Time isochrones are a more effective first step in planning densifiable areas with a focus on pedestrian mobility

Abstract

Pedestrian reach is one of the main elements to consider when defining the scope of densification areas from a centrality standpoint. The aim of the article is to analyze the definition of the scope of urban densification areas in the context of Transit-Oriented Development (TOD), through the application of a simple radius from mass transit stations, compared to the definition via isochrones of walking time. The municipality of São Paulo was analyzed, whose Strategic Master Plan (PDE) of 2014 adopted a 600m radius as a parameter for areas to be densified, which was extended to 700m with the PDE revision in 2023. The results indicate that, on a macro scale, the urban densification area defined by the simple radius of the PDE-2023 is quite similar to the area delimited by the 10-minute walking isochrones, in total quantitative terms. However, on a micro scale, several locations were identified where there is an expansion or a reduction of areas for densification in relation to this isochrone. It is concluded that the simple radius does not adequately represent pedestrian reach, omitting urban elements that impact the access to stations. Time isochrones are a more effective instrument, as they incorporate certain urban morphological effects and allow for greater detail of the territory reached in a certain walking pattern.

Keywords
DOT; Pedestrian catchment area; Urban density; Urban policies