There is a need in many countries to redirect public spending away from promoting private vehicle use to mass transit systems, as well as to encourage the use of cleaner fuels, transfer of cleaner technologies and the better maintenance of vehicles.
许多国家需要将公共开支从鼓励使用私人车辆转用到公共交通系统上面，以及鼓励使用洁净燃料、转让洁净技术和改善车辆维修。