International Journal of Sustainable Transportation


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Publications in this journal

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    ABSTRACT: With increasing concerns on environmental and energy issues in many large Chinese cities, local authorities are introducing public bicycle schemes for promotion of using green transportation modes. This paper proposes a novel model for investigating the effects of the public bicycle schemes in a congested multi-modal road network with auto, bus and public bicycle travel. The decision-making process of travelers on travel mode and route choices is assumed to follow a hierarchical choice structure. The effects of pollution emissions by motorized vehicles (i.e. auto and bus), crowding discomfort in buses, and riding fatigue by bicycles are considered in the proposed model. The multi-modal travel choice equilibrium problem is formulated as an equivalent variational inequality problem. The existence and uniqueness of the solution of the proposed model are examined. A heuristic solution algorithm which combines a diagonalization approach and the method of successive averages is adapted to solve the proposed model. A numerical example is given to illustrate the application of the proposed model and solution algorithm. Insightful findings are reported on the effects of the public bicycle schemes and emission tax policy on the multi-modal transportation system. The optimal public bicycle rental price and emission tax for maximization of social welfare can also be determined by the proposed model.
    International Journal of Sustainable Transportation 05/2015; 9(4):282-297.
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    ABSTRACT: This paper investigates the influence of both mobility events and household events on modal shift decision for bicycle commuting using data collected from a retrospective survey in the Netherlands. The results from a mixed logit analysis illustrate the influence of several life events on commute modal shifts in addition to changes in commute time and socio-demographic variables. Job characteristics such as changes in work status and employer, mobility resource, long-term mobility events, and household events are seen to influence commuting decision by bicycle.
    International Journal of Sustainable Transportation 11/2014;
  • International Journal of Sustainable Transportation 11/2014;
  • International Journal of Sustainable Transportation 08/2014;
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    ABSTRACT: In order to determine the level of satisfaction of the public transport services, the passengers jointly evaluate the various attributes that represent the different aspects of the level of service. From a methodological viewpoint this means finding the weighting that individuals use to evaluate those attributes within what is considered as the level of global satisfaction or utility. In this paper we obtain indicators that permit the aggregate measurement of the quality of the public transport bus services on Gran Canaria in Spain. The analysis focuses on obtaining the preferences using designs of Stated Preferences (SP) that give the individual the choice between the current service and a hypothetical service defined, from a combination of the most relevant variables. With this information multinomial logit models are estimated that permit us to obtain a linear representation of the utility function parameters, from which a measure of the global quality of the service is obtained. The results of the analysis demonstrate that passengers have clearly different behaviour, depending on whether they are urban or interurban users; this is especially relevant in their perception of certain attributes such as frequency, and to some extent the willingness to pay relative to the components of total travelling time.
    International Journal of Sustainable Transportation 01/2014; 28(1):28-46.
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    ABSTRACT: A methodology originally developed to predict vehicle emissions was applied to prediction of fuel consumption for 56 over-the-road heavy heavy-duty trucks recruited in southern California. The method employed measurements exercised over chassis dynamometer cycles and the properties of those cycles. Nine driving cycle properties and their combinations were used to predict fuel consumption over an “unseen” cycle, based on measurements from up to four different baseline driving cycles. The results showed that the use of average velocity and average positive acceleration was suitable for the translation of fuel consumption between cycles, producing the lowest prediction error among the cases considered.
    International Journal of Sustainable Transportation 11/2012; 6(6):338-361.
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    ABSTRACT: Interest in cycling as a sustainable form of transport has helped foreground questions of gender and mobility. This paper reports on a qualitative study into Australian women's experiences of cycling through the life course. It focuses on the circumstances in which women start and stop cycling and the spatial contexts in which this occurs. The study found that, after childhood, almost half of the respondents had returned to cycling several times through the life course. Changes in women's cycling patterns related to changes in housing, employment, health and family status. The findings suggest productive new way of researching everyday mobility.
    International Journal of Sustainable Transportation 07/2012; 6(4):195-213.
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    ABSTRACT: Mobility management (MM) has been among Europe's prevailing approaches for promoting and achieving sustainable transportation in urban areas, with considerable work undertaken by researchers and practitioners in this area during the past two decades. However, development of MM policies and measures in European cities does not follow an organized and consistent approach for planning, designing, applying and evaluating a comprehensive MM-system. In that context, the objective of this paper is to propose a scheme, based on quality management (QM) principles, that would aid cities in systematically developing and deploying MM-plans and MM–measures and therefore in successfully supporting sustainability in their transportation system. The developed Quality Management Scheme for Mobility Management (QMSMM) is an integrated process of four major steps – components (policy setting, planning, implementing, monitoring and evaluating), structured in a feedback loop and supported by a set of quality criteria per step. The structure, components and elements of the QMSMM are presented in detail, along with supporting procedures for assessing a city's adaptation and compatibility with the scheme. Also, insights on a QMSMM demonstration to the MM-program of the city of Kortrijk, Belgium are offered.
    International Journal of Sustainable Transportation 07/2012; 6(4):238-256.
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    ABSTRACT: The Asia–Europe liner service often calls at a number of Europe-continent ports and one UK port. An alternative is to skip the UK port by using feeder services to reach the UK market. This article aims to quantitatively analyze the carbon dioxide (CO2) emissions of these two alternatives, and to identify which is preferable in different scenarios. We adopt a detailed service activity-based method to calculate the CO2 emissions for two alternatives in a range of scenarios. The study is expected to provide shipping companies with useful insight into policy merits and service route design from a CO2 emissions perspective.
    International Journal of Sustainable Transportation 07/2012; 6(4):214-237.
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    ABSTRACT: This article proposes a new road toll–design model for congested road networks with uncertain demand that can be used to create a sustainable urban transportation system. For policy assessment and strategic planning purposes, the proposed model extends traditional congestion pricing models to simultaneously consider congestion and environmental externalities due to vehicular use. Based on analyses of physical and environmental capacity constraints, the boundary conditions under which a road user on a link should pay either a congestion toll or an extra environmental tax are identified. The sustainable toll design model is formulated as a two-stage robust optimization problem. The first-stage problem before the realization of the future travel demand aims to minimize a risk-averse objective by determining the optimal toll. The second stage after the uncertain travel demand has been determined is a scenario-based route choice equilibrium formulation with physical and environmental capacity constraints. A heuristic algorithm that combines the sample average approximation approach and a sensitivity analysis-based method is developed to solve the proposed model. The upper and lower bounds of the model solution are also estimated. Two numerical examples are given to show the properties of the proposed model and solution algorithm and to investigate the effects of demand variation and the importance of including risk and environmental taxation in toll design formulations.
    International Journal of Sustainable Transportation 05/2012; 6(3):127-155.
  • International Journal of Sustainable Transportation 03/2012; 6(2):88-110.
  • International Journal of Sustainable Transportation 01/2012; 7(1):52-69.
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    ABSTRACT: This report develops a framework for a cross-country comparative assessment of transport sustainability in central and eastern European countries. The objective was to assess where national transportation systems stand relative to each other according to sustainability criteria. The core of the method is the evaluation of the current status and trends in transport performance using an Analytic Hierarchy Process approach. As a result, countries have been positioned in a static-dynamic space related to sustainability sub-themes. The significance of the approach is in its ability to monitor and analyze transport system functionality regarding sustainability concerns, thus raising awareness of these problems among policy makers.
    International Journal of Sustainable Transportation 11/2011; 5(6):319-344.
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    ABSTRACT: A statewide survey of bicycling behavior was conducted for the State of New Jersey. Our primary objective was to analyze factors associated with bicycling behavior. Most people who bicycle in the state do so for recreational purposes, thus our analysis provides information primarily on recreational bicycling. We find from our logit and ordered probit models that the propensity to bicycle and the frequency of bicycling are driven primarily by demographic and socioeconomic factors. We also analyze various place-based factors and find that in general most have no statistical effect. Exceptions include areas with higher population density and areas with parks and playgrounds, both being associated with more bicycling. Results provide useful information for planners seeking to provide facilities that may increase the level of recreational bicycling, which is known to improve public health.
    International Journal of Sustainable Transportation 09/2011; 5(5):251-269.
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    ABSTRACT: The Department for Transport (UK) has developed a program of social research to inform road pricing policy making, using both traditional and innovative research methods. The program addresses issues of public acceptability, the distributional impacts of road pricing policies, and behavioral responses to a complex pricing system. This paper discusses the methodological approaches used therein and sets out some emerging findings. The purpose is to review the use of this social research program and assess its potential for informing transport policy-making, an area where it has traditionally been under-utilized.
    International Journal of Sustainable Transportation 09/2010; 4(5):293-312.
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    ABSTRACT: This paper examines the methodological problem of analyzing changing personal travel behavior without available longitudinal intra-personal datasets. The findings of a trial retrospective survey conducted in Cape Town are discussed. In follow-up interviews, respondents did not report great uncertainty in their recollection of the amount of the time elapsed since changing behavior. The posited explanation is that the recalled behavior changes interrogated were associated with ‘life shocks.’ Consequently, the recollections of behavior changes—the details of which in themselves are unremarkable and would probably be forgotten quickly—are attached to salient events, and respondents therefore reported no major difficulty in recalling them in a retrospective survey.
    International Journal of Sustainable Transportation 09/2010; 4(5):253-271.