Accessibility instruments in planning practice: Bridging the implementation gap

Silva, Cecília; Bertolini, Luca; Brömmelstroet, Marco te; Milakis, Dimitris; Papa, Enrica

doi:10.1016/j.tranpol.2016.09.006

Cited by 94 publications

(53 citation statements)

References 18 publications

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“…Accessibility measures offer a clearer sense as to what people value in cities, which is the ease of reaching the places they want to go. Applying the concept of accessibility in practice presents a new set of challenges [13], however. Accessibility is a metric, but what are acceptable parameters of what is considered accessible must be set through policy.…”

Section: Introductionmentioning

confidence: 99%

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

Silva¹,

King

Lemar

2019

Sustainability

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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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Section: Introductionmentioning

confidence: 99%

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

Silva¹,

King

Lemar

2019

Sustainability

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“…This calls for bridging the communication gap between the planning and remote sensing communities, similar to the gap stressed by Silva, Bertolini, te Brömmelstroet, Milakis, and Papa (2017) showing that planners have different expectations about planning support tools while developers/researchers are not well aware about their requirements. Thus too little research focuses on what are the information requirements by planning practitioners, for instance, at what spatial-temporal scale and level of semantic detail information would be needed.…”

Section: Recommendations For Further Researchmentioning

confidence: 90%

Spatial patterns of deprivation in cities of the global south in very high resolution imagery

Kuffer

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“…However, it may not be the only cause. Previous research [50] indicated that the performance of experts in digitizing in an image is affected by internal and external factors. Internal factors include demographics, experience and skills, personality, memory span, motivation and comparative anxiety.…”

Section: Discussionmentioning

confidence: 99%

“…However, when aiming at remote sensing based slum mapping, it will be very important to make these uncertainties explicit and clarify how they relate to mapping accuracies. Making these uncertainties explicit is important for bridging the communication gap [50] between technical experts and planners. This will allow for better understanding the scope and limitations of OBIA based slum mapping in support of planning and decision making on monitoring the implementation of slum upgrading policies.…”

Section: Discussionmentioning

confidence: 99%

Coupling Uncertainties with Accuracy Assessment in Object-Based Slum Detections, Case Study: Jakarta, Indonesia

et al. 2017

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Object-Based Image Analysis (OBIA) has been successfully used to map slums. In general, the occurrence of uncertainties in producing geographic data is inevitable. However, most studies concentrated solely on assessing the classification accuracy and neglecting the inherent uncertainties. Our research analyses the impact of uncertainties in measuring the accuracy of OBIA-based slum detection. We selected Jakarta as our case study area because of a national policy of slum eradication, which is causing rapid changes in slum areas. Our research comprises of four parts: slum conceptualization, ruleset development, implementation, and accuracy and uncertainty measurements. Existential and extensional uncertainty arise when producing reference data. The comparison of a manual expert delineations of slums with OBIA slum classification results into four combinations: True Positive, False Positive, True Negative and False Negative. However, the higher the True Positive (which lead to a better accuracy), the lower the certainty of the results. This demonstrates the impact of extensional uncertainties. Our study also demonstrates the role of non-observable indicators (i.e., land tenure), to assist slum detection, particularly in areas where uncertainties exist. In conclusion, uncertainties are increasing when aiming to achieve a higher classification accuracy by matching manual delineation and OBIA classification.

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Accessibility instruments in planning practice: Bridging the implementation gap

Cited by 94 publications

References 18 publications

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

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

Spatial patterns of deprivation in cities of the global south in very high resolution imagery

Coupling Uncertainties with Accuracy Assessment in Object-Based Slum Detections, Case Study: Jakarta, Indonesia

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