The Role of Accessibility to Public Transport and Quality of Walking Environment on Urban Equity: The Case of Santiago de Chile

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Abstract
Most studies of public transport accessibility have focused on proximity to stops, walking distances or time to reach them. This approach ignores other accessibility barriers, such as the quality of the urban environment of these walks. The aim of this research is to analyze both accessibility to public transport stops and the quality of the urban walking environment, exploring fairness issues across the city in terms of these two dimensions. The proposed methodology considers the definition of two indicators: walking accessibility to public transport stops and quality of the walking environment, considering different attributes and dimensions. These indicators are later used to develop a fairness analysis at the local and metropolitan level, using Lorenz curves, Gini coefficient, and Foster-Greer-Thorbecke (FGT) poverty measures. A diagnosis based on these indicators for Santiago de Chile allows us to suggest public policy priorities to improve accessibility to public transport and promote modal shift. The results show that 12 out of 34 municipalities in Santiago are deprived of one or both dimensions, not managing to achieve minimum fairness standards. Moreover, since a correlation between low income and poor access and urban space quality is detected, urban fairness across the city would benefit from centralized urban policies not depending on the budget of each administrative division.

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