Besides the function to assure the smooth traffic, overpasses, as three-dimensional new road nodes, have vital meanings as nodes in the urban landscape system.

城市立交桥作为立体化的新型道路节点，除具备组织交通、顺畅交通的功能之外，更作为景观节点对于城市意象有重要的意义。

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Resistance function of urban road is the key and difficult problem in traffic study. It plays a vitally important role in traffic assignment.

城市道路的路阻函数是交通研究中的关键点和难点，对交通分配起着至关重要的作用。

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Scenic byway is a combination of tourism and transport function of the landscape road, which has the multiple value of traffic, landscape, recreational, historical, cultural and natural.

风景道是旅游与交通功能相结合的景观道路，具有交通价值、景观价值、游憩价值、历史价值、文化价值、自然价值、文物价值等多重功能。

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