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:''This page describes energy efficiency in means of transportation. For the environmental impact assessment of a given product or service throughout its lifespan, see life cycle assessment.'' The energy efficiency of different types of transportation ranges from some hundred kilojoules per kilometre for a bicycle to several megajoules for a helicopter. == Units of measurement == Efficiency can be expressed in terms of: * distance per vehicle per unit fuel volume (e.g. km/L or miles per gallon (US or imperial)) * distance per vehicle per unit fuel mass (e.g. km/kg)〔Aeroplane Efficiency, ''Fédération Aéronautique Internationale'', "FAI – The World Air Sports Federation"〕 * volume of fuel (or total energy) consumed per unit distance per vehicle (e.g. L/100 km or kW·h/100 km), * volume of fuel (or total energy) consumed per unit distance per passenger (e.g. L/(100 passenger·km)) * volume of fuel (or total energy) consumed per unit distance per unit mass of cargo transported (e.g. L/100 kg·km or MJ/t·km). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「energy efficiency in transportation」の詳細全文を読む スポンサード リンク
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