Accessibility in Practice: 20-Minute City as a Sustainability Planning Goal

Denise Capasso da Silva · Shea V. Lemar

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Urban Transport and Accessibility Transportation Planning and Optimization Urban Design and Spatial Analysis

Abstract

Cities can enhance their sustainability planning by prioritizing accessibility as a performance metric for transportation planning. In this context, accessibility measures the ease of reaching opportunities and captures more characteristics of sustainable cities than the more conventionally used mobility metrics, focusing on the overall ability to move and generally recommending faster speeds to overcome distance. However, how cities can prioritize accessibility in planning is understudied. This research presents a case of Tempe, Arizona, putting accessibility into practice through a 20-min lens. Using a 20-min threshold for all modes, the city aims to promote travel for daily activities that is less reliant on private autos. The analysis presented here documents the challenges that planners face when planning for accessibility. The challenges range from technical points to decisions that need to be made about the quality of the built environment. The analysis also shows that Tempe, which is a classically suburban city of wide roads and single-family homes that was built around the automobile, is highly accessible by a 20-min metric by bicycling, walking and transit. These results suggest that planners focus on street network improvements that prioritize accessibility as part of a sustainability strategy.

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References

2005Sustainable accessibility: a conceptual framework to integrate transport and land use plan-making. Two test-applications in the Netherlands and a reflection on the way forward 2006The Irvine–Minnesota Inventory to Measure Built Environments 2007The new narrative of accessibility: its potential contribution to discourses in (transport) geography

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2022Barcelona under the 15-Minute City Lens: Mapping the Accessibility and Proximity Potential Based on Pedestrian Travel Times 2021A city of cities: Measuring how 15-minutes urban accessibility shapes human mobility in Barcelona 2021The 20-minute city: An equity analysis of Liverpool City Region 2023Measuring compliance with the 15-minute city concept: State-of-the-art, major components and further requirements 2024The 15-minute city quantified using human mobility data 2022The 15-minute city concept and new working spaces: a planning perspective from Oslo and Lisbon 202215-, 10- or 5-minute city? A focus on accessibility to services in Turin, Italy 2021A Methodological Approach on Disused Public Properties in the 15-Minute City Perspective

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