RCW 46.61.755 Traffic laws apply to persons riding bicycles
Every person riding a bicycle upon a roadway shall be granted all of the rights and shall be subject to all of the duties applicable to the driver of a vehicle by this chapter, except as to special regulations in RCW 46.61.750 through 46.61.780 and except as to those provisions of this chapter which by their nature can have no application.
Looking for more information? Check out these articles:
Lamps and other Equipment
Clinging to Vehicles
Riding on Bicycles
Riding on Roadways and Bicycle Paths
Effect of Regulations
Riding under the Influence
Definition of "Vehicle"
Definition of "Roadway"
Definition of "Highway"
Definition of "Hours of Darkness"
Definition of "Bicycle"