Evaluation of micro-parcel service facility accessibility and analysis of the impact of road network optimization

TANG Wen; SHE Yueyu; ZHENG Xiaoyi; CHEN Lingjuan; WANG Zhu; XU Lin

doi:10.11860/j.issn.1673-0291.20230139

Abstract：Existing service facility accessibility evaluation methods face issues of large-scale analysis,low data precision,and the inability to rely on network map Application Programming Interface (API) for evaluating road network planning solutions. To address these problems,this study proposes a micro-parcel comprehensive service facility accessibility evaluation method suitable for planning scheme assessment. The study area is divided into 565 micro-parcels based on land use characteristics. Population distribution in each parcel is calculated using the spatial distribution of actual residential buildings. A subway-bus weighted composite network model and a vehicle road network model are constructed based on real road network data,and the travel time calculation method is designed. Using an improved potential model,the accessibility of five types of facilities,including medical,educa-tional,employment,commercial services,and cultural leisure facilities,for each parcel is precisely calculated,and their weights are combined to obtain the overall accessibility. Furthermore,the update of the transportation network based on the road network planning scheme is considered to evaluate its specific impact on accessibility. Results indicate a strong correlation between accessibility and the spa-tial distribution of service facilities and transportation networks. A rational layout of the public transit network can effectively mitigate disparities in accessibility distribution caused by differences in service facilities and road networks. Optimizing the road network significantly enhances accessibility levels,though the extent of improvement varies across different areas. Regions with higher facility density experience greater increases in accessibility. This evaluation method offers a new perspective and tools for the rational allocation of various public service facilities,planning and optimization of transporta-tion networks,and enhancement of social equity within urban areas.