ORS 825.206: Duties of interstate carriers.

A person engaged exclusively in the conduct of interstate transportation shall:

      (1) Observe and comply with the laws of this state regulating traffic on its highways, or the operation of motor vehicles thereon, or limiting the size, weight or speed of motor vehicles; and

      (2) Observe and comply with the laws of this state and with the orders, rules and regulations of the Department of Transportation, county courts, boards of county commissioners and municipal authorities to protect the highways from substantial damage and to promote safety to other users thereof, to adjacent property and facilities and to the public.