(1) Once every two years, the Oregon Department of Administrative Services shall conduct a highway cost allocation study. The purpose of the study is to determine: (a) The proportionate share that the users of each class of vehicle should pay for the costs of maintenance, operation and improvement of the highways, roads and streets in the state; and (b) Whether the users of each class are paying that share. (2) Each study must include: (a) An examination of the most recent study period for which actual data are available for the purpose of determining the accuracy of the most recently published study results; and (b) An examination of the prospective study period based on projected data for the purpose described in subsection (1) of this section. (3) The department may use any study design the department determines will best accomplish the purposes stated in subsection (1) of this section. In designing the study, the department may make decisions that include, but are not limited to, the methodology to be used for the study, what constitutes a class of vehicle for purposes of collection of data under subsections (1) to (5) of this section and the nature and scope of costs that will be included in the study. (4) The department may appoint a study review team to participate in the study required by subsection (1) of this section. The team may perform any functions assigned by the department, including, but not limited to, consulting on the design of the study. (5) A report on the results of the study shall be submitted to the legislative revenue committees and the Joint Committee on Transportation by January 31 of each odd-numbered year. (6) The Legislative Assembly shall use the report described in subsection (5) of this section to determine whether adjustments to revenue sources described in Article IX, section 3a (3), of the Oregon Constitution, are needed in order to carry out the purposes of Article IX, section 3a (3), of the Oregon Constitution. If such adjustments are needed, the Legislative Assembly shall enact whatever measures are necessary to make the adjustments. Note: 366.506 is amended by Enrolled House Bill 3991 (2025 special session). As of the date of publication of the 2025 Edition of the Oregon Revised Statutes, Enrolled House Bill 3991 (2025 special session) is subject to potential referendum petitions that may be filed with the Secretary of State as provided in Article IV, section 1, of the Oregon Constitution. The full text of Enrolled House Bill 3991 (2025 special session) is set forth following 801.610. Note: 366.506 was enacted into law by the Legislative Assembly but was not added to or made a part of ORS chapter 366 or any series therein by legislative action. See Preface to Oregon Revised Statutes for further explanation.
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