因此，美国正积极在分散的郊区规划中配置大量节能的公共交通运输系统。

As a result, American cities are now struggling to install energy-saving mass transportation in their dispersed, suburban layouts.

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提出了基于GIS等时线分析方法的理论模型，以城市公共交通运输系统的主要工具——公共汽车和城市火车为例，描述了等时线分析的设计原型。

Through the analysis of the urban public transportation system, a new theoretical model based on GIS isochrone approach is put forward and a design prototype is described with an isochrone analysis.

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基于智能交通运输系统的背景，研究提供公共交通信息的条件下公交换乘时间最短的调度问题，提出线性规划模型，并用界例进行了演示。

Based on Intelligent Transport Systems, the paper provides deadheading in minimum time of public transfer under the condition of traffic information. The paper developed a Linear Programming model.

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