Abstract
To evaluate the sustainability of an enormous number of urban intersections, a novel assessment model is proposed, along with an indicator system and corresponding methods to determine the indicators. Considering mainly the demands and feelings of the urban residents, the three aspects of safety, functionality, and image perception are taken into account in the indicator system. Based on technologies such as street view picture crawling, image segmentation, and edge detection, GIS spatial data analysis, a rapid automated assessment method, and a corresponding multi-source database are built up to determine the indicators. The improved information entropy method is applied to obtain the entropy weights of each indicator. A case study shows the efficiency and applicability of the proposed assessment model, indicator system and algorithm.
Highlights
As one of the countries with the fastest urbanization and motorization processes, China has been haunted by sustainable development issues in big cities, such as traffic jams and the absence of human-scale planning
From the perspective of the demand and subjective perception of users, an assessment indicator system of the sustainability of urban plane intersection is established in this paper, covering three aspects: safety, functionality, and image perception
The techniques of image recognition, GIS spatial data analysis, web crawling, etc. are used to obtain the value of the assessment indicators, and the multi-level information entropy method is used to determine the weight of the assessment indicator
Summary
As one of the countries with the fastest urbanization and motorization processes, China has been haunted by sustainable development issues in big cities, such as traffic jams and the absence of human-scale planning. The concept of safety is the ontological foundation of sustainability [20] From this point of view, the number of conflict points, angle of intersection, and the existence of exclusive lanes, boundary fence, and colored bicycle lanes are taken as indicators. In terms of the functionality, the congestion degree, node degree, average spacing, average road width, accessibility of metro, accessibility of buses, and diversity of service are taken as indicators. If there is a barrier section between sidewalk, non-motorized vehicle lane, and motorized vehicle lane or not
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