Asian Transport Studies最新文献

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Integrating intersectional needs of Filipinos of different ages, disabilities, and socioeconomic classes for inclusive sidewalk design

Asian Transport Studies

Pub Date : 2025-01-01 DOI: 10.1016/j.eastsj.2024.100156

Bernadette Anne Cervania , Gwyneth Dingalsan , Cheska Julianna Go , Dasha Deborah Wu , Krister Ian Daniel Roquel

Everyone is entitled to adequate transit in public spaces, regardless of identity. However, general disregard for pedestrian needs resulted in poor urban planning and neglected walkways, critically affecting individuals of varied physical capabilities. The objectives are to evaluate the state of sidewalks today, pinpoint desirable elements, analyze crucial factors when assessing accessibility using an intersectional perspective, and suggest elements for inclusive design. This study emphasizes the significance of intersectionality in establishing equitable public places by considering the varied experiences of people depending on age, disability, and socioeconomic position. An Analytic Hierarchy Process centering on inclusive designs, with participants of multiple intersectional identities, was employed to generate their priorities. Findings showed mobility is a top criterion, while Transport Disadvantaged Persons facilities are attributes that all identity groups prioritize. This paper shows the differences, similarities, and priorities of 11 identity groups and their intersections with varying difficulty in physically accessing facilities.

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引用次数: 0

Investigating influential factors on pick-up/drop-off location choices for school bus services from parents' perspective: A case study in Hanoi, Vietnam

Asian Transport Studies

Pub Date : 2025-01-01 DOI: 10.1016/j.eastsj.2025.100157

Hung N.V. Do , Akimasa Fujiwara , Thi Anh Hong Nguyen , Canh Do

This study examines factors influencing parents' choices of relocating pick-up/drop-off (PUDO) points of school bus services for six schools in Hanoi. An online survey, in which parents were asked to choose a PUDO point after viewing a video showing current traffic conditions, was administered in November 2022. They were then exposed to a proposal for a new PUDO location that enhanced the school walking environment. The results suggested that parents favor further PUDO locations, enabling their children to participate in longer walks to school and increase their physical activity. However, those observing traffic accidents near school gate areas expressed negative attitudes toward the proposed change. Moreover, the study found no significant decrease in transportation costs setting up PUDO points at a greater distance. Nevertheless, encouraging physical activity and improving students' health could be a policy instrument for decision-makers to set up a designated distant PUDO location in the context of developing Asian cities.

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引用次数: 0

Can diffusion of telework after COVID-19 sustain shrinking cities? Simulation analysis using a dynamic land-use and transport model

Asian Transport Studies

Pub Date : 2025-01-01 DOI: 10.1016/j.eastsj.2024.100155

Hiroki Kikuchi , Atsushi Fukuda , Guenter Emberger

Shrinking cities is an essential strategy in developed countries with population declines, but many new problems also arise. In shrinking cities, sustaining their current urban functions into the future is hard, and they may face city collapse. Conversely, the popularity of telework shows the possibility of maintaining urban activities without shrinking. Therefore, to analyze long-term changes in future urban forms and functions, it is necessary to consider the impact of future technological innovations, such as information and communications technology (ICT), on urban activities, too. This study focuses on telework diffusion, which is one of several technological innovations. We analyze and evaluate its long-term impact on shrinking cities using the land use and transportation model “MARS.” Consequently, it was clarified that even though telework diffusion is difficult to sustain in shrinking cities, governments and municipalities must respond to these negative aspects as telework becomes more widespread for future sustainable shrinking cities.

引用次数: 0

Modeling speed behavior of vehicles in school zones under the impact of motorcycle-dominated societies 模拟摩托车主导社会影响下学校区域车辆的速度行为

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100149

Minh Tan Dang , Quang Huy Vu , Le Minh Kieu , Hoang Tung Nguyen

This study evaluates the free-flow speed of vehicles passing through the 9 school zones in Pleiku City, Vietnam before and after the establishment of the speed limit. The speed data was collected and analyzed by using an image processing technology. The results show that there is a decrease in the speed of vehicles when passing through the school gate, however, it still remains high. After the establishment of the speed limit of 30 kph at the school zone, the speed is likely reduced but not significantly. Furthermore, Maximum Likelihood Estimation method was used to model the speed behavior in the form of normal distribution. The estimated results show a realistic reflection of the observed speed distribution. The results can be applied in making policies to reduce school traffic accidents and to promote active travel on the school journey in countries such as Vietnam or in other countries with relevant contexts.

本研究评估了越南波来古市 9 个学校区域限速前后车辆的自由通行速度。通过图像处理技术收集和分析了车速数据。结果显示，车辆通过学校大门时的速度有所下降，但仍然很高。在学校区域限速 30 公里/小时后，车速可能有所下降，但降幅不大。此外，采用最大似然估计法对车速行为进行了正态分布建模。估计结果真实地反映了观察到的车速分布。这些结果可用于制定政策，以减少学校交通事故，并促进越南等国或其他具有相关背景的国家在上学途中积极出行。

引用次数: 0

What are pedestrian preferences of link and network attributes? Results of conjoint experiments in two Indian cities 行人对链接和网络属性有何偏好？印度两座城市的联合实验结果

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100153

Dipanjan Nag , Arkopal Kishore Goswami

Recent literature underscores perceived walkability as more influential than objective walkability on walking behaviour. However, existing network evaluation tools conduct walking network assessment objectively using spatial data and rarely assess the perceived network-related attributes. This key problem is to be investigated for Indian cities where walking environment improvements are emphasised only on a few link-level (micro-scale) elements and not coherently replicated over the network. The current research evaluates users' preference towards ten link- and three network-related attributes using conjoint analysis. A pictorial survey instrument was created to record users' responses in two Indian cities. Results showed that link and network attributes were jointly more important than link attributes alone. Moreover, practitioners could interpret the ‘middle’ attribute level in a conjoint model and identify low tolerance link and network attributes. These results give decision-makers insight into the type and level of improvements required while enhancing the walking environment.

最近的文献强调，感知的步行可达性比客观的步行可达性对步行行为的影响更大。然而，现有的网络评估工具都是利用空间数据对步行网络进行客观评估，很少对感知到的网络相关属性进行评估。这一关键问题需要针对印度城市进行调查，因为在印度城市，步行环境的改善只被强调在几个链接层面（微观尺度）的元素上，而没有在整个网络中连贯地复制。目前的研究采用联合分析法评估了用户对 10 个链接和 3 个网络相关属性的偏好。在印度的两个城市制作了一个图形调查工具来记录用户的回答。结果显示，链接和网络属性共同比单独的链接属性更重要。此外，从业人员还能解释联合模型中的 "中间 "属性水平，并识别容错率低的链接和网络属性。这些结果让决策者了解到在改善步行环境时所需的改进类型和水平。

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引用次数: 0

The analysis of the shared bike usage pattern: Application of survival model to Taiwan YouBike 共享单车使用模式分析：台湾共享单车生存模型的应用

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100125

Chiang Fu , Barbara T.H. Yen , Chia-Jung Yeh

Shared bike schemes have been implemented worldwide as a first and last-mile service for public transport systems. However, shared bikes can also be used as a primary mode. Riding duration may be a straightforward evaluation criterion to identify the role of shared bikes. This study uses survival models to investigate the critical variables influencing shared bike riding duration with a case study of YouBike in Taiwan. The results show that a survival model with a log-logistic distribution has the best model fit, as some durations are extraordinarily long or short due to the heterogeneity of usage behavior, in which the mean duration was 22 min, but 15% had riding duration longer than 30 min. The riding duration significantly varied with the turnover rate of the station location and the rider's usage behavior based on the variable estimation results. The demand pattern of YouBike riders shows a 96% chance of having a riding duration of fewer than 30 min, dropping below 55% for longer than 90 min. The indicator expressing riding duration for same-station trips is greater than an hour, suggesting that some riders may perceive YouBike as a primary or individual transport mode. The finding also underscores the role of shared bikes in facilitating users' daily activities, such as shopping and recreation, emphasizing their potential as an interchangeable mobility option. This indicates that YouBike is a first and last-mile mode and the primary mode in some cases with longer riding duration. This study redefines the role of shared bikes to promote sustainable transport.

共享自行车计划已在全球范围内实施，作为公共交通系统的 "第一公里 "和 "最后一公里 "服务。不过，共享单车也可以作为主要出行方式。骑行时间可能是确定共享单车作用的直接评估标准。本研究以台湾的 YouBike 为案例，使用生存模型来研究影响共享单车骑行时长的关键变量。结果表明，由于使用行为的异质性，有些骑行时长过长或过短，因此对数-逻辑分布的生存模型具有最佳的模型拟合度，其中平均骑行时长为 22 分钟，但有 15%的骑行时长超过 30 分钟。根据变量估计结果，骑行时长随站点位置的周转率和骑行者的使用行为而明显变化。YouBike 骑行者的需求模式显示，骑行时间少于 30 分钟的几率为 96%，骑行时间超过 90 分钟的几率降至 55%以下。表示同站出行骑行时长的指标大于 1 小时，这表明一些骑行者可能将 YouBike 视为主要或个人交通方式。这一发现还强调了共享单车在方便用户购物和娱乐等日常活动中的作用，强调了其作为一种可互换的移动方式的潜力。这表明，YouBike 是一种 "第一英里 "和 "最后一英里 "模式，在某些情况下是骑行时间较长的主要模式。这项研究重新定义了共享单车在促进可持续交通方面的作用。

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引用次数: 0

Estimation of local pollutant and carbon dioxide emissions of road and rail transportation in the Philippines 菲律宾公路和铁路运输的当地污染物和二氧化碳排放量估算

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100133

Karl B.N. Vergel , Julshabar U. Halil , Cherie Lynne C. Gomintong , Kelvin Ryan S. Marcelo

The 2016 baseline road and rail transportation pollutant emissions in the Philippines using a bottom-up approach are estimated at 9.212 million tons and 377 tons, respectively, while CO₂ emissions are estimated at 97.6 million tons and 62,248 tons, respectively. Road transportation activity is estimated to be 231.53 billion vehicle-kilometers, where 58% is from motorcycles. Top pollutants are CO and VOC from motorcycles, tricycles and cars. Motorcycles contribute the largest share of CO₂ emissions. NOₓ and CO are major pollutants from rail transportation. Based on these results and the assessment of selected transport projects, the government may develop policies on major emitters of criteria pollutants and carbon dioxide, aside from improvement of public transportation. Furthermore, the study is limited in using average vehicle emission factors which need updating.

采用自下而上的方法，菲律宾 2016 年的公路和铁路运输污染物基准排放量估计分别为 921.2 万吨和 377 吨，二氧化碳排放量估计分别为 9760 万吨和 62248 吨。道路运输活动估计为 2,315.3 亿车公里，其中 58% 来自摩托车。主要污染物是摩托车、三轮车和汽车产生的一氧化碳和挥发性有机化合物。摩托车的二氧化碳排放量最大。NOₓ 和 CO 是铁路运输的主要污染物。根据这些结果和对选定交通项目的评估，除了改善公共交通外，政府还可针对标准污染物和二氧化碳的主要排放者制定政策。此外，该研究使用的平均车辆排放系数有限，需要更新。

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引用次数: 0

Airport systems in Japan and the UK: Insights from the power law 日本和英国的机场系统：幂律的启示

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100130

Hidenobu Matsumoto , Koji Domae

The purpose of this paper is to assess the applicability of a power law to the geographical distribution of airports, focusing on domestic passenger traffic in Japan and the UK. After estimating the Pareto exponents using a rank–size regression from the three perspectives of airport traffic, route traffic and interairport distance, this paper examines the competitive or complementary relationship among airports. It analyses route traffic for domestic passengers using a gravity model. The results show and compare how airport systems are shaped in these two countries. The paper sheds light on the power law and refines our understanding of the mechanism underpinning the geographical distribution of airports.

本文旨在评估幂律对机场地理分布的适用性，重点关注日本和英国的国内客运量。本文从机场客流量、航线客流量和机场间距离三个角度，利用秩大小回归法估算了帕累托指数，然后研究了机场之间的竞争或互补关系。本文使用引力模型分析了国内旅客的航线流量。结果显示并比较了这两个国家的机场系统是如何形成的。本文揭示了幂律，完善了我们对机场地理分布机制的理解。

引用次数: 0

A stochastic logistics model for Indonesia's national freight transport model: Transport chain choice from the shipper perspective 印度尼西亚国家货运模式的随机物流模型：从托运人角度选择运输链

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2023.100122

Lydia Novitriana Nur Hidayati , Gerard De Jong , Anthony Whiteing

This paper presents research towards the development of a stochastic approach for estimating the transport chain choice for domestic shipments in Indonesia. This stochastic model aims to improve the logistics choices within Indonesia's national freight transport model (INTRAMOD), which currently handles such choice deterministically. The INTRAMOD logistics model presents five distinct transport chain possibilities involving four main modes: truck, rail, ship, and plane. To acquire the necessary data, revealed preference (RP) and stated preference (SP) survey work has been undertaken. Using the obtained RP/SP data, multinomial logit (MNL) models have been used to estimate the transport choice model. The model with a single time coefficient was found to be superior to the other models. Additionally, this preferred MNL model was extended by segmenting according to shipment characteristics, particularly for high and low value of goods. The results indicate that shipments with a high value of goods are more sensitive to transport time.

本文介绍了为估算印度尼西亚国内货运的运输链选择而开发的随机方法的研究。该随机模型旨在改进印尼国家货运模型（INTRAMOD）中的物流选择，目前该模型是以确定性方式处理物流选择的。INTRAMOD 物流模型提供了五种不同的运输链可能性，涉及四种主要模式：卡车、铁路、轮船和飞机。为了获得必要的数据，我们开展了显性偏好（RP）和显性偏好（SP）调查工作。利用获得的 RP/SP 数据，使用多叉对数（MNL）模型来估算运输选择模型。结果发现，单一时间系数模型优于其他模型。此外，还根据货物特点，特别是高价值和低价值货物的特点，对这一首选 MNL 模型进行了扩展。结果表明，高价值货物对运输时间更为敏感。

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引用次数: 0

Traffic flow characteristics and traffic conflict analysis in the downstream area of expressway toll station based on vehicle trajectory data 基于车辆轨迹数据的高速公路收费站下游区域交通流特征及交通冲突分析

Asian Transport Studies

Pub Date : 2024-01-01 DOI: 10.1016/j.eastsj.2024.100138

Qiaoqiao Ren , Jie He , Ziyang Liu , Min Xu

The limited road space and overlapping driving decisions may cause frequent speed and lane changes in the downstream area of expressway toll stations, which easily cause high accident risks. In this paper, micro vehicle trajectory data in the Huai'an South Toll Station was automatically extracted from aerial videos using the novel YSKT algorithm framework to analyze traffic flow characteristics. To further evaluate vehicle collision risks, the Extended Time-To-Collision (ETTC) and Post Encroachment Time (PET) indicators were employed. The results demonstrated that the longitudinal and lateral velocity and acceleration, the distribution of lane-changing points, lane-changing times, and travel time varied with road sections and vehicle types. Notably, the ETC vehicles had a higher risk of traffic accidents compared to MTC vehicles since their greater initial speed. The findings could provide valuable references for traffic managers to comprehensively understand traffic characteristics and evaluate traffic safety of similar complex road nodes.

在高速公路收费站下游区域，有限的道路空间和重叠的驾驶决策可能导致频繁的车速和变道，极易引发高事故风险。本文利用新颖的 YSKT 算法框架，从航拍视频中自动提取淮安南收费站的微观车辆轨迹数据，分析交通流特征。为进一步评估车辆碰撞风险，采用了碰撞延时（ETTC）和碰撞后时间（PET）指标。结果表明，纵向和横向速度和加速度、变道点分布、变道时间和行驶时间随路段和车辆类型的不同而变化。值得注意的是，与 MTC 车辆相比，ETC 车辆的初始速度更高，因此发生交通事故的风险也更高。研究结果可为交通管理人员全面了解类似复杂道路节点的交通特征和交通安全评估提供有价值的参考。

{"title":"Traffic flow characteristics and traffic conflict analysis in the downstream area of expressway toll station based on vehicle trajectory data","authors":"Qiaoqiao Ren , Jie He , Ziyang Liu , Min Xu","doi":"10.1016/j.eastsj.2024.100138","DOIUrl":"https://doi.org/10.1016/j.eastsj.2024.100138","url":null,"abstract":"<div><p>The limited road space and overlapping driving decisions may cause frequent speed and lane changes in the downstream area of expressway toll stations, which easily cause high accident risks. In this paper, micro vehicle trajectory data in the Huai'an South Toll Station was automatically extracted from aerial videos using the novel YSKT algorithm framework to analyze traffic flow characteristics. To further evaluate vehicle collision risks, the Extended Time-To-Collision (ETTC) and Post Encroachment Time (PET) indicators were employed. The results demonstrated that the longitudinal and lateral velocity and acceleration, the distribution of lane-changing points, lane-changing times, and travel time varied with road sections and vehicle types. Notably, the ETC vehicles had a higher risk of traffic accidents compared to MTC vehicles since their greater initial speed. The findings could provide valuable references for traffic managers to comprehensively understand traffic characteristics and evaluate traffic safety of similar complex road nodes.</p></div>","PeriodicalId":100131,"journal":{"name":"Asian Transport Studies","volume":"10 ","pages":"Article 100138"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2185556024000166/pdfft?md5=c33ac645b939f96ed77e3f8a02983721&pid=1-s2.0-S2185556024000166-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140950845","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}

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