In CA, and at least half of the other states, unless prohibited specifically by separate ordinance, a vehicle with pedals that has a motor with less than 750w and a throttle that shuts off at 20 mph is considered a bicycle BY STATE LAW. I'm in favor of this because it allows physically impaired individuals the same freedom as the rest of us. Also, I've heard of individuals who were in an accident being able to ride back using a throttle.