301.50 URBAN DISTRICT.

   "Urban district" means the territory contiguous to and including any street or highway which is built up with structures devoted to business, industry or dwelling houses situated at intervals of less than 100 feet for distance of a quarter of a mile or more, and the character of such territory is indicated by official traffic control devices.
(ORC 4511.01(PP))

301.51 VEHICLE.

   "Vehicle" means every device, including a motorized bicycle, in, upon or by which any person or property may be transported or drawn upon a street or highway, except that “vehicle” does not include any motorized wheelchair, electric personal assistive mobility device, or any device, other than a bicycle, that is moved by human power. 
(ORC 4511.01(A))

301.52 WHEELCHAIR, MOTORIZED.

   "Motorized wheelchair" means any self-propelled vehicle designed for, and used by, a handicapped person and that is incapable of a speed in excess of eight miles per hour.

(ORC 4511.01(EEE))

301.53 U-TURN.

   “U-Turn”  means a turn that reverses the direction in which the vehicle making the turn is proceeding. 
(1980 Code 70.01)