Authorship：Corresponding author   Language：English   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Eastern Asia Society for Transportation Studies  

<p>Currently, Microlet is the main public transportation in Dili, Timor-Leste, and faces critical issues such as poor-quality services and dissatisfaction among passengers. Introducing a new high-quality bus service appears to be a vital solution to address the problems and also to create a high-quality urban transportation system. To understand the current service quality of Microlet and investigate the effect of new, high-quality bus service on the mode choice behavior of passengers, a household interview survey was conducted to obtain the revealed (RP) and stated preference (SP). The combined RP/SP discrete choice models were estimated for travel mode choice. The results indicated that people have a high intention to use a new high-quality bus service. However, it was observed that the intention decreases from 90% to around 30% when the fare increases from 0.25 USD to 1 USD.</p>

DOI： 10.11175/easts.16.pp3863

CiNii Research

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.trf.2025.04.021

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

<p>Subjective evaluation of individuals is crucial for adopting new mobility services. This study aims to understand the acceptability of two newly emerged personal e-mobility services—shared e-motorcycle and e-scooter services―and the subjective evaluations underlying their acceptability. A questionnaire survey was administered across Japan in December 2023 to understand the factors underlying acceptability. The survey included questions about the acceptance of shared e-motorcycles and e-scooters and questions related to measuring subjective factors, trust, perceived usability, positive and negative perceptions, and positive and negative affect. An ordered probit model was used to identify factors influencing acceptability. The results showed that subjective factors, such as experience with similar existing services, trust in the new mobility service, perceived usability, system usability scale, and positive and negative perceptions of the new mobility service, significantly affected an individual’s acceptability. For instance, an individual’s experience with bicycle sharing increases their intention to use e-motorcycles and share scooters. In addition, individuals who trust mobility and sharing services are more likely to use shared personal e-mobility services. The use of shared e-motorcycles and e-scooters was significantly driven by perceived usability—related to easy access to shared mobility. Finally, positive perceptions of personal e-mobility sharing significantly increased acceptability, whereas negative perceptions had the opposite effect.</p>

DOI： 10.2208/journalofjsce.24-20037

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CiNii Research

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.trpro.2024.12.161

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.aap.2024.107833

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Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：Society for Traffic Sciences  

DOI： 10.34398/kokaken.55.3_7

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CiNii Research

Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

<p>With the quiescence of COVID-19, it is time for both companies and workers to reconsider the frame-work of telework. In this study, we analyzed the impact of telework on workers, focusing on subjective well-being (SWB), using questionnaire survey data. The estimation results using structural equation modeling revealed that telework does not directly affect SWB. However, it was shown to indirectly influence SWB through factors such as work-related stress, job enthusiasm, work-life balance, and satisfaction with travel scale. Furthermore, working from satellite offices was found to have a positive impact on job enthusiasm, while wanting but being unable to work from home negatively affected job enthusiasm. This study demonstrates the complex mechanisms through which teleworking indirectly affects SWB, providing important insights for the formulation of telework-related policies.</p>

DOI： 10.2208/jscejj.24-20131

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CiNii Research

Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：Japan Society of Civil Engineers  

<p>This study analyzed contributing variables affecting driver’s injury severity level, distinguished by the degree of negligence, in the crash of 4-wheeled vehicles at intersections in Aichi prefecture. To investigate the heterogeneity of thresholds, a hierarchical ordered probit model was constructed using the crash data from 2016 to 2020 combined with other data, such as the regional characteristics data and road-specific data. The estimation results showed that ages of the other party, vehicle size differences, collision directions, dim night conditions and land use significantly affected the injury severity level. In addition, the significant variables at the thresholds revealed the factors that partially influence the injury severity level, such as the age of the party, weather and time of day.</p>

DOI： 10.2208/jscejj.24-20019

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CiNii Research

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.trf.2024.06.009

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.trf.2024.05.019

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Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Eastern Asia Society for Transportation Studies  

<p>The COVID-19 pandemic has accelerated changes in work styles, particularly leading to an increase in teleworking. This increase has the potential to affect transportation and urban development. In Japan, as telework is gaining popularity with more companies implementing telework systems, the choice of workplaces has become diverse. This study investigates factors influencing workers’ time allocation among different workplaces, such as offices, satellite offices, and homes. A time allocation model is applied to the data collected by the web-based survey, which includes social demographics, evaluation of the work environment, and psychological factors related to work-life balance. The estimation results indicate that socio-demographic attributes, job type, work characteristics, work efficiency, work-life interruption, recreation intention, and work environment satisfaction significantly affect the time allocation among different workplaces.</p>

DOI： 10.11175/easts.15.179

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CiNii Research

Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/su16103994

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.eastsj.2024.100141

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1109/TITS.2023.3310213

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (international conference proceedings)  

DOI： 10.1109/ITSC57777.2023.10421864

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Language：English   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：The City Planning Institute of Japan  

<p>The COVID-19 pandemic and the resultant preventive measures worldwide have accelerated a change in the way millions of people work. Telework became necessary to prevent the spread of coronavirus and reduce office workers’ health risk. The change in employees’ workstyle may directly impact commuters’ travel behavior, which affects individuals’ residential area choices and companies’ office location choices, ultimately affecting urban development and transportation infrastructures. This research aims to investigate preferences for telework among Japanese employees and, in hybrid workstyles, identify the factors that affect the best trade-off between commuting-based work and telework. A web-based questionnaire collected data which was analyzed using ordered probit modeling. Results revealed that 25% of non-telecommuters want to switch to telework and that the number of workers who want 100% telework increased from 4.9% to 8%. Regression analysis showed a strong influence of socioeconomic and demographic characteristics on the choice between commuting and ICT-based work. Results of this study make it possible to understand office workers’ intentions to work remotely and predict how this will affect economic activity distribution within urban areas. It is also possible to consider an actual case of the implementation of ICT infrastructure for specific segments of society.</p>

DOI： 10.14398/urpr.10.179

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CiNii Research

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：SAGE Publications  

The serviceability of a road network often faces challenges of traffic congestion and natural disasters which can damage the performance of many links within the network. To ensure the high performance of a road network, it is essential to identify and protect the critical links which if disrupted will cause substantial damage to the network. This study analyzes the vulnerability of the road network of the city of Casablanca in Morocco. Capacity weighted spectral analysis of the graph Laplacian is used to evaluate the road network vulnerability and identify potential critical links. We consider two cases concerning the weight definition: capacity weighted without considering travel demand and reserve capacity weighted with consideration of travel demand. After finding the critical links of the network, we investigate its vulnerability with consideration of a future tramway project. We compare two cases: the road network with the current tramway lines and that including two additional tramway lines planned for the future. The results show shifts in the critical links between the two cases. Furthermore, an increase in vulnerability is observed after the construction of the new tramway lines if no measures are taken to maintain the corresponding link capacities.

DOI： 10.1177/03611981221110565

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Other Link： http://journals.sagepub.com/doi/full-xml/10.1177/03611981221110565

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1177/03611981221143378

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Language：English   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (scientific journal)   Publisher：Eastern Asia Society for Transportation Studies  

<p>Before the final advent of Robo-taxi, careful preparations for integrating the Robo-taxi into society and understanding how travelers value the Robo-taxi against other travel modes are indispensable. To this end, a stated preference (SP) survey was conducted to understand people’s travel mode choice behavior for commuting, shopping, and hospital visiting. Besides, a reveal preference (RP) survey was supplemented to improve the robustness of parameter estimation. We investigated the effect of the socio-demographic, travel attribute, Robo-taxi feature, and latent variables on the mode choice behavior for the three typical travel purposes by the hybrid choice model. The results showed that old people prefer using Robo-taxi for commuting and hospital visiting, while not for shopping; the high ride-sharing rate of Robo-taxi will impede the willingness to use for shopping; reliability, perception of personal benefit as well as social benefit exert positive effect on Robo-taxi usage across all purposes.</p>

DOI： 10.11175/easts.14.1019

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CiNii Research

Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.eastsj.2022.100063

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1080/15472450.2022.2086805

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier Ltd  

DOI： 10.1016/j.tra.2021.10.004

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：University of Minnesota  

DOI： 10.5198/jtlu.2021.1763

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Language：English   Publishing type：Research paper (conference, symposium, etc.)   Publisher：The City Planning Institute of Japan  

In this study, the risk factors of bicycle accidents at intersections are analyzed, considering intersections geometric features and bicycle road in the central business district area of Nagoya-city, Japan, between the years 2006 and 2015. From the basic descriptive statistics, bicycle accidents frequently occurred at intersections: 79% in Nagoya and 77% in the study area. To evaluate bicycle road effects, the data was divided into three time periods, before and after the bicycle roads were introduced in 2008 and 2011. The negative binomial count model is used to identify the significant explanatory variables on bicycle accident occurrences at intersections. From the estimated results, wider intersections, intersections with a stop sign on all arms, and intersections that have pedestrian signals on some of the arms have a high risk of bicycle accident occurrences. Comparatively, intersections with pedestrian signals at each of the arms and intersections with stop signs on some arms with traffic signals on the other arms display to have less bicycle accident occurrences. Concerning bicycle road effects, the nearest intersections from the Fushimi street bicycle road, have significantly less bicycle accident occurrences, whereas those nearest from the Sakura street bicycle road have higher occurrences. Finally, an intersection design that contributes to the prevention of bicycle accidents was proposed.

DOI： 10.11361/cpijchubu.31.0_31

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CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.eastsj.2020.100022

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.5198/jtlu.2019.1534

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/su11164295

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/su11092621

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Language：English   Publishing type：Research paper (international conference proceedings)  

Language：English   Publishing type：Research paper (international conference proceedings)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.2208/jscejd.63.302

Open Access

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： doi.org/10.2208/journalip.23.1011

Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.1016/j.tra.2003.11.004.

Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

Language：Japanese   Publishing type：Research paper (scientific journal)  

DOI： https://doi.org/10.2208/journalip.19.513

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Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

Authorship：Lead author   Language：English   Publishing type：Research paper (international conference proceedings)  

Event date： 2024.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Event date： 2024.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan  

Event date： 2024.5

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：北海道大学   Country：Japan