Transportation data availability and model methodology research will constrain the progress of these improvements, however.

交通数据来源和模型方法研究是制约模型改进进程的主要因素。

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The achievement got before only reflected economical linkage by transportation data, it couldn't offer theory and data support to the rational disposition of transport system.

以往的研究成果，只能通过运输联系数据反映经济联系，无法为运输系统的合理配置提供理论支撑和数据。

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“There is a whole transportation infrastructure that is developed on the climate of the past, ” said Tom Karl, head of NOAA’s National Climactic Data Center.

国家海洋和大气管理局国家气象数据中心主管汤姆 卡尔说，“有一个根据过去气候情况所建的完整运输基础设施。”

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Most of the data comes from the industrialized world. Not surprisingly, burning fossil fuels for transportation and electrical generation top the list for their contributions to climate change, acid rain and toxic pollution.

VOA: standard.2010.06.04

The rate at which airlines lost luggage dropped a sharp 26%, according to Department of Transportation data.

WSJ: An Airline Report Card: Fewer Delays, Hassles Last Year, but Bumpy Times May Be Ahead

U.S. Department of Transportation data shows five people died in three separate stretch limo accidents in 2010, and 21 people died in another three stretch limo accidents in 2011.

NPR: Limo Driver: Fire Took 3 Minutes To Claim 5 Lives

With proposals for innovations to solve transportation, education and data needs, one has to ask what have mayors been doing, anyways?

FORBES: What Mayor Bloomberg's Challenge Might Be Telling Us About U.S. Cities