Oregon:ORS 811.415(2)(a)(A)(B)
- 811.415 Unsafe passing on right; penalty.
- (2) For purposes of this section, a person may drive a vehicle to overtake and pass upon the right of another vehicle under any of the following circumstances:
- (a) Overtaking and passing upon the right is permitted if:
- (A) The overtaken vehicle is making or the driver has signaled an intention to make a left turn;
- (B) The paved portion of the highway is of sufficient width to allow two or more lanes of vehicles to proceed lawfully in the same direction as the overtaking vehicle; and
(Source: http://www.leg.state.or.us/ors/811.html)