“Traffic” means pedestrians, ridden or herded animals, vehicles, streetcars, and other devices, either singly or together, while using for purposes of travel any highway or private road open to public travel.
(ORC 4511.01(TT))
301.46
TRA “Traffic control device” means a flagger, sign, signal, marking, or other device used to regulate, warn, or guide traffic, placed on, over, or adjacent to a street, highway, private road open to public travel, pedestrian facility, or shared-use path by authority of a public agency or official having jurisdiction, or, in the case of a private road open to public travel, by authority of the private owner or private official having jurisdiction.
(ORC 4511.01(QQ)) "Traffic control devices" means all flaggers, signs, signals, markings and devices placed or erected by authority of a public body or official having jurisdiction, for the purpose of regulating, warning or guiding traffic, including signs denoting names of streets and highways.
(ORC 4511.01(QQ))