Do all powered three-wheeled vehicles need to be licensed as motorcycles?
No. If the vehicle qualifies as a motorcycle as defined in RCW 46.04.330 or 46.04.332, it will be licensed as a motorcycle for street use. However, if the vehicle has a bench seat and a steering wheel as defined in RCW 46.04.330 or 46.04.332, it will be licensed as a passenger vehicle or truck. (5) What license plates and use class will be assigned to my for hire vehicle? The license plates and use class assigned to your for hire vehicle depends upon how you use your vehicle. All for hire vehicles transport passengers and commodities for compensation. For hire vehicles include cabulances, limousines, taxi cabs, and buses hauling passengers for compensation in addition to transporting school children. There are two use classes and license plate combinations assigned to for hire vehicles: (a) CAB use class vehicles are assigned passenger license plates. These vehicles are used exclusively for transporting passengers and their possessions; and (b) F/H use class vehicles are assigned truck
