27

(1) The operator of a vehicle or trackless trolley overtaking another vehicle or trackless trolley proceeding in the same direction shall, except as provided in division (A)(3) of this section, signal to the vehicle or trackless trolley to be overtaken, shall pass to the left thereof at a safe distance, and shall not again drive to the right side of the roadway until safely clear of the overtaken vehicle or trackless trolley. When a motor vehicle or trackless trolley overtakes and passes a bicycle or electric bicycle, three feet or greater is considered a safe passing distance.

(2) Except when overtaking and passing on the right is permitted, the operator of an overtaken vehicle shall give way to the right in favor of the overtaking vehicle at the latter's audible signal, and the operator shall not increase the speed of the operator's vehicle until completely passed by the overtaking vehicle.

(3) The operator of a vehicle or trackless trolley overtaking and passing another vehicle or trackless trolley proceeding in the same direction on a divided highway as defined in section 4511.35 of the Revised Code, a limited access highway as defined in section 5511.02 of the Revised Code, or a highway with four or more traffic lanes, is not required to signal audibly to the vehicle or trackless trolley being overtaken and passed.