Washington Revised Code Title 46. Motor Vehicles § 46.61.608. Operating motorcycles on roadways laned for traffic

(1) All motorcycles are entitled to full use of a lane and no motor vehicle shall be driven in such a manner as to deprive any motorcycle of the full use of a lane. This subsection shall not apply to motorcycles operated two abreast in a single lane.

(2) The operator of a motorcycle shall not overtake and pass in the same lane occupied by the vehicle being overtaken. However, this subsection shall not apply when the operator of a motorcycle overtakes and passes a pedestrian or bicyclist while maintaining a safe passing distance of at least three feet.

(3) No person shall operate a motorcycle between lanes of traffic or between adjacent lines or rows of vehicles.

(4) Motorcycles shall not be operated more than two abreast in a single lane.

(5) Subsections (2) and (3) of this section shall not apply to police officers in the performance of their official duties.