Composite indicators of sustainable urban mobility: Estimating the rankings frequency distribution combining multiple methodologies

The contribution of this paper consists in applying several techniques to estimate a composite indicator of sustainable urban mobility for 116 Italian provincial towns, as proposed by Luzzati and Gucciardi (2015). The aim is to provide the decision-maker with a richer set of information on sustainable mobility, making explicit the impact of the techniques used on the values obtained. A set of 16 indicators with a nested structure has been selected and 33 combinations of normalization, weighting, and aggregation techniques are applied. The results are presented by city, by city groupings (size and location), and focusing on the ten largest Italian cities. It is found that small cities perform better in terms of sustainable mobility than medium or large cities. As expected, in some cases (e.g., Milan) the intervals of the results obtained are quite large, indicating that the techniques used to normalize, weight, and aggregate the indicators highly affect the performance indexes. In other cases (e.g., Rome) the results are stable across methodologies.     

The impact of urban features in cycling potential – A tale of Portuguese cities

While the bicycle is commonly understood as a suitable alternative to fulfil most of urban mobility needs, adoption rates of this transport mode vary considerably among urban areas. Those at early stages of adoption, identified as starter cycling cities, face numerous challenges, reducing the effectiveness of policies and strategies. Much research has been dedicated at identifying social and physical environment conditions favouring the use of the bicycle. Assuming cycling potential results of a good combination of physical and socio-demographic factors, we set out to identify dominant contexts generating high levels of cycling potential. The previously developed Gross Potential for Cycling is applied to 21 Portuguese municipalities of different spatial contexts. By looking at the particularities of different typologies of urban territories, a set of k-means clustering analyses investigates which combination of factors contribute to the establishment of a high cycling potential.The results indicate that, in the set of case studies, high accessibility to schools and urban centralities are common in high cycling potential areas, regardless of spatial context. Three clusters were identified from the combination of the age profile of residents and the connectivity features of the territory, defining the main typologies of high cycling potential areas. As different urban typologies pose distinct configurations on the performance of the different evaluated indicators, these outcomes are crucial to inform policy makers on where to prioritize investment for the establishment of a new cycling culture.     

Pre-schoolers' transport imaginaries: Moving towards sustainable futures?

Being on the move is part of children's everyday life in cities. However, little is known about how young children experience transport systems or their aspirations for mobility in cities. In this paper, we explore pre-schoolers' experiences with the mobile world and show their affinity with different transport modes and hopes for their current transport system. We draw on a participatory research project that engaged children in class discussions, a tile-based city building exercise and neighbourhood walks. Findings suggest that although the voices of children aged 3–5 years are absent in mobility or transport debates, children are fascinated by mobility and transport related activities and services. Pre-schoolers from Dunedin, New Zealand, though recognising a predominantly motorised transport system, also showed creative or alternative modes making their way into their own transport systems. In this paper we argue that children should be introduced to and experience alternative modes of transport in the early years to allow for more imaginary transport geographies creating greater support for more sustainable, liveable urban environments for all ages.     

Livelihoods in motion: Linking transport,mobility and income-generating activities

During the past decade, there has been an increased focus on mobility in the social sciences linked to the so-called ‘mobility turn’, which claims that as mobility is so pervasive it should not be viewed as a rupture in society but as a normal way of life. This is certainly the case in urban contexts of sub-Saharan Africa where mobility forms an integral part of livelihood and income-generating activities. Drawing on in-depth qualitative research conducted in Accra, the capital of Ghana, this paper explores the mobility of urban residents in differing parts of the city in relation to their livelihood strategies. Through illustrating the ways in which the mobility of urban residents is aided or hindered by Accra's transport system, and by examining how this in turn influences their livelihood strategies, the paper contributes to an alternative new mobilities paradigm that is more considerate of, and builds upon insights from, the global South where such research has a longer pedigree than in the global North.     

Urban transport justice

Many cities in the world seek to establish more sustainable urban transport systems with a view to reduce accidents, congestion, air and noise pollution, and to improve social interactions, liveability and amenity values. Against this background, this paper frames urban transportation as an issue of justice: contemporary transport systems are characterized by injustice, as they tend to favour and prioritize motorized transport, accepting that considerable environmental and social burdens are put on more sustainable forms of transportation, other traffic participants and society as a whole. To conceptualize ‘urban transport justice’, the paper discusses three dimensions where injustices are apparent: Exposure to traffic risks and pollutants; distribution of space; and valuation of transport time. It is argued that public and political recognition of urban transport injustices provides significant argument for changes in urban planning, transport infrastructure development and traffic management.     

Assessing equity in transport accessibility to work and study: The Bogotá region

This research was aimed at exploring levels of equity in accessibility to employment and education in the city-region of Bogotá, Colombia's capital city. Building on consolidated methodologies for the assessment of potential accessibility, we estimate accessibility indicators at the zone level, evaluate how potential accessibility varies among income groups, and present evidence related to transport mode, in order to analyze social and spatial inequalities produced by the distribution of accessibility to employment and education activities. The research incorporates a method to evaluate how accessibility varies among zones according to average income and mode of transport in order to produce evidence-based arguments that can inform transport policy in the city-region of Bogotá, and other similar contexts in the Global South. Our results show strong distributional effects of the socio-spatial and economic structure of the city-region, its transport infrastructure and services, and the effect of current transport and land-use policies for citizens of different income groups. The tools and empirical evidence in this research seek to contribute to informed policy development in Latin America and other developing contexts, and feeding current debates on the role of accessibility in addressing social and spatial inequalities stemming from urban mobility.     

Assessing cumulative environmental effects from major public transport projects

The conventional assessment of proposed major UK transport schemes has not served to highlight well the induced and interacting nature of environmental impacts. This article identifies links between Strategic Environmental Assessment (SEA) and Environmental Impact Assessment (EIA), using the Cross River Tram in London as an illustrative case study. From a literature review and local authority interviews, a framework and recommendations for the assessment of major transport projects are set out. For transport projects where environmental and land-use impacts are likely, it is suggested that Cumulative Effects Assessment (CEA) has the potential to make a strong positive contribution to the assessment of transport projects for sustainable urban development.     

Local accessibility inequalities and willingness to walk in Latin-American cities: Findings from Medellín,Colombia

As planning for accessibility is becoming a priority for most cities, policies encouraging short-distance traveling and the use of active modes of transport are gaining force. Emphasizing short-distance travel and localized practices can produce positive sustainable outcomes, but in order to design proper public policies, a deeper understanding of the determinants of this mobility of proximity is still needed. This paper uses mobility data from the city of Medellín, Colombia, to examine the role of local accessibility and the proximate scale in the city's everyday mobility. The analysis aimed at testing whether significant efforts on improving local conditions and fostering local mobility would help to improve social exclusion and transport disadvantage situations by alleviating the need of motorized and long-distance transport. Unlike most traditional analysis, proximity is not defined by Euclidian distance but instead using travel and modal choice variables. Results show the relevance of socioeconomic variables at determining travel behaviors as well as the importance of local accessibility for social groups in situations of transport disadvantage.     

Assessing the role of the built environment and sociodemographic characteristics on walking travel distances in Bogotá

Planning for more sustainable mobility is an important goal for public authorities worldwide. Setting better conditions for pedestrians and cyclists has been related to many social benefits, such as less pollution and congestion. Local authorities, aware of the relationship between transport and land-use, are adopting planning tools to analyze growth in cities and their impacts using multiple indicators. This paper develops an econometric trip length model that correlates socioeconomic characteristics and built environment conditions with walking travel distances in the city of Bogotá, Colombia. A log-linear regression model was estimated using information for 2015 of Bogotá's household travel survey, along with data of employment and population by block obtained from official sources. The built environment component of the model serves to evaluate the effect of land-use patterns. A proof of concept was developed using land-use information extracted from a Cellular Automata Land-Use model calibrated for the city. From its results, some factors of the built environment were estimated and two scenarios were tested in this study. One depicts the average walking distance for households surveyed in 2015, and the other takes a simulation of land-use policy in developing a new urban area as an input. The results indicate that people living in areas were the land-use mix and job/population ratio are low, tend to have longer walking distances, suggesting the need to implement special policies that reallocate some activities and encourage higher land-use mix in the urban periphery where low-income households tend to be located. The proposed method can identify the impact of land-use policies in the distances traveled by walking, facilitating the impact assessment of land-use regulations.     

Accelerating sustainable mobility and land-use transitions in rapidly growing cities: Identifying common patterns and enabling factors

Urban growth has been increasing rapidly across the globe, in particular in low and middle-income developing countries. As city populations and GDP per capita rise exponentially, cities tend to experience similar challenges related to urban development and transport/mobility.One of the most problematic issues emerges when urban growth drives car-oriented urban development. This is characterised by a range of unsustainable patterns such as low-density development, urban sprawl, lack of plans and infrastructure to accommodate collective transport and active travel, and significant efforts and investments to meet the demand for private motorised vehicle use. For emergent cities, the risk is that these developments lead to highly inefficient, unhealthy and unsustainable urban systems that are difficult to remedy.This paper aims to identify recurrent governance and policy factors across sectors, as well as macro factors, that tend to contribute to car-dependent urban mobility systems in rapidly growing cities. It draws on qualitative and quantitative research findings from five under-researched Eastern European and Middle Eastern cities: Tallinn, Bucharest, Skopje, Adana and Amman. Data examining the evolution of urban mobility in these cities were collected as part of the Horizon2020 EU funded project CREATE.The paper investigates the extent to which car-dependent urban development processes can be avoided in rapidly growing cities, to support transitions towards liveable and sustainable cities. Finally, it provides policy recommendations targeting growing cities with low levels of car-use, in particular in Sub-Saharan Africa. It highlights the importance of acting swiftly to achieve targets such as the Sustainable Development Goals, the New Urban Agenda or the Paris Agreement, by supporting policies fostering efficient, sustainable and inclusive urban mobility and land-use across sectors and levels of governance.     

Transport,urban development and the peripheral poor in Colombia — Placing splintering urbanism in the context of transport networks

In rapidly growing cities the evolution of utility and communication infrastructures has enabled the creation of ‘premium networked spaces’ exclusively for wealthier groups thus deepening already large social inequalities. By the same token, in a context of spatially concentrated income-earning opportunities and other urban functions, as well as limited purchasing power, accessibility to adequate means of connectivity with the rest of the urban fabric can be a determining factor in overcoming conditions of poverty for residents in physically marginal areas.Within the framework of the splintering urbanism thesis, and using the case study of Soacha, a municipality adjacent to Bogotá, Colombia's capital city, we examine the apparent mismatch between the growth of low-income informal settlements in peripheral locations and the development of transport networks in the period 2000–2010. Our aim is to identify the effects on social and spatial marginalisation of an uneven provision of material infrastructures and services for mobility. We identify central elements in the structure of the networks of connectivity between Bogotá and Soacha, highlighting the main gaps that lead to a fragmented set of connections. We develop a set of criteria for planners and policy makers searching for a more informed analysis of transport supply and policy development practice for poor peripheral populations in similar regions and contexts.     

Night-time mobilities and (in)justice in London: Constructing mobile subjects and the politics of difference in policy-making

The growing interest in urban night-time economies and night-time transport policies presents an important context in which to examine how mobility justice is conceived and operationalised in policy-making. Literature on transport exclusion and transport justice documents the disadvantages experienced by different social groups and advances theoretical frameworks for distributive justice and transport accessibility. However, this literature has rarely considered the politics of whether and how mobility difference is recognised and planned for in transport policy, including issues of deliberative justice (participation) and epistemic justice (knowledge production). To address these research gaps, this paper engages with Sheller's (2018) theorisation of mobility justice and critically analyses the construction of mobile subjects in policy discourse on night-time mobility. We analyse policy documents part of night-time policy for Greater London to examine the extent to which the differentiated night-time mobilities across social categories (gender, age, ethnicity, income, etc.) are recognised – in other words, how the ‘politics of difference’ play out in transport policy-making. Findings show that the discursive construction of mobile subjects in London's night-time policy distinguishes between workers, consumers, and transport users, yet, these broad categories poorly account for differentiated mobility needs and practices. Publicly available data on differentiated night-time mobilities in London does not inform current policy discourse, obscuring disadvantages experienced by different groups of people moving through the city at night, and thus limits the capacity of existing policy interventions to address mobility injustices. These findings reaffirm the need for transport research to move beyond distributive justice and accessibility analysis, towards exploring the potential of thinking about distributive and epistemic justice for challenging the status quo of transport policy.     

Accessibility,mobility, and realized travel behavior: Assessing transport disadvantage from a policy perspective

Limited accessibility and mobility can result in decreased quality of life and well-being, as well as social exclusion. In the United States (U.S.), rural and small urban communities suffer from transport disadvantage due to a lack of transit and a low density of employment, education, recreation, and other opportunities. While the international literature has produced a number of methods and frameworks to assess transport disadvantage and its impacts, the U.S. has lagged behind in providing pertinent studies. The objective of this paper is to establish comprehensive measures that can support the identification, evaluation, and quantification of transport disadvantage in U.S. rural and small urban communities, considering both data availability and the unique characteristics of the U.S. The concept of transport disadvantage in this paper denotes the disadvantage of a specific population group or area that results from a difficulty accessing transportation and/or opportunities. To achieve this objective, this paper develops a spatial multi-perspective approach to account for the three essential elements of transport disadvantage: accessibility, mobility, and realized travel behavior.The developed approach provides an assessment of transport needs and need gaps that can be of benefit to small urban and rural communities and their planning practices, as well as to transport providers. The analysis in this paper suggests that—from a policy perspective—a combination of measures that account for all three essential elements of transport disadvantage should be considered, because the results of each measure complement those of the others. This paper illustrates the proposed approach using a case study of Indiana. The findings suggest that a great part of rural and small urban Indiana presents a low density of opportunities and that transport-disadvantaged residents of such areas might experience the impacts of low transit supply as well. In addition, the findings suggest that residents of rural and small urban areas travel longer distances on their day-to-day activities.This paper attempts to advance the national research pertaining to transport disadvantage and provide a framework that can support planning and policy decisions at the community as well as at the state level.     

Transport mode choice in South East Asia: Investigating the relationship between transport users’ perception and travel behaviour in Johor Bahru,Malaysia

The worldwide increase in private car dependency poses a set of significant environmental, economic and social sustainability challenges that continue to undermine the urban quality of life. Rapid motorisation, particularly in South East Asia (SEA), has emerged as a global concern given the region’s cumulative population, rate of industrialisation, and large-scale urbanisation. Thus, there is a compelling need to enhance our understanding of the underlying dynamics of how people perceive and use transportation such that transport planning is better placed to address the current, unsustainable travel patterns in SEA. Despite this need, there has been relatively limited SEA-based research that has endeavoured to examine travel perceptions and transport mode choice from a non-instrumental perspective. This research redresses this deficit by investigating the relationship between transport users’ perceptions and travel behaviours within SEA, with a particular focus on psychosocial drivers of transport mode choice interfaced with more traditional instrumental measures.Spatially stratified survey data have been collected in a case study area, Johor Bahru, Malaysia, comprising users from different transport user groups. Employing regression modelling, drivers of individual’s travel behaviour are examined. Results highlight the merit in recognising the role of non-instrumental motives alongside instrumental motives to explain transport mode choice. We conclude by highlighting that transport mode choices are motivated by a range of locational, socio-demographic, psychological and cultural determinants. The current research has contributed to a better understanding of transport mode choice in Johor Bahru and provides a foundation for future SEA-based travel behaviour research. Studies in this area can inform more sustainable travel behaviour in the SEA region.     

Survey of E-scooter users in Vienna: Who they are and how they ride

In many cities around the world, electric (e-)scooters have emerged as a new means of transportation. They are often advertised as supporting modal shift towards more sustainable transportation and as a tool for enabling more equity in mobility. However, the environmental impact depends on how they are used and what kinds of trips they replace. Integration of e-scooters into urban transport systems also implicates discussions on fair road space allocation. In our study, we assess the socio-economic profiles and usage patterns of e-scooter users in Vienna, Austria. We differentiate between two basic groups of e-scooter users (renters and owners) and apply two different methods. Firstly, based on an online survey, we examine the age, gender and education of e-scooter users and we look into which kinds of trips (commuting, shopping or leisure) and which other means of transportation are replaced by e-scooter trips. Secondly, we analyse data from field observations at cycle paths in Vienna in order to determine the share of e-scooter riders and their gender distribution. We find that e-scooter users are more likely to be young, male, highly educated and residents of Vienna. According to the survey, there are considerable differences in usage between owners of private scooters and users of sharing schemes. Whereas in both groups, e-scooter trips mostly replace walking and public transport as a mode, e-scooter owners also show a considerable mode-shift from private car trips. These results implicate that e-scooter riders are additional users of cycling infrastructure. This puts further pressure on the current allocation of road space, which provides little space for active modes of transport. We conclude that city policies should address this competitive relationship adequately by allocating more space to safe and convenient cycling infrastructure and traffic-calmed zones. This could not only help ease the current challenges due to e-scooters but also provide better conditions for walking and cycling and thereby at the same time contribute to a more sustainable and equitable urban transport system.     

Rationalities and materialities of light rail scapes

Light rail is a modernisation of old tram systems and a popular tool in urban development strategies throughout many European cities. Light rails continue to be built despite often having poor socio-economic returns — other similar modes could provide the same transport function at a lower cost. Through a case study, this article explores the main vision and rationalities behind light rail projects in two mid-sized European cities — Bergen and Angers — and considers how this vision has materialised in various ‘light rail scapes’. The article argues that the city shapes the light rail project, but also that the light rail re-configures and shapes the urban structures, design and planning practices within the city based on its materiality and spatial interaction with it. This means that light rail projects need to be rethought as complex urban development projects instead of just simple ‘pieces of infrastructure’. Ultimately, this work seeks to shed light on a number of ideas for future light rail research and practice.     

Understanding the value and vulnerability of informal infrastructures: Footpaths in Quito

Walking remains the primary means of travel in informal settlements of the Global South because of the limited ability of municipal governments to provide formal transport infrastructure. To cope, residents create footpaths through a bottom-up approach. Using a case study of informal settlements in Quito, this paper offers the first study of the process through which people settled in these spaces shape footpaths as informal walking infrastructures to enable everyday mobility. The paper draws on data collected over an eighteen-month period from archives, field notes from participatory observations, records of in-depth interviews, and interviews “on the go” with pedestrians to show how this infrastructure enables informal settlements' residents to access everyday destinations in shorter times, less expensively, and (often) more safely than alternatives. We show how these informal infrastructures build on centuries old practices of collective footpath building that form an essential part of local culture, and how urban processes and infrastructural development in the core city shape the production, transformation and disappearance of footpaths in informal settlements. Significantly, these findings contribute to a fuller understanding of the value and vulnerability of informal infrastructures that can inform wider studies of walking and informal infrastructure. The paper concludes by identifying the challenges and opportunities to promote informal infrastructures as a mainstream element of mobility in the city and support a more sustainable path to urban development.     

Access to the city: Mobility patterns,transport and accessibility in peripheral settlements of Dar es Salaam

This paper is concerned with access to the city for urban residents living in the periphery of Dar es Salaam, Tanzania. The paper presents an analysis of the mobility practices of residents and investigates the mobility constraints they experience in relation to the limited accessibility provided by the urban transport system. The paper draws upon qualitative interviews with residents in the periphery as well as recently collected travel speed data and offers a unique combination of testimony with GIS-based modelling of overall accessibility. A central finding is the overall importance of regular mobility and access to the city for residents in the periphery. Regular mobility is an ingrained part of residents' livelihood strategies. The majority of households rely on one or more members regularly travelling to central parts of the city in relation to their livelihood activities. The analysis reveals a widespread, near-to-universal, dependence on motorized transportation, with the vast majority depending on public transport. Raster-based modelling of overall accessibility provides an indication of the very high travel times endured by residents in the periphery. The analysis identifies and distinguishes between three overall mode types: 1) Private car, 2) public transport and 3) motorcycle/car combined with public transport. While private cars appear marginally faster, differences in travel times are actually limited. This suggests that travel times are less influenced by mode of transport than by road and traffic conditions and highlights how accessibility problems of peripheral settlements are not easily understood separately from the general dysfunctions of the overall mobility system of city.     

Effective regulation for sustainable public transport in developing countries

This paper has two key objectives. Firstly, using the findings from case study research undertaken in Colombo (Sri Lanka), Faisalabad (Pakistan) and Dar es Salaam (Tanzania), the paper seeks to demonstrate the importance of an appropriate regulatory framework and effective mechanisms of enforcement for sustainable urban transport systems in developing countries. Secondly, the paper highlights the critical importance of communication and co-ordination between stakeholders (defined here as transport users, providers and regulators) if regulation is to be effective. The views of poor and disadvantaged passenger groups—women, children, the elderly and disabled—are used in the paper to illustrate the importance of transport systems to their livelihoods, such as work, education, health and social pursuits. The case studies suggest that in the context of the failure of both the fully regulated public transport sector and the completely deregulated sector self regulation is a potentially useful alternative. In practice, self regulation has been achieved in the case study locations through the formation of cooperatives or associations of stakeholders such as users and operators.In the conclusion, the paper makes two key points. Firstly, that regulation must be open, honest and effective, but not so detailed or ‘heavy’ that it incites the potential for corrupt practices.Secondly, communication and co-ordination between stakeholders is critical if any form of regulation is to be effective—owners', employees' and passengers' associations have a vital role in this regard, as do Transport Forums consisting of all stakeholders. The participation of stakeholders and real and effective consultation are more important in the case of self regulation of public transport service provision than in other regulatory regimes.     

Achieving sustainable urban transport mobility in post peak oil era

Peak oil is the term used to describe the point at which global oil production will peak and thereafter start to decline. Recognising that transport uses a significant portion of global energy, the shortage of fossil fuel in post peak oil era will pose a global challenge in the transport sector. The paper presents an assessment of international research to illustrate the possible time frame of peak oil. It investigates the key implications of the oil shortage that threaten to render the urban transport system of Australia ineffective. Synthesis of documented research evidence suggests three major implications in the urban transport sector: (1) a reduction of mobility for individuals, (2) an increase of transport disadvantage, and (3) a disruption of urban freight movement. In addition, the paper explores strategies to cope with the devastating effects of the shortage of the fossil fuel in the post peak oil era. A number of strategies to achieve sustainable mobility in the future urban transport system are presented. These strategies are summarised into three main themes: (1) a mode shift to alternate transport modes, (2) an integration of land use and transport planning, and (3) a global technical effort for alternate fuels and vehicles. It is expected that a concerted global effort in this regard can have a far-reaching effect in achieving sustainability in urban transport mobility.