Reliable studies have also shown that twowheeled vehicles consume between 55 and 85% less fuel than a four-wheeled vehicle requires for the same journey, although 85% of car journeys are made by unaccompanied drivers.
Pålidelige undersøgelser har også vist, at de tohjulede køretøjer bruger mellem 55 og 857c mindre brændstof end en bil for samme strækning, selv når 857c af turene i bil kun foretages med en person i bilen.