关键词: 街道活力, 功能多样性, LBS定位数据, POI数据, 南京西路

Abstract: The functional diversity of the built environment is an effective way to improve street vitality. However, how to balance the functions, how different functional composite modes affect the street vitality, and whether there are differences in the mechanisms that affect different types of street spaces are unclear. Taking the street of West Nanjing Road as an example for the case study, which integrates a series of different functions and covers a variety of streets, LBS positioning data collected from mobile internet and POI data are used to measure street vitality and functional diversity. The impact of functional diversity on the street vitality is analyzed, in terms of street activity intensity and stability. Then, an optimization strategy adopted for the important sections of West Nanjing  Road is proposed. It is found that a balance between residential and working functions can significantly decrease the intensity of street activities, and ensuring a balance of residential-commercial functions is conducive to the stability of street activity. In addition, the impact of the design of the external environment on street vitality cannot be ignored. This study can provide theoretical support and practical guidance in the future design of streets.

Key words: street vitality, functional diversity, LBS positioning data, POI data, West Nanjing Road