Oregon:ORS 811.375(1)(a)
- 811.375 Unlawful or unsignaled change of lane; penalty.
- (1) A person commits the offense of unlawful or unsignaled change of lanes if the person is operating a vehicle upon a highway and the person changes lanes by moving to the right or left upon the highway when:
- (a) The movement cannot be made with reasonable safety;
(Source: http://www.leg.state.or.us/ors/811.html)