{"title":"Synergizing flood risk and road network dynamics for optimized evacuation strategies","authors":"Chaiwat Yaibok , Piyapong Suwanno , Thaksakorn Pornbunyanon , Chollada Kanjanakul , Saksit Bumrungrat , Prasan Jitpat , Noriyasu Tsumita , Atsushi Fukuda","doi":"10.1016/j.eastsj.2024.100137","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100137","url":null,"abstract":"<div><p>In response to escalating climatic threats, this research innovatively integrates flood risk assessment with road network dynamics to formulate optimized evacuation strategies in flood-susceptible regions. Employing a path-based traffic model and flood risk index, our method significantly decreases travel durations by 25% and vehicle hours by 20% compared to traditional frameworks. Complexities arise in intricate evacuation systems. Zone 4 was a critical node due to a 15% rise in vehicular inflow and unique flood risks, emphasizing the necessity for tailored evacuation plans considering variable traffic and flood risks. Our approach enhanced evacuation efficiency and also resulted in a 10% increase in fuel consumption while highlighting areas for further optimization. This study proposes a refined, sustainable evacuation model that harmonizes flood risks and traffic dynamics and offers insights for resilient urban development amid climatic uncertainties.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100137"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000154/pdfft?md5=3ff39f9e196c484a97d147ce2d6ee85c&pid=1-s2.0-S2185556024000154-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140901335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adaptation measures to alleviate degradation of urban mobility by urban flooding in Ubon Ratchathani, Thailand","authors":"Noriyasu Tsumita , Hiroki Kikuchi , Sittha Jaensirisak , Günter Emberger , Atsushi Fukuda","doi":"10.1016/j.eastsj.2024.100145","DOIUrl":"10.1016/j.eastsj.2024.100145","url":null,"abstract":"<div><p>Since floods caused by overflowing rivers are increasing in Southeast Asia cities, reducing urban mobility, adaptation measures are required to cope with this situation. One possible measure would be to develop transportation facilities to make them passable even during flooding conditions. Another measure is to encourage people to relocate from high-risk areas to low-risk areas. Implementing an appropriate combination of these two different adaptation measures is necessary. However, there is limited research to assess the impacts of adaptation measures on flood risk and urban activity. Therefore, this study developed an urban adaptation model that could assess mobility and land use for Ubon Ratchathani, Thailand, and analyzed to what extent the decrease in urban mobility can be alleviated by combining these adaptation measures. It showed that a combination of both adaptation measures could ensure mobility under flood conditions, with benefits from travel time reduction estimated at up to 230.44 million baht (6.36 million USD) over 20 years.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100145"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000233/pdfft?md5=c5d217660666c4e73ec3c5c9b5162481&pid=1-s2.0-S2185556024000233-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141991082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Calibration and validation of the rule-based human driver model for car-following behaviors at roundabout using naturalistic driving data","authors":"Junhee Choi , Dong-Kyu Kim","doi":"10.1016/j.eastsj.2024.100129","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100129","url":null,"abstract":"<div><p>Understanding driver behavior is crucial for introducing roundabouts. This study focuses on calibrating the parameters of the car-following model using naturalistic data and analyzing the appropriateness of different car-following models on the roundabout. We utilize rounD trajectory dataset. This dataset allows for the precise definition of lead and follow vehicles, enabling the calibration of model parameters accordingly. We compared the calibration results for roundabouts with those obtained for signalized intersections from CitySim. Our results show that the Krauss and intelligent driver models (IDM) achieve mean absolute percentage errors of 10.09% and 23.21%, respectively. Furthermore, IDM exhibited higher errors in the circulation segment of the roundabout, while in the exit segment, the Krauss model showed elevated errors. It contrasted with the homogenous results obtained in the signalized intersection. These findings provide valuable insights into driver's behavior on roundabouts.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100129"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000075/pdfft?md5=05e1a5121f51a228da42f37ad15b0444&pid=1-s2.0-S2185556024000075-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140327984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A binomial distribution model for describing pedestrian-vehicle crashes in urban areas","authors":"Yu-Ting HUANG, Tzu-Chang LEE","doi":"10.1016/j.eastsj.2024.100131","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100131","url":null,"abstract":"<div><p>This study aims to investigate the relationship between the numbers of pedestrian-vehicle crashes (PVCs) and the traffic and built environments from a macroscopic perspective. A binomial distribution model has been developed to represent the occurrence of PVCs. To calibrate the model, Bayesian analysis using the Markov chain Monte Carlo method has been employed. The results identify thirteen variables representing urban activities and traffic conditions, including land uses, degrees of mixed use, points of interest, various passage widths, and street hierarchy that significantly impact PVCs. Additionally, the study unveils the spatial distribution of PVC probabilities and exposures. This research contributes to the field by developing an analytical framework for comprehending PVCs from a macroscopic viewpoint, introducing innovative methods for uncovering latent variables, integrating diverse types of data into the analysis, and creating a model for simulating the effects of urban planning revisions and traffic management strategies.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100131"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000099/pdfft?md5=c72d7c139342a78f1e355a3e026c3fa1&pid=1-s2.0-S2185556024000099-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140557556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The heterogeneity in commuters' travel behaviors toward different types of ride-hailing services: The case of Hanoi, Vietnam","authors":"The Huy Tran , Shinji Tanaka , Hoang-Tung Nguyen","doi":"10.1016/j.eastsj.2024.100126","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100126","url":null,"abstract":"<div><p>This study addresses the lack of knowledge regarding the diversity in commuter travel behavior, particularly the effects of different types of ride-hailing services (RHS). It focuses on the distinct impacts of motorcycle-based RHS (MRHS) and car-based RHS (CRHS) on user behaviors. By applying multinomial logit and bivariate probit regression analyses to data from 500 RHS users gathered in March 2023, the study reveals that increases in income and personal vehicle ownership have contrasting effects on MRHS and CRHS usage. Notably, MRHS usage is positively associated with employing RHS as a feeder mode to metro stations, while CRHS usage demonstrates a negative correlation. Furthermore, the study establishes a user preference for MRHS over CRHS during peak traffic times. These insights highlight the importance of creating specific policies for different types of RHS, which is vital for the development of successful urban transportation strategies.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S218555602400004X/pdfft?md5=fb3cec432de572312eee927512c19aeb&pid=1-s2.0-S218555602400004X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140195599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ngo Trung Phuong , Masahiko Kikuchi , Aya Kojima , Hisashi Kubota
{"title":"How will banning motorcycles affect the preferred mode choice of motorcyclists in Hanoi, Vietnam?","authors":"Ngo Trung Phuong , Masahiko Kikuchi , Aya Kojima , Hisashi Kubota","doi":"10.1016/j.eastsj.2024.100150","DOIUrl":"10.1016/j.eastsj.2024.100150","url":null,"abstract":"<div><p>In rapidly urbanizing regions of low- and middle-income countries as found in Asia, transportation management faces significant challenges, particularly with the popularity of two-wheeled vehicles. While these vehicles offer convenience in Asian megacities, their increasing prevalence has led to many urban traffic issues, including air pollution and traffic management problems. Consequently, several countries have contemplated or implemented bans on motorized two-wheeled vehicles in urban areas. With a forthcoming ban on motorcycles in 2030, this study investigates potential switches in transportation travel modes among motorcyclists. Analyzing factors influencing choices between electric bicycles (e-bikes) and buses, the results indicate a probable widespread adoption of e-bikes over buses post-ban. Income, place of residence, and access to bus stops emerge as key determinants.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100150"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000282/pdfft?md5=a535477c27a9a261f365b34750128406&pid=1-s2.0-S2185556024000282-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Emergency shelter location–allocation analysis with time–varying demand","authors":"Eiei Tun, Toshimitsu Nishikiori, Varun Varghese, Makoto Chikaraishi, Miho Seike, Akimasa Fujiwara","doi":"10.1016/j.eastsj.2024.100152","DOIUrl":"10.1016/j.eastsj.2024.100152","url":null,"abstract":"<div><div>The reduction in the overall evacuation time by increasing the number of shelters is desirable. However, policymakers often face resource constraints that limit their ability to open additional shelters. Using the emergency shelter location-allocation model, this study empirically identifies which shelters should be opened given the demand for evacuation varies based on time of day (time-varying demand for each hour) in Higashihiroshima city, Japan. To achieve this, a framework was developed to estimate the time-varying evacuation demand using secondary data sources, followed by an analysis using a location-allocation optimization model. The results show that the dynamic change in evacuation demand over time significantly affects the number and location of shelters to be opened. These findings highlight the importance of time-dependent estimation in disaster response management.</div></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100152"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Evaluating air route performance with context-dependent data envelopment analysis: A case study in Taiwan","authors":"Wen-Chun Tseng , Xin Wang , Yu-Cheng Ting","doi":"10.1016/j.eastsj.2024.100148","DOIUrl":"10.1016/j.eastsj.2024.100148","url":null,"abstract":"<div><p>The aviation industry has a key role in international trade activities. Most studies measure aviation performance based on airlines or airports. However, the frontline operation is delivered via air routes and more operating characteristics can be revealed with route-based performance evaluation. Further, the traditional data envelopment analysis (DEA) approach cannot rank performance in a particular context which represents an efficiency frontier built by decision making units (DMUs). Therefore, this study uses a context-dependent DEA approach to measure and rank the performance of air routes with a case study of 112 international routes from two airlines in Taiwan. Model results identify eight performance levels with most air routes at efficiency performance level 2 and level 3 and most route destinations in East Asia (e.g., Japan). The results of this study can inform operators about a clear relationship between performance and potential markets as well as improvement strategies.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100148"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000269/pdfft?md5=05ddc5eb25ea936a82cd1bf56d648a88&pid=1-s2.0-S2185556024000269-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Proof of concept on district mobility service using small electric vehicles toward realizing a decarbonized city","authors":"Tsuyoshi Takano , Hiroyoshi Morita , Masato Miyata , Chun-Chen Chou , Kento Yoh , Kenji Doi , Theeramunkong Thanaruk","doi":"10.1016/j.eastsj.2024.100142","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100142","url":null,"abstract":"<div><p>Renewing feeder transit services is crucial for maximizing the potential of the public transport system and advancing toward a decarbonized Bangkok. Herein, we propose a smart feeder transit service using small electric vehicles for limited areas (<em>sois</em>) and target facilities in central Bangkok. A 1-year proof of concept was conducted to verify the feasibility and effectiveness of this service and assess its potential for deployment as a new mobility service. We found that 1) the introduction of a small mobility service in <em>sois</em> can considerably reduce both road congestion levels and CO<sub>2</sub> emissions owing to the improved capacity utilization rate, downsizing, and the use of electric vehicles, 2) advantages of scaling could be garnered by expanding the number of facilities to be serviced, and 3) providing a mobility service that is cooperatively operated by neighboring facilities is more convenient and profitable than providing a shuttle service for each facility.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100142"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000208/pdfft?md5=a61f4b6c470e895d5af62a67b1ea75d1&pid=1-s2.0-S2185556024000208-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141543751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A quasi-dynamic location equilibrium model for urban policymaking as autonomous cars increase mobility","authors":"Tetsuji Sato , Kazuma Okada","doi":"10.1016/j.eastsj.2024.100144","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100144","url":null,"abstract":"<div><p>The growing utilization of autonomous cars may affect people's residential location choice behavior and change the population distribution in a city, contrary to compact city policy. This paper proposes a model to estimate the time-series impacts of autonomous cars on population distribution in a city. The model basically consists of the primary factors cohort method and a housing land location equilibrium model. The location equilibrium model considers the residential location choice behavior of individuals, while prior models have been based on the behavior of households. We applied the model to Niigata City, Japan and analyzed the impact of permission to utilize autonomous cars (an increase in car availability to non-drivers) in the whole area of the city and only in the suburbs. Results indicated that permission to utilize autonomous cars only in the suburbs may lead to urban sprawl.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100144"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000221/pdfft?md5=d86a98bf905ea7dbe086ba3e6c1fb028&pid=1-s2.0-S2185556024000221-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141487263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}