402.381  STATE HIGHWAY.
   "State highway" means a highway under the jurisdiction of the Department of Transportation, outside the limits of municipalities, provided that the authority conferred upon the Director of Transportation in Ohio R.C. 5511.01 to erect State highway route markers and signs directing traffic shall not be modified by Ohio R.C. 4511.01 through 4511.79 and 4511.99.
(ORC 4511.01(II))