Road greening, the most important part of urban greenbelt system, may reflect the style and features of urban greening and landscape uniqueness.

道路绿化是城市绿地系统的重要组成部分，它可以体现一个城市的绿化风貌与景观特色。

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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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