Ohio Rev. Code § 4511.06: Applicability and uniformity of traffic laws.

Sections 4511.01 to 4511.78, 4511.99, and 4513.01 to 4513.37 of the Revised Code shall be applicable and uniform throughout this state and in all political subdivisions and municipal corporations of this state. No local authority shall enact or enforce any rule in conflict with such sections, except that this section does not prevent local authorities from exercising the rights granted them by Chapter 4521. of the Revised Code and does not limit the effect or application of the provisions of that chapter.