scholarly journals Assessment of disparities in spatial accessibility to vaccination sites in Florida

Annals of GIS ◽  
2022 ◽  
pp. 1-15
Author(s):  
Kyusik Kim ◽  
Mahyar Ghorbanzadeh ◽  
Mark W. Horner ◽  
Eren Erman Ozguven
Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2971
Author(s):  
Mikołaj Bartłomiejczyk ◽  
Marcin Połom

Trolleybus transport refers to contemporary challenges related to a reduction in emissions of greenhouse gases and CO2 into the atmosphere formulated by international institutions, such as the United Nations, the Organisation for Security and Co-operation in Europe, or the European Union. Departure from fossil fuels in urban transport is one of the key challenges for the coming years. Trolleybuses are an important tool in this task, even though their importance was declining in the past. Nowadays, due to, among others, technological development, in particular the availability of high-capacity batteries, their long life and low weight, trolleybus transport is becoming popular again. The use of the existing overhead contact infrastructure of the trolleybus network and small on-board batteries allow expanding the spatial accessibility of zero-emission public transport. Thus, this reduces the social differentiation in access to environmentally friendly transport that does not emit pollutants at the place of operation. The article presents possibilities of using on-board batteries in shaping trolleybus connections with the optimal use of the existing overhead contact lines (OHL). It presents a procedure that allows for the evaluation of the extent to which the OHL should cover the routes of bus lines in order to qualify for trolleybus service in the In-Motion-Charging (IMC) technology. Analysis of the literature shows inadequate scientific studies on combining the advantages of overhead wiring and the development of on-board battery technology in popularising zero-emission transport. This article addresses the key issues related to the use of partially autonomous trolleybuses.


2021 ◽  
Vol 13 (2) ◽  
pp. 442
Author(s):  
Yasna Cortés

The study of the relationship between the provision of local public services and residential segregation is critical when it might be the social manifestation of spatial income inequality. This paper analyzes how the spatial accessibility to local public services is distributed equitably among different social and economic groups in the Metropolitan Area of Santiago (MR), Chile. To accomplish this objective, I use accessibility measures to local public services such as transportation, public education, healthcare, kindergartens, parks, fire and police stations, cultural infrastructure, and information about housing prices and exempted housing units from local taxes by block, as well as quantile regressions and bivariate Local Indicators of Spatial Association (LISA). The main results confirm the accessibility to local public services is unequally distributed among residents. However, it affects more low-income groups who are suffering from significant deficits in the provision of local public services. In this scenario, poor residents face a double disadvantage due to their social exclusion from urban systems and their limited access to essential services such as education, healthcare, or transportation. In particular, I found that social residential segregation might be reinforced by insufficient access to local infrastructure that the most impoverished population should assume.


2013 ◽  
Vol 37 (2) ◽  
pp. 141-159
Author(s):  
Justinas Bučys

A possibility from every location in an urban grid to easily access a range of shops and local services that meet the everyday needs, as well as workplaces, educational institutions and places for recreation is one of the biggest advantages of living in a city. This paper considers that combining tasks of encouraging the growth of local centres and developing street network in a way to promote walking and to provide conditions for using different modes of transport is one of the most appropriate ways to achieve urban sustainability. The problem addressed in this paper is the “separate” (i.e. “non-combined”) approach to functional and compositional aspects of the analysis of urban structure. The main proposal presented in this paper is to combine the two methods for analysing spatial and functional patterns. The first method deals with spatial configuration and how it is used by people, the second is aimed at investigating the role of urban composition at a macro and a micro scale in ensuring coherence of the elements of urban structure. The aim of the paper is to introduce the method for analysing the spatial structure of local centres in Vilnius and present the results which were obtained using the proposed model for investigating the interdependence of functional and compositional structures of the city. The scope of the study is to reveal some inconsistencies in the spatial patterns of three local centres in the north-western part of Vilnius where the distribution of the pre-determined functions and urban composition are in non-corresponding relation. Using the spatial accessibility model of Vilnius city, the study focuses on spatial structure at the level of urban blocks, which constitute local centres. The linear elements of the model are overlaid on a ground plan where convex spaces are highlighted considering their artistic and visual potential. Choice (betweenness, a measure of centrality) as a critical measure for analysing local centres is used to identify movement related structural patterns. Santrauka Galimybė iš bet kurios miesto vietos patogiai pasiekti kasdienius gyventojų poreikius tenkinančias prekybos ir paslaugų įmones, darbo ir mokymo įstaigas bei laisvalaikio leidimo vietas yra neabejotinas gyvenimo mieste privalumas. Lokalių centrų stiprinimo ir gatvių tinklo plėtros, sudarant sąlygas susisiekti pėsčiomis bei naudotis įvairių rūšių transportu, uždavinių derinimas sprendžiant veiksmingos, efektyvios urbanistinės struktūros formavimo klausimus yra viena iš pagrindinių darnios plėtros užtikrinimo priemonių. Straipsnyje keliama funkcinių ir kompozicinių urbanistinės struktūros analizės aspektų sujungimo problema. Siekiant išplėsti urbanistinės struktūros analizės galimybes, šiame straipsnyje siūloma kartu taikyti space syntax – viešųjų erdvių tyrimo – metodiką ir urbanistinės kompozicijos vaidmens lokaliu ir globaliu lygmeniu, užtikrinant urbanistinės struktūros elementų funkcinį ir erdvinį sąryšį, nustatymo būdą. Straipsnio tikslas yra pristatyti remiantis sudarytu miesto funkcinės ir kompozicinės struktūrų sąveikos tyrimo modeliu atliktą Vilniaus miesto lokalių centrų urbanistinės struktūros tyrimą, atskleisti taikytą metodiką ir gautus rezultatus. Tyrimo metu siekta nustatyti struktūrų prieštaringumus, kurie pasireiškia suplanuotų funkcijų išsidėstymo ir urbanistinės kompozicijos neatitikimu. Nagrinėti trys lokalūs centrai, esantys Vilniaus miesto šiaurės vakarų dalyje. Naudojant Vilniaus miesto viešųjų erdvių pasiekiamumo modelį, plane išryškinti lokalius centrus sudarantys kvartalai ir jų urbanistinės erdvės struktūra – linijiniai modelio elementai ir juos dengiančios vizualiai atskiros urbanistinės erdvės dalys, kurių meninio ir vizualinio potencialo įvertinimai išreikšti sutartiniais žymenimis. Apskaičiuotos prognozuojamą žmonių srautų pasiskirstymą gatvių tinkle atspindinčios pasirinkimo arba matematinio pereinamumo vertės.


Author(s):  
Nir Kaplan ◽  
David Burg ◽  
Itzhak Omer

Accessibility is fundamentally thought to be related to functional, economic, and social performances of cities and geographical systems and, therefore, constitutes an essential aspect for spatial planning. Previous studies focused on cities or metropolitan scales, often disregarding their position within regional and national systems, which can greatly affect their performance. Although accessibility at various spatial scales has been examined, the studies focused on accessibility patterns at different scales, with no reference to the level of accessibility of cities over local, regional, and national scales simultaneously, i.e. multiscale accessibility. This study aims to elucidate the multiscale accessibility level of individual cities and examine its relationship to urban performance in the urban system of Israel. Spatial accessibility was analyzed using the space syntax methodology for the entire national road network across multiple geographic scales—from the local to the national scale. Based on three distinct spatial accessibility systems identified, a unique multiscale accessibility profile was created for individual cities in Israel. Subsequently, each city’s multiscale accessibility profiles were examined against urban performance indicators determined from urban scaling theory. We found that the superiority of cities characterized by high accessibility level plays a role not only for a specific scale but also over scales and spatial systems. Moreover, most urban performance indicators related to the multiscale accessibility profiles of cities, while some multiscale accessibility profiles can be related to over- or under-performance of cities. The findings suggest that pervasive accessibility across spatial scales is inherently connected to urban performance and may indicate on the implementation and interpretation of accessibility. These findings may assist in various aspects of spatial planning at various scales.


2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Bartłomiej Kołsut ◽  
Tadeusz Stryjakiewicz

Abstract Aim of the study A centre-periphery structure reflects spatial inequalities in the level of economic development of countries and regions. Most often, it provides a simplified picture of spatial distribution of income or spatial accessibility. In this study the authors try to identify the relationship between the level of centrality/peripherality of an area and selected features of the personal car market, using the case of Poland. Method In order to identify the relationship between the level of centrality/peripherality of an area and selected features of the peresonal car market, the correlation and regression analysis has been used. As a dependent variable the index of centrality/peripherality consisting of population and enterprise income has been calculated for all Polish communes (gminas). The features of the car market (independent variables) are: 1) car ownership (number of cars per 1000 inhabitants), 2) sales of new cars, 3) the import of second-hand cars, and 4) the average age of personal cars. Result The research confirmed a positive correlation between the index of centrality/peripherality (and hence the central character of the commune) and the sales of new automobiles, and a negative correlation with the average age of cars. There is no correlation between the level of centrality/peripherality of an area and the indicators of car ownership and the import of second-hand vehicles.


Sign in / Sign up

Export Citation Format

Share Document