337.21 REAR-VIEW MIRROR; CLEAR VIEW TO FRONT, BOTH SIDES AND REAR.
(a) Every motor vehicle and motorcycle shall be equipped with a mirror so located as to reflect to the operator a view of the street to the rear of such vehicle or motorcycle. Operators of vehicles and motorcycles shall have a clear and unobstructed view to the front and to both sides of their vehicles or motorcycles and shall have a clear view to the rear of their vehicles or motorcycles by mirror.
(b) Whoever violates this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.
(ORC 4513.23)