Key research themes on governance and sustainable urban mobility

ABSTRACT

This article discusses the governance of sustainable urban development and in particular assesses the role of policy instruments to promote soft forms of governance associated with persuasion and coordination. These instruments are critically examined in terms of how they might help to promote greater policy integration and more sustainable development. Five types of strategies for promoting more sustainable transport policies are discussed: (1) policy indicators and targets, (2) benchmarking, (3) policy transfer and best practices, (4) policy experimentation/innovation, and (5) visioning/envisioning. The article is divided into four main parts. First, it presents an overview of recent trends in the governance of urban transport. Second, it examines the notion of policy integration, a central theme in discussions about sustainable transport and governance. Third, it considers how selected types of policy instruments might contribute to policy integration and sustainable urban development. Fourth, alongside the conclusions, suggestions are made for new research related to policy instruments and soft forms of governance in relation to urban transport.     

Key research themes on ICT and sustainable urban mobility

Abstract

Information and communication technologies (ICTs) are hypothesized to replace or change the use of the transport system by facilitating new or different activities. This article offers a review of more than 40 years of research regarding the relationship between ICTs and urban mobility. We discuss the expectations for the changes in travel demand, travel patterns, and the urban form as a result of the development and introduction of ICTs. Much of the interest in the relationships between ICTs and mobility is premised on the expectation of substitution effects, but empirical findings often suggest more complex effects than direct substitution. Although research on single types of travel activity may sometimes indicate simple substitution effects, examination of the broader impacts may also reveal travel generation effects as well. As such, ICTs do not simply substitute mobility patterns but change them. A growing body of research focuses on changing mobility patterns (in terms of time and space), changes in the experience of travel and changes in the perceptions of travel costs due to the interaction between old and new technologies for overcoming distance. ICTs are gradually becoming embedded within the transport system, enabling flexibility, multitasking, and an increase in human activities.     

Key research themes on regulation,pricing, and sustainable urban mobility

ABSTRACT

This article considers both theoretical arguments and practical experience regarding a range of urban pricing and regulation policies, namely road pricing, public transport pricing and regulation, car parking policies, home and low-emissions zones, and regulation and subsidies to bring about cleaner vehicles. It concludes that effective urban transport policies require a consistently structured package of measures, and that the most urgent research needs surround the design of such measures to achieve their objectives while being financially sustainable and attracting public and political support.     

Key research themes on travel behavior,lifestyle, and sustainable urban mobility

abstract

The concept of lifestyle adds a behavioral component to travel models that used to be dominated by engineering and econometric traditions. This article presents an overview of how lifestyle is defined and measured in transport studies, and how travel behavior is influenced by lifestyles. Lifestyles are often used pragmatically rather than theoretically in the behavior studies. Nevertheless, some important theoretical contributions have been made, especially in sociology by scholars such as Weber, Bourdieu, Ganzeboom, and Schulze who agree on the communicative character of lifestyles: individuals express their social position through specific patterns of behavior, consumption, and leisure. These behavioral patterns are shaped by underlying opinions and orientations, including beliefs, interests, and attitudes. Thus, travel behavior is not simply determined by price, speed, and comfort but is also related to attitudes, status, and preferences. Because lifestyle has many different dimensions, a variety of measurement approaches exists. Nevertheless, most studies suggest that travel behavior is conditioned by specific lifestyles. How lifestyles themselves can be modified to promote more sustainable patterns of transport has not received much attention to date. This article argues that lifestyles need to be considered as dynamic rather than as static and given, and that future research could delve more deeply into this area.     

Identifying key research themes for sustainable urban mobility

ABSTRACT

A comparison of various research agendas for transport and sustainable development from the last two decades reveals a number of common themes that are just as important now as when they were first suggested. Although the research questions and approaches have changed, many key issues have remained relatively fixed. Key issues such as information and communications technology, urban space and scale, lifestyle and behavior, regulation and pricing, and institutions and governance persistently recur and seem likely to remain on the transport research and policy agendas for the foreseeable future. This article summarizes some of the key developments and opportunities related to these five research themes.     

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.     

Dually sustainable urban mobility option: Shared-taxi operations with electric vehicles

Electric vehicles (EVs) are energy efficient and often presented as a zero-emission transport mode to achieve long-term decarbonization visions in the transport sector. The implementation of a sustainable transportation environment through EV utilization, however, requires the addressing of certain cost and environmental concerns such as limited driving range and battery-charging issues before its full potential can be realized. Nevertheless, a specific type of use of EVs, namely in taxi services, may elicit positive public opinion, as it promises a commitment toward sustainability in urban life. In light of this, this study proposes an integrated approach that combines EV operation with a conceptual design for shared-ride taxi services. As some productivity loss may be naturally expected due to the time spent in charging, it is important to look at whether such performance loss from the passenger and system standpoints can be offset with ingenuity in operational design. In this study, an EV taxi charge-replenishing scheme that can be coupled with a real-time taxi-dispatch algorithm is designed. The proposed EV charging schemes for taxi services are studied via simulations and the effects of the limited driving range and battery-charging details are examined from a system performance viewpoint. The simulation study also reveals illustrative results on the impact of the EV taxi fleet's operation on the charging system. Next, a real-time shared-taxi operation scheme that allows ride sharing with other passengers is proposed to maximize the operational efficiency. The simulation results suggest that the shared-taxi concept can be a viable option to improve on the limitations caused by EV operation. In addition, the importance of projected charging demands and queue delays at different charging locations are also addressed. Some limitations and a future research agenda are also discussed.     

Multiple views of sustainable urban mobility: The case of Brazil

The aim of this work is to identify key factors of a sustainable urban mobility concept in a particular context. A multiple criteria decision analysis method was developed to identify the main variables associated to the concept. Looking at the results obtained in 11 cities of the five Brazilian regions, we conclude that the method is able to capture the different views and approaches discussed in the formulation of the mobility concept. Therefore, it can be used as a starting point for the formulation of public policies and also in the development of tools designed for monitoring the mobility conditions.     

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.     

Analysis on spatiotemporal urban mobility based on online car-hailing data

As an emerging travel mode, online car-hailing plays an increasingly important role in people's daily travel. Car-hailing data provide a new source to study human mobility in urban areas. This study focuses on identifying the distribution of regions with high travel intensity and the correlation between travel intensity and points of interest (POIs), based on the online car-hailing data collected in Chengdu, China. Firstly, the whole city area was divided into 16,100 uniform blocks and the number of pick-up and drop-off activities in each block was counted. Then, all POIs were categorized into 13 types and the number of different types of POIs in each block was counted. On this basis, the grade of travel intensity and POIs density in each block was identified according to the number of travel activities and POIs respectively. Finally, the correlation between the travel intensity and the POIs density was explored with ordered logistic regression. Experiment results showed that regions with high travel intensity are mainly distributed within the Second Ring Road, while those in the suburbs of city are usually the large transportation hubs, such as airports and train stations. Different types of POIs have different impacts on the online car-hailing travel intensity, and the density of traffic facilities has the greatest impact, including pick-up and drop-off, followed by density of scenic spot. The densities of service facilities and sports facility have an impact on the intensity of pick-up, while the impact on the intensity of drop-off is not significant. The density of company has no significant impact on the intensity of neither pick-up nor drop-off. These findings can contribute to a better understanding of online car-hailing travel activities and their relation with the urban space, and can provide useful information for urban planning and location-based services.     

The role of road safety in a sustainable urban mobility: An econometric assessment of the Spanish NUTS-3 case

There has been a structural change in mobility in major Spanish cities in recent decades, with a switch to the pattern followed in other countries in the area. A shift has taken place from a traditional Mediterranean model to a North American city stereotype, with uncontrolled motorization and major implications for public health. This article specifically analyzes negative road safety-related externalities that result from this process, given that the trend seems to show a steady decline in road safety accidents on urban roads in Spain, with major differences among NUTS-3 provinces. The objective is to evaluate the factors that empirically explain these differences for the 2003–2013 period using a panel data analysis. Results show that a key role is played by urban development variables, such as population density and improvements in health services, with advances linked to more accessible and sustainable urban transportation, such as the Smart City concept. Not only does this article close a gap in the literature, but the findings can also serve as a practical guide for the development and implementation of urban mobility and road safety plans, and reveals the special needs of the most vulnerable groups.     

Strategies for sustainable urban and transport development in Nigeria

A transportation system can enhance the productivity and quality of life of a community if properly planned and managed. At the same time, development stimulates demand for transport. This paper looks at urban development and the transport system in Nigeria and finds that conflicts exist between them. The paper then tries to analyse these conflicts with a view to understanding their causal agents in order to address them. Finally, the paper proposes some strategies that could be adopted to resolve the conflicts and put in place sustainable urban development and transport system in Nigeria.     

Life events and mobility milestones: Advances in mobility biography theory and research

The concept of mobility biographies has recently gained considerable currency in social-scientific transport research, reflecting increasing awareness of the long-term development of mobility practices. To complement existing work on the effects of major life events on mobility practices, we introduce the novel concept of ‘mobility milestones’, that is, mobility-related events across the life course that show a very high dependence on (infra)structural factors. Overall, the paper explicitly recognises the centrality of interactions between structural factors and human agency, thereby moving beyond a sole focus on individual travel behaviour.Initially, this paper reviews social and interdisciplinary research on mobility biographies, especially studies that use retrospective survey methodologies. Building on this review, we present an innovative online survey tool that has been deployed on the island of Ireland (n = 324) to record changes in individuals' mobility biographies and their connections with both life events and mobility milestones. This is followed by a discussion of key findings regarding the impact of starting college, residential relocation and changing employment, as well as buying a car or bicycle or getting a driving licence on individuals' modal choice.     

Rail freight and sustainable urban distribution: Potential and practice

How far can rail freight developments reduce lorry movements and promote sustainable urban distribution when planners discard economically infeasible projects? To expand current dedicated bulk long rail hauls, marginally viable, from Plymouth, UK, potential rail traffics must tap capacity to treble output and cut unit costs. Potentially, aggregated inter-county bulk road movements imply viable train hauls from upgraded railhead facilities. Optimal configurations of enhanced loading, storage and processing facilities and port-railhead links proffer reduced ship demurrage costs with upgraded port handling and relocated petroleum-loading facilities creating employment and further reducing lorry movements. However, in practice, non-viable developments are not sustainable.     

Making urban road pricing acceptable and effective: searching for quality and equity in urban mobility

Urban Road Pricing has been proposed many times as a powerful instrument to fight congestion in urban traffic, but has systematically faced a hostile political envirionment, due to lack of confidence on its promised (traffic) results and fear of its political consequences. Lack of action in this front is contributing to stable or even growing congestion problems in most large cities.This paper tries to address the problem with a fresh look at the objectives of road pricing and at the reasons for that political hostility. For managing and developing the urban mobility system, efficiency and equity are normally taken as the basic economic objectives. Sustainability objectives may be integrated in the efficiency objective if we are able to represent adequately the costs of the resources consumed in the process. Political hostility is normally based on having to pay for what was freely available, and on the risk of exclusion for those with little revenue available for the extra cost of driving into the city.Pursuit of efficency leads to suggestion of marginal social cost pricing but this is hard to explain to the public and application of this principle is fraught with pitfalls since some components of that cost get smaller as traffic grows (noise related costs for example). Pricing is still a good option but the objective has to be something easier to understand and to serve as a target for mobility managers. That “new” objective is quality of the mobility system, with a meaning similar to that of “level of service” in traffic engineering, and prices should be managed to across space, time and transport modes in such a way that provision of service is made with good quality in all components.Pursuit of equity leads to some form of rationing, which has often been associated with high transaction costs and abuse by the administrators. But the use of electronic road pricing should allow easy ways to address the rationing process without such high costs. The basic proposition is that all local taxpayers receive as a direct restitution of their tax contribution a certain amount of “mobility rights”, which can be used both for private car driving in the tolled areas and for riding public transport.These principles are easily applicable with a variety of technical solutions for road pricing, from the simplest cordon pricing to the more sophisticated “pay-as-you-go” schemes. The paper addresses this question of implementation and argues for increasingly sophisticated schemes, as people get accustomed to the principles and finer targeting of demand segments may be needed.     

Economies of scale and density in urban rail transport: effects on productivity

This paper examines economies of scale and density in urban rail transport. It isolates the effects of constant and non-constant returns on output and productivity growth using data relating to 17 rail systems in cities around the world. Estimates reveal constant returns to scale but increasing returns to density. The productivity model shows that total factor productivity change has been of great importance in differentiating the output performance of urban rail systems. Our analysis of average labour productivity confirms the importance of shifts to other factors of production and technological change in explaining changing levels of output per worker.     

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.