然后从个人选择导向和政策导向两个角度，分别研究了交通结构优化的约束条件。

Then, the constraints of transport structure optimization are discussed from two aspects: personal selection and policy influence. Based on the analysis, the mathematical pr…

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“十五”以来，北京市开始重视交通结构优化研究，以求通过出行方式转移来缓解城市交通拥堵状况。

Beijing has started the research to optimize city traffic structure since the tenth five year plan, in order to solve traffic congestion by changing people's traffic modes.

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着力解决交通运输“卡脖子”路段，进一步优化能源结构。

We will work hard to resolve transportation bottlenecks and continue to upgrade energy structure.

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