With the development of city and improvement of road infrastructure, urban elevated road becomes the important way of interurban traffic.
随着城市的飞速发展和道路基础设施的改善，建设城市高架道路已成为国内外城市解决城市交通的重要手段。
The characteristics of different traffic models that exist in the incity and interurban traffic systems respectively are researched and the calculation models of urban traffic demand are put forward.
再通过研究城市市内交通、过境交通及对外交通中各种交通方式的特点，提出城市交通需求的计算模型；
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