ORS 810.438: Photo radar.

(1) A city at its own cost may operate photo radar.

      (2) A photo radar system operated under this section:

      (a) May be used on streets in residential areas or school zones.

      (b) May be used in other areas if the governing body of the city makes a finding that speeding has had a negative impact on traffic safety in those areas.

      (c) May not be used on controlled access highways.

      (d) May not be used unless a sign is posted announcing “Traffic Laws Photo Enforced.” The sign posted under this paragraph must:

      (A) Be on the street on which the photo radar unit is being used;

      (B) Be between 100 and 400 yards before the location of the photo radar unit;

      (C) Be at least two feet above ground level; and

      (D) If posted in a school zone not otherwise marked by a flashing light used as a traffic control device, indicate that school is in session.

      (3) A city that operates a photo radar system under this section shall, once each biennium, conduct a process and outcome evaluation for the purposes of subsection (4) of this section that includes:

      (a) The effect of the use of the photo radar system on traffic safety;

      (b) The degree of public acceptance of the use of the photo radar system; and

      (c) The process of administration of the use of the photo radar system.

      (4) By March 1 of each odd-numbered year, each city that operates a photo radar system under this section shall present to the Legislative Assembly the process and outcome evaluation conducted by the city under subsection (3) of this section.