Oregon:ORS 811.410(1)(a)(c)
- 811.410 Unsafe passing on left; penalty.
- (1) A person commits the offense of unsafe passing on the left if the person violates any of the following requirements concerning the overtaking and passing of vehicles:
- (a) The driver of a vehicle that is overtaking any other vehicle proceeding in the same direction shall pass to the left of the other vehicle at a safe distance and shall not again drive to the right side of the roadway until safely clear of the overtaken vehicle.
- (c) The driver of a vehicle shall not drive to the left side of the center of the roadway in overtaking and passing a vehicle proceeding in the same direction unless the left side is clearly visible and is free of oncoming traffic for a sufficient distance ahead to permit the overtaking and passing to be completed without interfering with the operation of a vehicle approaching from the opposite direction or a vehicle overtaken.
(Source: http://www.leg.state.or.us/ors/811.html)