Abstract
Life street can be considered as the typical street type which is most closely related to the daily life, due to it comprises the major life behavior and necessary public service. Synchronously, urban form as the external environment, it also significantly impacts on the street space and vitality. However, the previous researches generally focus on the vitality of living streets through the perspectives of aesthetics and functionalism. Thus, a remarkable limitation should be pointed out here is that these previous studies might ignore the inherent mathematical correlation between the street space vitality and elements of urban form. Based on the above, how to rationally analyze the impact mechanism between urban form factors and street vitality on the human scale? What are the key factors affecting vitality, and how to optimize the street space towards a better livable environment? For answer the above questions, the GIS platform and SPSS statistical analysis software was adopted here to conduct the data analysis. In addition, the multi-source urban big data including the spatial and temporal location data of the population and the three-dimensional urban data was collected to quantitatively analyze the internal relationship between street vitality and urban form. The results indicated that the near-line rate and street width have a greater impact on the street vitality, while the influence of height-to-width ratio, and sidewalk width factors is weaker. Meanwhile, there is a threshold in the change of street population vitality in street width and near-line rate. That is, within the threshold range, the vitality is positively correlated with the above key impact factors. Beyond the threshold, this impact is not obvious. According to the key findings in here, the optimization strategies of urban form towards better livable and high-vitality street can be promoted in further planning or policymaking process.
