Asian Transport Studies最新文献

{"title":"Prediction of travel time on urban road links with and without point detectors","authors":"Ang Li ,&nbsp;William H.K. Lam ,&nbsp;Mei Lam Tam ,&nbsp;Ren Xin Zhong ,&nbsp;Wei Ma","doi":"10.1016/j.eastsj.2022.100081","DOIUrl":"https://doi.org/10.1016/j.eastsj.2022.100081","url":null,"abstract":"<div><p>This paper proposes a short-term rolling horizon framework for the within-day prediction of travel times on links with and without point detectors (referred to as observed and unobserved links respectively) along a selected path covered in the Hong Kong journey time indication system (JTIS). In Hong Kong JTIS, the number of point detectors on major roads is usually limited due to the financial budget and site constraints in the densely populated urban area. However, the prediction of the travel times on urban road corridors particularly on the links without point detectors is also valuable to road users and traffic authorities. This paper proposes a 2-stage framework based on functional principal component analysis and maximum likelihood estimation method to predict the mean and standard deviation of the travel times on the study path and observed links as well as unobserved links once every 2 min for the next 30 min. An urban road network in Hong Kong is selected as a case study. The prediction results are validated using an independent dataset from JTIS, demonstrating the practical applicability of the proposed framework.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100081"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S218555602200027X/pdfft?md5=69f356f95afcb76e8048b9ebe48fac07&pid=1-s2.0-S218555602200027X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137224411","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":"An improvement on shelter airport selection model during large-scale volcanic disasters: A case study of Hakoneyama Japan","authors":"Saharat Arreeras,&nbsp;Mikiharu Arimura","doi":"10.1016/j.eastsj.2021.100054","DOIUrl":"10.1016/j.eastsj.2021.100054","url":null,"abstract":"<div><p>Through the movement of passengers and cargo, air transportation contributes to economic growth and prosperity. As it expands in size and complexity, it becomes more susceptible to disruptions caused by weather conditions and natural disasters, such as volcanic eruptions. The eruptions of the Eyjafjallajökull and Merapi volcanoes caused significant problems in Europe and central Indonesia concerning air traffic and the economy in 2010. Numerous active volcanoes in Japan could severely disrupt the country's airspace and damage aircraft. The study is aimed at the challenge of determining how to select an airport as a safe place to land during an aircraft evacuation in the event of a volcanic eruption. Airside, airline, and historical data were used to design the shelter airport selection model. Later, it was used to discover an approximate solution for aircraft evacuation using a genetic algorithm (GA).</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100054"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556021000225/pdfft?md5=f806f83ea82321b17b9cf2a4fd209413&pid=1-s2.0-S2185556021000225-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87256124","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":"Analysis of left-turn lane capacity under autonomous vehicle mixed flow considering the influence of pedestrian volume and crosswalk length","authors":"Xin Zhang,&nbsp;Yifei Wang,&nbsp;Hideki Nakamura,&nbsp;Kaixin Liu","doi":"10.1016/j.eastsj.2022.100070","DOIUrl":"10.1016/j.eastsj.2022.100070","url":null,"abstract":"<div><p>Conflicts between pedestrians and left-turning vehicles cause pedestrian safety hazards and decrease vehicle turning capacity at signalized intersections. This commonly occurs in Japan where they share the same traffic light phase. Road capacity is influenced by the interaction between them. Autonomous vehicles (AVs) promise to improve the safety and efficiency of road networks. However, they will face the same problems as human-driven vehicles with pedestrian avoidance. Thus, this study estimated the capacity of the left-turn lane, in Japan, under AV mixed flows taking into account AV penetration rates, pedestrian flow rates, and crosswalk length. The impact of AVs on capacity was analyzed with different settings for the critical gap between vehicles and pedestrians. It was found that if AVs comply perfectly with traffic law, the capacity of the left-turn lane sharply decreases, especially in the case of long crosswalks.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100070"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000165/pdfft?md5=bcb80d03c9a3d25f7e15bb3f4f8cb18a&pid=1-s2.0-S2185556022000165-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89482306","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":"Evaluation of wheelchair accessibility in train stations using a spatial network","authors":"Yuko Arai ,&nbsp;Takahiko Kusakabe ,&nbsp;Yukari Niwa ,&nbsp;Kentaro Honma","doi":"10.1016/j.eastsj.2022.100067","DOIUrl":"10.1016/j.eastsj.2022.100067","url":null,"abstract":"<div><p>The universal design of public transportation is a crucial task worldwide, especially in aging societies. For this reason, public agencies and train operators have advocated for universal architectural design for train stations, for instance, installing elevators and designing step-free routes. However, the location of elevators is often decided on an ad-hoc basis, and wheelchair users are often forced to take unnecessary detours and collision risks. This is because few methodologies are available for making an integrated evaluation of spatial structure and wheelchair accessibility.</p><p>This paper introduces an evaluation framework based on network analysis to evaluate wheelchair accessibility from the aspect of the spatial structure at train stations. Specifically, we first develop weighted network data that describe the spatial structure of train stations in detail to represent the mobility restrictions of wheelchair users and pedestrians. We next propose several indices to evaluate each station in terms of its wheelchair accessibility using these data: “reachable time indices,” which measure the time to the train doors from the ticket gate, and “level of path independence,” which describes the low risk of collisions on paths. This evaluation framework was applied to nine train stations in Tokyo, Japan, as case studies to examine the relationship between spatial structure and wheelchair accessibility. As a result, we found three important relationships. First, placing an elevator in the center of a platform narrows the range of the reachable times for wheelchair users. Second, the proximity of elevator doors to stairs or escalator entrances tends to increase the risk of collisions with pedestrians. Third, a wheelchair stairlift installed in place of elevators increases the minimum reachable time and increases the risk of collisions on designated paths. These insights will be useful for finding facilities that require improvement in the wheelchair accessibility of step-free routes.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100067"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S218555602200013X/pdfft?md5=d7eac68a162c9c980a56e5eeebe66d9a&pid=1-s2.0-S218555602200013X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76842190","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 link-based semi-dynamic user equilibrium traffic assignment model considering signal effect","authors":"Kosuke Koike ,&nbsp;Shoichiro Nakayama ,&nbsp;Hiromichi Yamaguchi","doi":"10.1016/j.eastsj.2022.100062","DOIUrl":"10.1016/j.eastsj.2022.100062","url":null,"abstract":"<div><p>In most cities, traffic conditions vary significantly during the day. A static traffic assignment model may not adequately represent time-dependent congestion phenomena in traffic network analysis. Moreover, a dynamic traffic assignment model is too complex and is computationally intensive. As effective alternatives, various semi-dynamic traffic assignment models have been proposed. This paper develops a link-based semi-dynamic user equilibrium traffic assignment model and extends it to consider the signal delay time. In many cities, the signal cycle length changes during the day related to traffic volume, so its consideration is essential. We have previously reported that if the signal stop time is not considered, the route travel time will be underestimated. Furthermore, the effectiveness of this model is illustrated by applying it to the Kanazawa urban area network.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100062"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000086/pdfft?md5=79701528ad4a2b7bff9bf4a71b323744&pid=1-s2.0-S2185556022000086-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82074144","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":"Mapping the motorcycle-based ride-hailing users in Yogyakarta: An analysis of socio-economic factors and preferences","authors":"Muhammad Zudhy Irawan ,&nbsp;Muhamad Rizki ,&nbsp;Saksith Chalermpong ,&nbsp;Hironori Kato","doi":"10.1016/j.eastsj.2022.100073","DOIUrl":"10.1016/j.eastsj.2022.100073","url":null,"abstract":"<div><p>This study examined the role of socio-economic and preference factors in the frequency of the use of motorcycle-based ride-hailing (MBRH) services, as well as the choices and policy directions between two major MBRH operators in Indonesia: Grab and Gojek. A discrete choice model including ordered, nested, and multinomial logit models were utilized with a sample of 582 MBRH users aged between 18 and 34 years in Yogyakarta, Indonesia. The results show gender, income, motorcycle ownership, and MBRH performances significantly affect the frequency of MBRH use. Meanwhile, socio-economic factors of gender and income, living status, frequency of use, and the MBRH operator's performances, including company profile and apps interface, influence the decision of MBRH operator choice. Furthermore, the difference in age, gender, income, motorcycle ownership, frequency of use, and the perception of MBRH performances as well as social norms also affect policy directions: banned, left unregulated, regulated, and formed partnerships.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100073"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000190/pdfft?md5=2e6f12895243ff0a368be14a451cd1f8&pid=1-s2.0-S2185556022000190-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78299595","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":"Productivity impact of government-led bailout of Japan Airlines","authors":"Katsuhiro Yamaguchi","doi":"10.1016/j.eastsj.2022.100064","DOIUrl":"10.1016/j.eastsj.2022.100064","url":null,"abstract":"<div><p>Over ten years have passed since Japan Airlines (JAL) filed for bankruptcy. This paper treats how the Japanese government undertook the bailout in January 2010 and subsequent measures to facilitate competition between JAL and the other national air carrier, All Nippon Airways (ANA). After describing the bailout process and post-bailout measures regarding slot allocation at Haneda Airport, the paper assesses the impact of these government interventions on airline productivity. Although JAL's total factor productivity (TFP) plunged with bankruptcy, they managed to turn the business around and TFP rapidly recovered thereafter to exceed that of ANA. Regression Discontinuity (RD) design analysis shows evidence of positive impact of these government interventions on TFP growth rate of the two airlines. As of 2016, JAL and ANA's TFP figures are more-or-less equal. In Japan, a new era of competition of the two legacy air carriers has emerged.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100064"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000104/pdfft?md5=7d95ad10114fa217db23eec509c2fbd9&pid=1-s2.0-S2185556022000104-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76712757","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":"Updating function model: Model updating method transferable in a wider range of data sizes","authors":"Nobuhiro Sanko","doi":"10.1016/j.eastsj.2022.100071","DOIUrl":"10.1016/j.eastsj.2022.100071","url":null,"abstract":"<div><p>When data are available from two time points—older data with a larger number of observations and more recent data with a smaller number of observations—then model updating is utilised to take advantage of the different merits of each data set. However, the author's previous study demonstrated that conventional model updating methods—transfer scaling, joint context estimation, Bayesian updating, and combined transfer estimation—were inferior to models using only the more recent data. The present study examines an updating method that the author calls an ‘updating function model’ in which the parameters are assumed to follow the functions of gross domestic product per capita. The present study demonstrates that the updating function model often produces statistically significantly better forecasts than models using only the more recent data. The study extends the applicability of the model updating to cases in which the more recent time point has more observations than the older time point.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100071"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000177/pdfft?md5=6a7f5880c2a041152484b23baa9296d8&pid=1-s2.0-S2185556022000177-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75500285","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":"Safety evaluation of personal mobility vehicles and pedestrians under mixed traffic flow using traffic simulation","authors":"Takayuki Hishikawa ,&nbsp;Miho Iryo-Asano","doi":"10.1016/j.eastsj.2021.100049","DOIUrl":"10.1016/j.eastsj.2021.100049","url":null,"abstract":"<div><p>Personal mobility vehicles (PMVs) are small and slow vehicles that are designed to move within relatively dense pedestrian traffic on sidewalks or shared-use paths. Although various types of PMVs have been developed recently, the requirements of PMV performance in various traffic conditions are yet to be discussed in depth. This study aims to evaluate the impact of geometry and traffic conditions on the safety of mixed traffic flow between pedestrians and standing-type PMVs using a traffic simulation model. As a surrogate safety measure, an objective risk index based on collision probability and collision intensity is proposed. The results of the traffic simulations showed that the objective risk was affected by sidewalk width, traffic demand, and PMV movement parameters. A linear regression model was estimated to explain the safety index as a function of these variables, and combinations of applicable settings for PMV–pedestrian mixed traffic flow in terms of safety are discussed.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100049"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556021000171/pdfft?md5=899dd04e582ba3435bceb7deddbf7e52&pid=1-s2.0-S2185556021000171-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73742462","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":"Analysis of the single-regime speed-density fundamental relationships for varying spatiotemporal resolution using Zen Traffic Data","authors":"Garima Dahiya,&nbsp;Yasuo Asakura,&nbsp;Wataru Nakanishi","doi":"10.1016/j.eastsj.2022.100066","DOIUrl":"10.1016/j.eastsj.2022.100066","url":null,"abstract":"<div><p>This study analyzed the single-regime speed-density (<em>v-k</em>) relationships for urban expressways using high resolution Zen Traffic Data (ZTD) containing all vehicles’ trajectory data obtained using image sensing technology. The steady-state traffic data were extracted for varying spatiotemporal resolutions, followed by estimation of traffic flow parameters, namely, jam density, kinematic-wave-speed, and proportionality factor, a behavioral parameter, using empirical data. Functional and shape parameters were estimated using the Levenberg–Marquardt algorithm. Statistical metrics were used to assess the performance and model fitness in all categories of linear, exponential and logarithmic, and complex forms of <em>v-k</em> relationships for different resolutions. The theoretical analysis revealed that certain relationships satisfy all the static properties and that only one satisfies both the dynamic properties of traffic behavior. Highly parameterized forms had the lowest errors. However, the linear form of model developed by May and Keller has high application potential.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"8 ","pages":"Article 100066"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556022000128/pdfft?md5=4ab3d9f56e775bb9666be9c14fd16d10&pid=1-s2.0-S2185556022000128-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80040419","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}