2015 ORS § 373.050¹
Closing streets that intersect with state highways routed through city
(1) Whenever the Department of Transportation has located a highway in, into or through the corporate limits of a city upon or over an alignment or route not theretofore comprising a city street and has acquired the necessary rights of way therefor and constructed a highway thereover, or whenever the department, pursuant to ORS 373.010 (Routing and marking state highways through cities) has selected and designated streets over which to route a state highway within an incorporated city, the department may close any street at the point where it intersects or is intersected by the state highway or by the streets selected and designated as the route of a state highway, by a formal agreement with the municipal authorities of a city set out in a resolution or ordinance of the city, designating the particular streets to be closed by name and intersection.
(2) Before any municipal authorities enter into any such formal agreement with the department, such municipal authorities shall comply with all city ordinances or charter provisions pertaining to the closing of streets in the city.
(3) Before the street can be closed or dead-ended, the department shall, after investigation, find and declare by resolution that the closing of the street at the point of intersection is necessary in order to provide safety for the general public or will contribute to a more expeditious and orderly movement of traffic, or both.