Urban viaduct as an organic part of urban transportation,have given rise to a series of under-bridge spaces that have not been fully utilized by the city due to their three-dimensional road patterns,leading to the waste of urban resources.In addressing the issues encountered in the renovation and renewal of under-bridge spaces in Hangzhou,the concept of urban micro-renewal is introduced to explore the application of a micro-renewal model that is small-scale,incremental,and involves multi-party participation in the optimization of under-bridge spaces.It is suggested that the micro-renovation of under-bridge spaces should focus on three key aspects:integrating traffic flow both inside and outside the space,clarifying the spatial identity,and enhancing the space's distinctiveness.Taking the under-bridge space on the west bank of the Hangzhou Zhijiang Bridge as a case study,a systematic exposition of the renovation strategies and updating methods is presented.
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