Powered road vehicles with two or three wheels built to carry one or a few occupants, including motorcycles proper and powered three-wheelers such as auto rickshaws that serve the same close-quarters passenger role in many countries. Belongs here: any motorcycle, moped, scooter or powered three-wheeled passenger or light-cargo vehicle. Does not belong here: unpowered bicycles and other human-powered two-wheelers, grouped under bicycles and human-powered road vehicles, or four-wheeled automobiles.