| With the development of cities,the proportion of transportation carbon emissions in urban carbon emissions is increasing,which is not conducive to the construction of lowcarbon cities in China.In recent years,the correlation between built environment and residents’ low-carbon travel choice has become one of the hot spots in the field of urban planning.With the proposal of the concept of 15 minute life circle in recent years,it has become a consensus to regard 15 minute life circle as the most basic living unit of residents.In addition,it is also the starting point for residents to go to other functional areas.Therefore,it is of practical significance to study the built environment of 15 minute life circle,so as to build a 15 minute life circle suitable for residents’ low-carbon travel.This paper takes the low-carbon travel choice of residents in the built-up environment of 15 minute living circle as the main research object.Firstly,based on the current situation of the study area and combined with literature review,the measurement indicators are divided into two dimensions: socio-economic attribute and built-up environment.At the level of socio-economic attribute,due to the availability of data,three indicators are selected: gender,age and house price,The built environment is divided into three aspects: land use,road system and public transport facilities,including nine measurement indexes: floor area ratio,building density,land use mixing degree,road network density,intersection density,entrance and exit density,bus stop density,bus line network density and rail transit station density.Then,divides the study area into 10 15 minute life circle,as an independent basic unit of residents,collects and analyzes the data of residents’ travel behavior characteristics and built environment characteristics in the 10 15 minute life circle,so as to form a comprehensive model A relatively perfect survey data system based on Residents’ travel and built environment is established,and the residents’ travel data and built environment data in each 15 minute living circle are processed by removing outliers,obtaining travel trajectory,data vectorization and mathematical statistics.The residents’ travel data and built environment data in each 15 minute living circle in the study area are statistically compared for reference The characteristics of residents’ travel behavior,built environment and their correlation are analyzedThen,through the correlation analysis,we get the correlation between various socioeconomic attributes and built environment attributes and the proportion of low-carbon travel mode,and preliminarily screen out the socio-economic attributes and built environment factors that have a significant impact on Residents’ choice of low-carbon travel mode,and further use multiple regression analysis to get the final impact of built environment factors on Residents’ choice of low-carbon travel mode Finally,through the establishment of a single regression model,the appropriate values of the key indicators of built environment are simulated.Finally,combined with the analysis conclusion,the paper puts forward the optimization strategy of the built environment of 15 minute living circle suitable for residents’ low-carbon travel from the three dimensions of land use,road system and public transport facilities.In the aspect of land use,it is optimized from three aspects: the scale of 15 minute life circle suitable for residents’ low-carbon travel,perfect public service ratio and balanced and centralized land use layout;in the aspect of road system,it is optimized from two aspects: road network connectivity and suitable slow travel environment;in the aspect of public transport facilities,it is optimized from two aspects:public transport station layout and public transport connection system. |
