ORS § 366.292
Before proceeding with a modernization project, or a series of modernization projects on a single highway, that might result in a segment of highway to which tolling could reasonably be applied, the Department of Transportation shall determine what portion of the costs of construction and maintenance could be recovered through tolls on users of the project. The toll potential of a modernization project shall be considered among other factors in determining which modernization projects should be included in the Statewide Transportation Improvement Program, with those projects with the greater potential to be self-funded through tolls ranking higher. A determination under this section may be based on assumptions that a single toll would be imposed or on assumptions that tolls would be imposed that vary depending on time of day or any other condition the department deems relevant.
ORS 366.292