The plan is to shift to efficient, low carbon bus rapid transit systems and light rail, and to retire old buses and replace them with lower carbon alternatives, such as hybrid vehicles.

城市交通规划的目标是向节能、低碳型快速公交系统转变，淘汰老旧公交车，用混合动力车等低碳车辆对其进行更换。

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Rogoff has had an instrumental role in advising policy makers on the operating and capital needs of Amtrak, including the initiation and financing of high speed Acela service, as well as the financing of dozens of new light rail and bus rapid transit systems across the United States.

WHITEHOUSE: THE WHITE HOUSE

The government plans to tackle congestion in cities by a big expansion in light rail, trams and other rapid-transit systems.

ECONOMIST: British election briefing: Transport