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Prof. Dr. Yusak Susilo
University of Natural Resources and Life Science, Vienna

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0 Transport Modelling
0 Urban Planning
0 travel behaviour
0 transport planning
0 Demand Modeling

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Journal article
Published: 10 March 2021 in Sustainable Cities and Society
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The sustainable and continuous development of public transport systems is crucial to ensuring robust and resilient transport and economic activity whilst improving the urban environment. Through technological improvement, cities can increase the competitiveness of public transport, promote equality and pursue a multi-modal shift to greener solutions. The introduction of vehicle automation technology into existing public transport systems has potential impacts on mobility behaviours and may replace conventional bus service in the future. This study examines travellers’ preferences for automated buses versus conventional buses, using a context-dependent stated choice experiment. This experiment measured the effects of context variables (such as trip purpose, travel distance, time of day, weather conditions and travel companion) on the choice of automated buses versus conventional buses. The results were analysed using mixed logit models, and the findings indicate that, in general, choice behaviours do not diverge much between the choice of automated bus and conventional bus. However, individuals’ choices are more elastic towards the changes in automated bus service levels compared to conventional bus service. The results show that poor weather conditions may lower the quality and reliability of public transport service, and the probability of choosing an automated bus over a conventional bus is reduced due to such disruptions. In addition, passengers travelling for work purposes, covering long distances, or travelling with companions are more likely to choose conventional buses than automated buses.

ACS Style

Jia Guo; Yusak Susilo; Constantinos Antoniou; Anna Pernestål. When and why do people choose automated buses over conventional buses? Results of a context-dependent stated choice experiment. Sustainable Cities and Society 2021, 69, 102842 .

AMA Style

Jia Guo, Yusak Susilo, Constantinos Antoniou, Anna Pernestål. When and why do people choose automated buses over conventional buses? Results of a context-dependent stated choice experiment. Sustainable Cities and Society. 2021; 69 ():102842.

Chicago/Turabian Style

Jia Guo; Yusak Susilo; Constantinos Antoniou; Anna Pernestål. 2021. "When and why do people choose automated buses over conventional buses? Results of a context-dependent stated choice experiment." Sustainable Cities and Society 69, no. : 102842.

Journal article
Published: 10 February 2021 in European Transport Research Review
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Introduction The first wave of COVID-19 pandemic period has drastically changed people’s lives all over the world. To cope with the disruption, digital solutions have become more popular. However, the ability to adopt digitalised alternatives is different across socio-economic and socio-demographic groups. Objective This study investigates how individuals have changed their activity-travel patterns and internet usage during the first wave of the COVID-19 pandemic period, and which of these changes may be kept. Methods An empirical data collection was deployed through online forms. 781 responses from different countries (Italy, Sweden, India and others) have been collected, and a series of multivariate analyses was carried out. Two linear regression models are presented, related to the change of travel activities and internet usage, before and during the pandemic period. Furthermore, a binary regression model is used to examine the likelihood of the respondents to adopt and keep their behaviours beyond the pandemic period. Results The results show that the possibility to change the behaviour matter. External restrictions and personal characteristics are the driving factors of the reduction in ones' daily trips. However, the estimation results do not show a strong correlation between the countries' restriction policy and the respondents' likelihood to adopt the new and online-based behaviours for any of the activities after the restriction period. Conclusion The acceptance and long-term adoption of the online alternatives for activities are correlated with the respondents' personality and socio-demographic group, highlighting the importance of promoting alternatives as a part of longer-term behavioural and lifestyle changes.

ACS Style

Elisa Bin; Claudia Andruetto; Yusak Susilo; Anna Pernestål. The trade-off behaviours between virtual and physical activities during the first wave of the COVID-19 pandemic period. European Transport Research Review 2021, 13, 1 -19.

AMA Style

Elisa Bin, Claudia Andruetto, Yusak Susilo, Anna Pernestål. The trade-off behaviours between virtual and physical activities during the first wave of the COVID-19 pandemic period. European Transport Research Review. 2021; 13 (1):1-19.

Chicago/Turabian Style

Elisa Bin; Claudia Andruetto; Yusak Susilo; Anna Pernestål. 2021. "The trade-off behaviours between virtual and physical activities during the first wave of the COVID-19 pandemic period." European Transport Research Review 13, no. 1: 1-19.

Journal article
Published: 10 November 2020 in Travel Behaviour and Society
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Successful implementation of a first-/last-mile automated bus (AB) service depends on consumers’ actual adoption of the service. Consumers, when decided to take an AB ride for the first time, shall rely on their expectation of the service and capabilities of the technology. After the first ride of the vehicle, their value assessments of the service are further refined based on their actual ride experiences. Whether the operators can retain the users highly depend on such assessment. Thus, it is immensely important, when investigating users’ adoption behaviour of a first-/last-mile AB service, we take into account the longitudinal changes of the users’ valuation of the service. This is the research gap that this study is contributing. During a first-/last-mile AB service trial in Stockholm, Sweden, a panel data involving 185 respondents was available for analysis. The first survey was shortly after the launch of the trialled AB service and the second one was four months later. Structural Equation Modelling was used to investigate the changes of users’ judging criteria across different socio-demographic groups, due to initial usage and the subsequent usage. The results show that the concerns affecting the users to continue with the service change with an increase in the ride experience. Willingness-to-use of the experienced users was initially affected by their level of appreciation with the safety and travel time with the service. However, ride comfort became a dominant factor with increasing ride experiences.

ACS Style

Pei Nen Esther Chee; Yusak O. Susilo; Yiik Diew Wong. Longitudinal interactions between experienced users’ service valuations and willingness-to-use a first-/last-mile automated bus service. Travel Behaviour and Society 2020, 22, 252 -261.

AMA Style

Pei Nen Esther Chee, Yusak O. Susilo, Yiik Diew Wong. Longitudinal interactions between experienced users’ service valuations and willingness-to-use a first-/last-mile automated bus service. Travel Behaviour and Society. 2020; 22 ():252-261.

Chicago/Turabian Style

Pei Nen Esther Chee; Yusak O. Susilo; Yiik Diew Wong. 2020. "Longitudinal interactions between experienced users’ service valuations and willingness-to-use a first-/last-mile automated bus service." Travel Behaviour and Society 22, no. : 252-261.

Journal article
Published: 23 October 2020 in Journal of Transport Geography
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A fair distribution of public transport benefits is a commonly stated goal of agencies and operators of public transport. However, it is less complicated and costly to provide accessibility in some parts of cities and their surroundings than in other parts. Densely populated areas, and areas situated closer to the city center therefore often have higher public transport accessibility than remote or sparsely populated areas. Neglecting these realities results with an unrealistic assessment of equity in service provision and hampers their consideration when setting policy goals. In this study, we propose a framework for investigating equity in the distribution of accessibility, where the suggested goal is to provide residents with equal accessibility for equally dense and central areas. For the Stockholm County, we show that accessibility may seem to be distributed horizontally inequitable and vertically regressive. However, once controlling for how dense and close to the city center residents live, while still being horizontally inequitable the distribution of accessibility in Stockholm County is found progressive, i.e., benefiting those with lower incomes. We demonstrate the proposed method for the case of skip-stop train operations and find that it shifts our constructed accessibility measure toward a more horizontally inequitable and vertically progressive state. We conclude that our proposed method can be a potent way for public transport agencies to measure and concretize equity goals and evaluate policy changes.

ACS Style

Isak Rubensson; Yusak Susilo; Oded Cats. Fair accessibility – Operationalizing the distributional effects of policy interventions. Journal of Transport Geography 2020, 89, 102890 .

AMA Style

Isak Rubensson, Yusak Susilo, Oded Cats. Fair accessibility – Operationalizing the distributional effects of policy interventions. Journal of Transport Geography. 2020; 89 ():102890.

Chicago/Turabian Style

Isak Rubensson; Yusak Susilo; Oded Cats. 2020. "Fair accessibility – Operationalizing the distributional effects of policy interventions." Journal of Transport Geography 89, no. : 102890.

Journal article
Published: 29 August 2020 in Sustainability
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Corporate Mobility as a Service (CMaaS) is a type of MaaS that enables mobility within as well as to and from a worksite for employees. The expected benefits of CMaaS are to support a shift towards more sustainable and more effective work-related transport activities. There is a lack of knowledge regarding the impacts of CMaaS and how its performance should be measured. This paper proposes an evaluation framework to measure CMaaS impacts at a system level. The proposed evaluation framework is then applied to evaluate a real CMaaS deployment in Sweden. This paper contributes to knowledge building and guidance to support policy and decision making for CMaaS development and implementation in the future.

ACS Style

Bhavana Vaddadi; Xiaoyun Zhao; Yusak Susilo; Anna Pernestål. Measuring System-Level Impacts of Corporate Mobility as a Service (CMaaS) Based on Empirical Evidence. Sustainability 2020, 12, 7051 .

AMA Style

Bhavana Vaddadi, Xiaoyun Zhao, Yusak Susilo, Anna Pernestål. Measuring System-Level Impacts of Corporate Mobility as a Service (CMaaS) Based on Empirical Evidence. Sustainability. 2020; 12 (17):7051.

Chicago/Turabian Style

Bhavana Vaddadi; Xiaoyun Zhao; Yusak Susilo; Anna Pernestål. 2020. "Measuring System-Level Impacts of Corporate Mobility as a Service (CMaaS) Based on Empirical Evidence." Sustainability 12, no. 17: 7051.

Journal article
Published: 11 August 2020 in Sustainability
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The rapid development of automated buses holds great potential for the development of transportation systems. As research into innovative forms of automated transportation systems gains momentum, it is important to understand the public’s perceptions of such public transport systems. Previous studies have contributed based on hypothetical scenarios, but not based on real observations. Based on an online survey in Stockholm in March 2019, the current research addresses this gap by investigating the public’s perceptions from a real, fully operational, automated public transportation service operated in a mixed traffic environment on public roads. The respondents were selected along the automated bus line in Barkabystaden, Stockholm. Our findings indicate that (1) The presence of onboard operators has a positive impact on respondents’ perceived safety, (2) People who have not taken automated buses before have a more negative perception of driving speed of the bus service than people who have taken the buses before, (3) Attitudinal factors, such as public perceptions of safety, driving speed, reliability, and convenience, have a significant influence on the acceptance of the new bus system, (4) As an emerging and innovative transportation mode, automated buses are expected to attract a high share of regular public transportation mode users and the younger generations in the future, (5) Social-demographic characteristics such as gender and income had no significant impacts on the adoption of the new technology. The results provide the characteristics of early bus adopters and their travel behavior and help to prioritize possible investments and allow the policymakers and private industries to identify the special needs of users.

ACS Style

Jia Guo; Yusak Susilo; Constantinos Antoniou; Anna Pernestål Brenden. Influence of Individual Perceptions on the Decision to Adopt Automated Bus Services. Sustainability 2020, 12, 6484 .

AMA Style

Jia Guo, Yusak Susilo, Constantinos Antoniou, Anna Pernestål Brenden. Influence of Individual Perceptions on the Decision to Adopt Automated Bus Services. Sustainability. 2020; 12 (16):6484.

Chicago/Turabian Style

Jia Guo; Yusak Susilo; Constantinos Antoniou; Anna Pernestål Brenden. 2020. "Influence of Individual Perceptions on the Decision to Adopt Automated Bus Services." Sustainability 12, no. 16: 6484.

Journal article
Published: 05 August 2020 in Transportation Research Part A: Policy and Practice
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The successful adoption of a product or service by its target market or users relies on delivering a product or service in line with their needs and expectations. Failure to do so will likely result in a low rate of uptake or use of the product or service. This study sought to identify the criteria by which potential users of a first-/last-mile automated bus (AB) service would evaluate the service, and accordingly decide whether to use or disregard the service. This research investigated various explanatory factors affecting users’ perceptions of the service’s quality and utility, and which enhanced or diminished their intentions to use it. The data analysed in this study was collected from a survey conducted in February and March of 2018 in Stockholm, Sweden, during a trial operation of a first-/last-mile AB service. Three-factor theory analysis, commonly used to analyse services, was applied to this data in order to identify users’ core perceptions about the service, which in turn influence their intention-to-use the service. Structural equation modelling was used to identify the significant factors that influence the identified perceptions influencing the intention-to-use the service. This study found that different subgroups of users prioritised different attributes. Prospective users (with no prior experience with the service) were most concerned with the frequency of service. Their intention-to-use the service greatly increased when the service frequency is comparable to the service frequency of a regular public bus service. Experienced users’ intentions to continue using the service greatly increased when the buses were made more comfortable. This study additionally found that users’ perceptions of the service’s quality were also influenced by numerous factors including the passenger’s age, income level, preferred mode of travel for daily trips, preferred mode of travel for first-/last-mile trips, being tech-savvy or not, and their level of familiarity with automated driving technology.

ACS Style

Pei Nen Esther Chee; Yusak O. Susilo; Yiik Diew Wong. Determinants of intention-to-use first-/last-mile automated bus service. Transportation Research Part A: Policy and Practice 2020, 139, 350 -375.

AMA Style

Pei Nen Esther Chee, Yusak O. Susilo, Yiik Diew Wong. Determinants of intention-to-use first-/last-mile automated bus service. Transportation Research Part A: Policy and Practice. 2020; 139 ():350-375.

Chicago/Turabian Style

Pei Nen Esther Chee; Yusak O. Susilo; Yiik Diew Wong. 2020. "Determinants of intention-to-use first-/last-mile automated bus service." Transportation Research Part A: Policy and Practice 139, no. : 350-375.

Journal article
Published: 02 June 2020 in Travel Behaviour and Society
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Using a modified three-level modelling method and a multidimensional three-week household time-use and activity diary, this study investigates the interaction of the time duration of individuals’ activities, travel parameters, the built environment and socio-demographics on people’s transport-related social inclusion. Such interactions are assumed to affect one’s social and mental health on a daily basis, in particular in developing countries where working conditions, time pressures and income and accessibility gaps are much more extreme than in developed countries. The results show that, in developing countries such as Indonesia, even though people believe that they are well integrated within society, have adequate access to various public amenities, have abundant opportunities for varied social participation and more access to various public amenities, many still have mental health problems due to the existence of physical health problems, chronic diseases, the feeling of insecurity resulting from financial burdens and a lack of social security. Having more inclusive transport access, on the other hand, helps people to have better social health. The life stages of individuals, particularly for those who belong to the later stage, correlates with the probability of having mental and social health problems intensified by a worsened financial status and one’s need to work for a longer time. Having more predictable activity–travel patterns and an opportunity for a break from regular work activities during the weekend positively correlates with older people's transport-related social inclusion and positive mental health conditions. More cycling and walking, and the provision of denser public amenities, can contribute to more inclusive transport access and subsequently to one’s social and mental health. Moreover, providing a dedicated public transport system for people who reside in Greater Bandung Metropolitan Area is expected to be associated with better transport-related social inclusion and social health.

ACS Style

Dimas B.E. Dharmowijoyo; Yusak O. Susilo; Ibnu Syabri. Time use and spatial influence on transport-related social exclusion, and mental and social health. Travel Behaviour and Society 2020, 21, 24 -36.

AMA Style

Dimas B.E. Dharmowijoyo, Yusak O. Susilo, Ibnu Syabri. Time use and spatial influence on transport-related social exclusion, and mental and social health. Travel Behaviour and Society. 2020; 21 ():24-36.

Chicago/Turabian Style

Dimas B.E. Dharmowijoyo; Yusak O. Susilo; Ibnu Syabri. 2020. "Time use and spatial influence on transport-related social exclusion, and mental and social health." Travel Behaviour and Society 21, no. : 24-36.

Journal article
Published: 07 April 2020 in European Transport Research Review
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Introduction Travel demand and travel satisfaction of a transport service are affected by user perceptions of the service quality attributes, and such perceptions should be included in studying user willingness-to-pay (WTP) for automated vehicle (AV) services. This study applied structural equation modelling with service quality attribute perceptions as latent variables affecting WTP. Objectives We investigated how WTP AV services are affected by socio-demographic characteristics, knowledge and experiences with AV, existing travel modes and particularly, perceptions of the associated service quality attributes. The AV services are: 1) on-demand personalised AV (PAV) service, 2) demand responsive shared AV (SAV) service, and 3) first−/last-mile automated bus (AB) service. Methods The data were collected from 584 potential users of a first−/last-mile AB service trial operated in Kista, Stockholm. Results Results show people hold different expectations towards each type of AV service. These expectations act as the minimum requirements for people to pay for the AV services. Respondents are found to be willing to pay more for PAV service if it is safe, provides good ride comfort, and is competitively priced relative to the price travelling by metro and train over a same distance. Other than service quality attribute perceptions, income level, existing travel modes for daily trips, familiarity with automated driving technology and AB ride experience are important factors affecting WTP for the AV services. Conclusion The developed model can be applied to understand expectations of potential users towards a new AV service, and to identify user groups who are willing to pay the service. New AV services can thus be designed sensibly according to users’ actual needs.

ACS Style

Pei Nen Esther Chee; Yusak Octavius Susilo; Yiik Diew Wong; Anna Pernestål. Which factors affect willingness-to-pay for automated vehicle services? Evidence from public road deployment in Stockholm, Sweden. European Transport Research Review 2020, 12, 1 -17.

AMA Style

Pei Nen Esther Chee, Yusak Octavius Susilo, Yiik Diew Wong, Anna Pernestål. Which factors affect willingness-to-pay for automated vehicle services? Evidence from public road deployment in Stockholm, Sweden. European Transport Research Review. 2020; 12 (1):1-17.

Chicago/Turabian Style

Pei Nen Esther Chee; Yusak Octavius Susilo; Yiik Diew Wong; Anna Pernestål. 2020. "Which factors affect willingness-to-pay for automated vehicle services? Evidence from public road deployment in Stockholm, Sweden." European Transport Research Review 12, no. 1: 1-17.

Utsg special issue
Published: 01 April 2020 in Transportation Planning and Technology
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The need for improved public transport (PT) ticketing in ever-growing deregulated PT markets has made well-designed integrated ticketing systems a priority area of intervention for PT service providers around the world. Yet, very little practical evidence of its impacts are reported in Sweden and in the world at large. The focus of this study was the impacts of the Movingo integrated ticketing scheme in terms of PT patronage, user satisfaction and the perceived quality of the ticketing set-up. Three travel surveys were conducted along the Stockholm-Uppsala route. Methods including logistic regression and correlated t-tests were used to analyse the samples. The findings suggest that the scheme made rail commuting more attractive resulting in an overall increase of about 24% in ticket sales with 3% – 15% car commuters reporting that they patronised PT services after the project. The scheme also resulted in increased rail commuter satisfaction. The overall perceived quality of the ticketing set-up did not however improve due to interoperability challenges. Service providers’ uncertainty about equitable distribution of revenue among the participating service providers, interoperability challenges and the lack of interest among most of the participating service providers to sell Movingo tickets are some issues to be addressed.

ACS Style

Ilyas B. Alhassan; B. Matthews; Jeremy P. Toner; Yusak Octavius Susilo. The Movingo integrated ticket: seamless connections across the mälardalen region of Sweden. Transportation Planning and Technology 2020, 43, 404 -423.

AMA Style

Ilyas B. Alhassan, B. Matthews, Jeremy P. Toner, Yusak Octavius Susilo. The Movingo integrated ticket: seamless connections across the mälardalen region of Sweden. Transportation Planning and Technology. 2020; 43 (4):404-423.

Chicago/Turabian Style

Ilyas B. Alhassan; B. Matthews; Jeremy P. Toner; Yusak Octavius Susilo. 2020. "The Movingo integrated ticket: seamless connections across the mälardalen region of Sweden." Transportation Planning and Technology 43, no. 4: 404-423.

Journal article
Published: 26 March 2020 in Transport Policy
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When Public Transport Administrations propose changes in fare schemes or increased fares, they are often met with concerns regarding the proposed fare schemes fairness. Implicit in these concerns is an understanding of relations governing land use and public transport, impacting equity. In this paper, we use socio-economic statistics of census areas in conjunction with public transport travel data from a transport forecast model to assess the geographical and distributional fairness of alternative fare schemes: flat, zone-based and distance-based. We discuss our result in relation to both the scientific literature and the known “truths” in the public debate. The method is applied to the Case study of Stockholm public transport. We find that high-income travelers benefit from all three fare schemes considered but, in contrast to much of the literature, least by flat fares. A strong distance-dependent fare could be horizontally equitable but has poor vertical equity.

ACS Style

Isak Rubensson; Yusak Susilo; Oded Cats. Is flat fare fair? Equity impact of fare scheme change. Transport Policy 2020, 91, 48 -58.

AMA Style

Isak Rubensson, Yusak Susilo, Oded Cats. Is flat fare fair? Equity impact of fare scheme change. Transport Policy. 2020; 91 ():48-58.

Chicago/Turabian Style

Isak Rubensson; Yusak Susilo; Oded Cats. 2020. "Is flat fare fair? Equity impact of fare scheme change." Transport Policy 91, no. : 48-58.

Editorial
Published: 01 March 2020 in Journal of Transport & Health
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ACS Style

Charles Musselwhite; Erel Avineri; Yusak Susilo. Editorial JTH 16 –The Coronavirus Disease COVID-19 and implications for transport and health. Journal of Transport & Health 2020, 16, 100853 -100853.

AMA Style

Charles Musselwhite, Erel Avineri, Yusak Susilo. Editorial JTH 16 –The Coronavirus Disease COVID-19 and implications for transport and health. Journal of Transport & Health. 2020; 16 ():100853-100853.

Chicago/Turabian Style

Charles Musselwhite; Erel Avineri; Yusak Susilo. 2020. "Editorial JTH 16 –The Coronavirus Disease COVID-19 and implications for transport and health." Journal of Transport & Health 16, no. : 100853-100853.

Articles
Published: 02 January 2020 in Transportmetrica B: Transport Dynamics
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Weather is fundamentally a perception rather than an objective measure. This study uses data from a four-wave travel diary survey and aims to answer two research questions, i.e. 1. How individuals from different socio-demographic groups perceive weather. 2. How an individual’s weather perception affects his/her leisure activity participation decision. A thermal indicator, Universal Thermal Climate Index (UTCI) is used as a synthetic index that represents the thermal environment. Panel static/dynamic ordered Probit model is used to model leisure activity participation. The results show that the reference thermal environment, in general, corresponds to the historical mean of the thermal environment. Moreover, the effect of subjective weather perception on leisure activity participation is non-linear and asymmetric. Only ‘very disappointed weather’ and ‘very satisfied weather’ significantly influence leisure activity participation. The intra-individual heterogeneity in the effect of ‘very good weather’ has a smaller magnitude than that of ‘very bad weather’.

ACS Style

Chengxi Liu; Yusak Octavius Susilo; Nursitihazlin Ahmad Termida. Weather perception and its impact on out-of-home leisure activity participation decisions. Transportmetrica B: Transport Dynamics 2020, 8, 219 -236.

AMA Style

Chengxi Liu, Yusak Octavius Susilo, Nursitihazlin Ahmad Termida. Weather perception and its impact on out-of-home leisure activity participation decisions. Transportmetrica B: Transport Dynamics. 2020; 8 (1):219-236.

Chicago/Turabian Style

Chengxi Liu; Yusak Octavius Susilo; Nursitihazlin Ahmad Termida. 2020. "Weather perception and its impact on out-of-home leisure activity participation decisions." Transportmetrica B: Transport Dynamics 8, no. 1: 219-236.

Book chapter
Published: 01 November 2019 in Mapping the Travel Behavior Genome
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This chapter focuses on the six typical shared activities, i.e. grocery shopping, household chores, babysitting, picking up children, relaxing, and social activities, and investigates on how a husband/wife's time allocation on such activities is influenced by his/her spouse's participation on the same activities and vice versa. The results show that the altruism behaviors differ substantially across different activity types. Income and the presence of children polarize husband's altruism behaviors, and wives have a lot of power in influencing husbands' time use allocations for activities such as baby-sitting. At the same time, the results also show the significant role of opportunities, such as accessibilities to wider crowd and amenities, in shaping household members' altruism behaviors.

ACS Style

Yusak Octavius Susilo; Chengxi Liu. Who has more say on your daily time use? A quantitative intra-household time-use altruism analysis. Mapping the Travel Behavior Genome 2019, 455 -477.

AMA Style

Yusak Octavius Susilo, Chengxi Liu. Who has more say on your daily time use? A quantitative intra-household time-use altruism analysis. Mapping the Travel Behavior Genome. 2019; ():455-477.

Chicago/Turabian Style

Yusak Octavius Susilo; Chengxi Liu. 2019. "Who has more say on your daily time use? A quantitative intra-household time-use altruism analysis." Mapping the Travel Behavior Genome , no. : 455-477.

Journal article
Published: 25 September 2019 in Transportation Research Part F: Traffic Psychology and Behaviour
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Classifying public transport service attributes based on their influence on overall traveler satisfaction can assist stakeholders and practitioners in introducing cost-efficient measures. To date most studies employed methods that were based on the assumption that the impact of service attributes on traveler satisfaction is entirely linear and symmetric. This study examines whether service attributes have a non-linear and asymmetric influence on the overall travel experience by employing the Three-factor theory (basic, performance and exciting factors). The analysis is conducted for different traveler segments depending on their level of captivity, travel frequency by public transport and travel mode used, and is based on a relatively large sample size collected for Stockholm County. Moreover, the estimated models control for important socio-demographic and travel characteristics that have been insofar overlooked. Results are presented in the form of a series of multi-level cubes that represent different essentiality of traveler needs which provide a useful methodological framework to further design quality service improvements that can be applied to various geographical contexts. Our findings highlight that a “one size fits all” approach is not adequate for identifying the needs of distinct traveler segments and of travelers using different travel modes. Furthermore, two-thirds of the attributes are consistently classified into the same factor category which entails important policy implications. This research deepens and expands the very limited knowledge of the application of the three-factor theory in the transport field.

ACS Style

Roberto F. Abenoza; Oded Cats; Yusak O. Susilo. Determinants of traveler satisfaction: Evidence for non-linear and asymmetric effects. Transportation Research Part F: Traffic Psychology and Behaviour 2019, 66, 339 -356.

AMA Style

Roberto F. Abenoza, Oded Cats, Yusak O. Susilo. Determinants of traveler satisfaction: Evidence for non-linear and asymmetric effects. Transportation Research Part F: Traffic Psychology and Behaviour. 2019; 66 ():339-356.

Chicago/Turabian Style

Roberto F. Abenoza; Oded Cats; Yusak O. Susilo. 2019. "Determinants of traveler satisfaction: Evidence for non-linear and asymmetric effects." Transportation Research Part F: Traffic Psychology and Behaviour 66, no. : 339-356.

Journal article
Published: 23 February 2019 in Transportation Research Part A: Policy and Practice
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Weather characteristics have a significant impact on the travel experience. Good accessibility and proximity to metro positively influence overall satisfaction. Rather weak effect of built-environment characteristics on the travel experience. Most of the examined variables impact similarly in urban and peri-urban contexts.

ACS Style

Roberto F. Abenoza; Chengxi Liu; Oded Cats; Yusak O. Susilo. What is the role of weather, built-environment and accessibility geographical characteristics in influencing travelers’ experience? Transportation Research Part A: Policy and Practice 2019, 122, 34 -50.

AMA Style

Roberto F. Abenoza, Chengxi Liu, Oded Cats, Yusak O. Susilo. What is the role of weather, built-environment and accessibility geographical characteristics in influencing travelers’ experience? Transportation Research Part A: Policy and Practice. 2019; 122 ():34-50.

Chicago/Turabian Style

Roberto F. Abenoza; Chengxi Liu; Oded Cats; Yusak O. Susilo. 2019. "What is the role of weather, built-environment and accessibility geographical characteristics in influencing travelers’ experience?" Transportation Research Part A: Policy and Practice 122, no. : 34-50.

Journal article
Published: 14 February 2019 in Research in Transportation Economics
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This case study describes the project Elbilslandet (The Electric Vehicle Country) in Gotland, Sweden, where the island Gotland is made “ready for electric vehicles” by providing a network of charging infrastructure and electric vehicle rental during several summer seasons. The influence of the electric vehicle (EV) rental scheme on the process towards electric vehicle adoption is investigated using the Protection Motivation Theory (PMT) and the Transtheoretical Model of Change (TTM). Moreover, the travel patterns of electric rental cars are compared with those of conventional rental cars. The main results of this study are the following: Firstly, people renting an EV are on average closer to electric vehicle adoption than people renting a conventional vehicle. Secondly, people who rent an EV are at the time of rental associated with more positive attitudes towards EVs, have more knowledge about EVs and would feel more secure driving an EV. Thirdly, EV-rental does not seem to have a large additional effect on the stage-of-change towards EV-adoption of the participants. Lastly, the driving patterns of EVs do not seem to indicate serious limitations regarding driving distance, parking time and the destinations that have been visited, as compared to the driving patterns of conventional rental cars.

ACS Style

Joram H.M. Langbroek; Matej Cebecauer; Jon Malmsten; Joel P. Franklin; Yusak O. Susilo; Peter Georén. Electric vehicle rental and electric vehicle adoption. Research in Transportation Economics 2019, 73, 72 -82.

AMA Style

Joram H.M. Langbroek, Matej Cebecauer, Jon Malmsten, Joel P. Franklin, Yusak O. Susilo, Peter Georén. Electric vehicle rental and electric vehicle adoption. Research in Transportation Economics. 2019; 73 ():72-82.

Chicago/Turabian Style

Joram H.M. Langbroek; Matej Cebecauer; Jon Malmsten; Joel P. Franklin; Yusak O. Susilo; Peter Georén. 2019. "Electric vehicle rental and electric vehicle adoption." Research in Transportation Economics 73, no. : 72-82.

Journal article
Published: 01 January 2019 in Transportation Research Part E: Logistics and Transportation Review
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ACS Style

Chengxi Liu; Qian Wang; Yusak Octavius Susilo. Assessing the impacts of collection-delivery points to individual’s activity-travel patterns: A greener last mile alternative? Transportation Research Part E: Logistics and Transportation Review 2019, 121, 84 -99.

AMA Style

Chengxi Liu, Qian Wang, Yusak Octavius Susilo. Assessing the impacts of collection-delivery points to individual’s activity-travel patterns: A greener last mile alternative? Transportation Research Part E: Logistics and Transportation Review. 2019; 121 ():84-99.

Chicago/Turabian Style

Chengxi Liu; Qian Wang; Yusak Octavius Susilo. 2019. "Assessing the impacts of collection-delivery points to individual’s activity-travel patterns: A greener last mile alternative?" Transportation Research Part E: Logistics and Transportation Review 121, no. : 84-99.

Journal article
Published: 31 October 2018 in Journal of Transport Geography
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The activity space of an individual is defined as the activity-travel environment which a traveller is using for his or her activities (Axhausen et al., 2002). It is limited by this individual's ability and resources, such as available time for travel as well as his or her anchor points. However, most existing studies have focused on single individual activity space, ignoring the fact that individuals' activities often interact with that of his or her family members'. In this paper a multivariate model is proposed where the correlation between travel time of fathers and mothers, and the correlation between the activity space and travel time are modelled explicitly. The estimated correlations from these joint distributions provide insights into both the intra-household interactions in daily travel and the intrinsic relationships of the hidden limits in the dimensions of space and time. The travel time limits are modelled using a stochastic frontier model component, which can estimate an unobserved upper or lower limit for travel time expenditure. This limit usually refers to the maximum travel time budget or minimum travel time need, which denotes the maximum or minimum amount of travel time that an individual is willing or able to allocate per day. The concept of the confidence ellipse is used as a measure of activity space constructed from the multi-day travel diary data. It is hypothesised that the unobserved travel time limits and activity space sizes of fathers and mothers are correlated with each other, due to a similar spatial knowledge and accessibility to various facilities. The daily variations in the travel time expenditure of parents are also assumed to be correlated because of daily household task allocation and joint household travel. Data collected from a three-week household travel diary in the Bandung Metropolitan Area in Indonesia are used for estimation in this study. The estimated frontier model component shows that neither parent has reached their maximum travel time budget and/or minimum travel time need that they inherently must spend. Compared with other attributes, the perceived accessibility attributes play the most important role in influencing the activity space limits. For households with fully employed fathers, a trade-off mechanism is found in travel time expenditure between parents, which is likely due to the redistribution of household tasks. On the other hand, for households with fathers who are not fully employed, a complementary effect is found, arising from the joint travel among household members. The travel time budget and activity space limits of fathers are positively correlated with those of mothers. These findings call for the formulation of transport policies that consider the household as a unit, especially in developing countries such as Indonesia, to fulfil the mobility needs of different market segments, e.g., households with fully employed fathers and those with fathers who are not fully employed.

ACS Style

Chengxi Liu; Yusak O. Susilo; Dimas B.E. Dharmowijoyo. Investigating intra-household interactions between individuals' time and space constraints. Journal of Transport Geography 2018, 73, 108 -119.

AMA Style

Chengxi Liu, Yusak O. Susilo, Dimas B.E. Dharmowijoyo. Investigating intra-household interactions between individuals' time and space constraints. Journal of Transport Geography. 2018; 73 ():108-119.

Chicago/Turabian Style

Chengxi Liu; Yusak O. Susilo; Dimas B.E. Dharmowijoyo. 2018. "Investigating intra-household interactions between individuals' time and space constraints." Journal of Transport Geography 73, no. : 108-119.

Journal article
Published: 30 October 2018 in Transportation Research Procedia
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The amount of useful information that can be extracted from travel diaries is matched by the difficulty of obtaining travel diaries in a modern era where the response rate to traditional travel diary collection methods has seen a decrease in most countries. Prompted by this, a body of research has been dedicated to study how travel diaries can be collected via new methods, namely location enabled devices such as smartphones, that have a higher penetration rate (in terms of device ownerships and user attachment) and are both easier and cheaper to manage compared to traditional data collection method, e.g. paper-and-pencil, phone, or web-based questionnaires. This paper offers an overview of the current state of travel diary collection, a potential future state and a practical checklist for travel diary collection case studies. A thorough discussion on different pros and cons of travel diary collection methods and efforts needed for the convergence of methods to collect travel diaries for all demographics are provided. The practical checklist to aid researchers to organise case studies is based on the authors’ experience and it is meant to raise awareness of difficulties that can be encountered while collecting travel surveys with automated and semi-automated systems, and how to overcome them.

ACS Style

Adrian C. Prelipcean; Yusak O. Susilo; Gyözö Gidófalvi. Collecting travel diaries: Current state of the art, best practices, and future research directions. Transportation Research Procedia 2018, 32, 155 -166.

AMA Style

Adrian C. Prelipcean, Yusak O. Susilo, Gyözö Gidófalvi. Collecting travel diaries: Current state of the art, best practices, and future research directions. Transportation Research Procedia. 2018; 32 ():155-166.

Chicago/Turabian Style

Adrian C. Prelipcean; Yusak O. Susilo; Gyözö Gidófalvi. 2018. "Collecting travel diaries: Current state of the art, best practices, and future research directions." Transportation Research Procedia 32, no. : 155-166.