ORS 368.016: County authority over roads; limitations.

(1) Except as provided in this section or as otherwise specifically provided by law, the exercise of governmental powers relating to a road within a county is a matter of county concern.

      (2) A county governing body:

      (a) Does not have jurisdiction over any public road that is a state highway.

      (b) Shall only take action involving a local access road within a city if the city governing body consents to the action.

      (c) May by resolution or order make any public road within its jurisdiction a county road.

      (3) Any road that has a classification as a county road on November 1, 1981, shall retain that classification unless the classification is changed under ORS 368.026 or as otherwise provided by law.

      (4) A county governing body may seek assistance from the Department of Transportation as provided under ORS 366.155.