Ohio Rev. Code § 4513.181: Standards and specifications applicable to rural mail delivery vehicles, state highway survey vehicles, and funeral escort vehicles.

The director of public safety subject to the provisions of sections 119.01 to 119.13 of the Revised Code shall adopt standards and specifications applicable to rural mail delivery vehicles, state highway survey vehicles, and funeral escort vehicles. Such standards and specifications shall permit rural mail delivery vehicles, state highway survey vehicles, and funeral escort vehicles the use of flashing lights.