Communications in Transportation Research最新文献_第9页

A topology-based bounded rationality day-to-day traffic assignment model 基于拓扑的有限理性日常流量分配模型

Communications in Transportation Research Pub Date : 2022-12-01 DOI: 10.1016/j.commtr.2022.100076

Enrico Siri, Silvia Siri, Simona Sacone

{"title":"A topology-based bounded rationality day-to-day traffic assignment model","authors":"Enrico Siri, Silvia Siri, Simona Sacone","doi":"10.1016/j.commtr.2022.100076","DOIUrl":"10.1016/j.commtr.2022.100076","url":null,"abstract":"<div><p>This paper analyzes the day-to-day adjustment process of users’ behaviors in a transport network which is affected by relevant alterations such as disruptions due to critical events which cause the impossibility to use one or more links. For representing the progressive adjustment of the flows on the network to reach a new equilibrium, a day-to-day discrete-time model is proposed, based on the idea that people are bounded rational in their choices, i.e. they often do not behave according to the optimal solution but they accept solutions they consider satisfying. Users, in their choice process, are influenced by the topological similarity between the route they are currently using and others. This means that they tend to prefer the solutions that are more similar to the one they are already using. In parallel, users exhibit a myopic behavior, i.e., they tend to overestimate the goodness of a route if, when using it, they suddenly experience a significant reduction in travel time compared to what they are used to. In the paper it is shown that such route choice behaviour implies that the steady state of the system corresponds to a Bounded Rational User Equilibrium, i.e., a state that does not diverge from the user equilibrium more than a certain value which increases when the relative importance given to the topological similarity grows. The model also assumes that these biases vanish, at least with respect to those routes that are most frequently used by users, after a sufficient amount of time. Under certain conditions, it is then shown that the steady state can eventually collapse into a User Equilibrium. The effectiveness of the proposed model is assessed via simulation results in which two test networks are analyzed in detail to show the evolution of the users’ behaviour in a transport network after a disruption.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772424722000269/pdfft?md5=8050d96b5b893981d911a19abd69903c&pid=1-s2.0-S2772424722000269-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76475520","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}

引用次数: 7

On the performance of shared autonomous bicycles: A simulation study 共享自主自行车性能的仿真研究

Communications in Transportation Research Pub Date : 2022-12-01 DOI: 10.1016/j.commtr.2022.100066

Naroa Coretti Sanchez , Iñigo Martinez , Luis Alonso Pastor , Kent Larson

{"title":"On the performance of shared autonomous bicycles: A simulation study","authors":"Naroa Coretti Sanchez , Iñigo Martinez , Luis Alonso Pastor , Kent Larson","doi":"10.1016/j.commtr.2022.100066","DOIUrl":"10.1016/j.commtr.2022.100066","url":null,"abstract":"<div><p>As society faces global challenges such as population growth and climate change, rethinking cities is now more imperative than ever. The design of cities can not be abstracted from the design of their mobility systems. Therefore, efficient solutions must be found to transport people and goods throughout the city efficiently and ecologically. An autonomous bicycle-sharing system would combine the most relevant benefits of vehicle-sharing, autonomy, and micro-mobility, increasing the efficiency and convenience of bicycle-sharing systems and incentivizing more people to bike and enjoy their cities in an environmentally friendly way. Due to the novelty of introducing autonomous driving technology into bicycle-sharing systems and their inherent complexity, there is a need to quantify the potential impact of autonomy on fleet performance and user experience. This paper presents the results of an agent-based simulation that provides an in-depth understanding of the fleet behavior of autonomous bicycle-sharing systems in realistic scenarios, including a rebalancing system based on demand prediction. In addition, this work describes the impact of different parameters on system efficiency and service quality. Finally, it quantifies the extent to which an autonomous system would outperform current station-based and dockless bicycle-sharing schemes. The obtained results show that with a fleet size three and a half times smaller than a station-based system and eight times smaller than a dockless system, an autonomous system can improve overall performance and user experience even with no rebalancing.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772424722000166/pdfft?md5=fcede1c13becb7a8651ba2c2db6124ad&pid=1-s2.0-S2772424722000166-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74106012","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}

引用次数: 8

Optimality analysis of train platforming and routing with different interlocking modes 不同联锁方式下列车站台与路线优化分析

Communications in Transportation Research Pub Date : 2022-12-01 DOI: 10.1016/j.commtr.2022.100061

Yuan Wang, Xiaopeng Li

{"title":"Optimality analysis of train platforming and routing with different interlocking modes","authors":"Yuan Wang, Xiaopeng Li","doi":"10.1016/j.commtr.2022.100061","DOIUrl":"10.1016/j.commtr.2022.100061","url":null,"abstract":"<div><p>The train platforming and routing (TPR) problem is to decide train operations within stations after the network-wise train schedules are determined. A feasible TPR plan requires both platform and route conflict-free, where the avoidance of route conflict is controlled according to three interlocking modes. Although the TPR problem is widely studied, none of them did a serious investigation on the optimality impacts of different interlocking modes in the TPR. Therefore, this paper introduced and formulated a space–time version of TPR considering three interlocking modes and subsequentially conducted numerical experiments to analyze the optimality differences under each mode. Based on the experimental findings, engineering practical suggestions are also provided. In summary, the experiment results showed that both route-locking sectional-release and sectional-locking sectional-release modes significantly outperform the route-locking route-release mode. And among them, using the route-locking sectional-release mode can bring notable benefits on large stations with high-density volumes while using the sectional-locking sectional-release mode can always provide outstanding outcomes over various station and traffic settings.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772424722000117/pdfft?md5=b66fb68db92dac3fea915205d79de196&pid=1-s2.0-S2772424722000117-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72780721","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}

引用次数: 3

Investigating social media spatiotemporal transferability for transport 调查社交媒体的时空可转移性

Communications in Transportation Research Pub Date : 2022-12-01 DOI: 10.1016/j.commtr.2022.100081

Emmanouil Chaniotakis , Mohamed Abouelela , Constantinos Antoniou , Konstadinos Goulias

{"title":"Investigating social media spatiotemporal transferability for transport","authors":"Emmanouil Chaniotakis , Mohamed Abouelela , Constantinos Antoniou , Konstadinos Goulias","doi":"10.1016/j.commtr.2022.100081","DOIUrl":"10.1016/j.commtr.2022.100081","url":null,"abstract":"<div><p>Social Media have increasingly provided data about the movement of people in cities making them useful in understanding the daily life of people in different geographies. Particularly useful for travel analysis is when Social Media users allow (voluntarily or not) tracing their movement using geotagged information of their communication with these online platforms. In this paper we use geotagged tweets from 10 cities in the European Union and United States of America to extract spatiotemporal patterns, study differences and commonalities among these cities, and explore the nature of user location recurrence. The analysis here shows the distinction between residents and tourists is fundamental for the development of city-wide models. Identification of repeated rates of location (recurrence) can be used to define activity spaces. Differences and similarities across different geographies emerge from this analysis in terms of local distributions but also in terms of the worldwide reach among the cities explored here. The comparison of the temporal signature between geotagged and non-geotagged tweets also shows similar temporal distributions that capture in essence city rhythms of tweets and activity spaces.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772424722000312/pdfft?md5=6f7cce7ae76c54dacaf8db2857b64682&pid=1-s2.0-S2772424722000312-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84911428","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}

引用次数: 2

Why are COVID-19 travel bubbles a tightrope walk? An investigation based on the Trans-Tasmanian case 为什么COVID-19旅行泡沫像走钢丝一样?根据跨塔斯马尼亚的案子进行调查

Communications in Transportation Research Pub Date : 2022-11-21 DOI: 10.1016/j.commtr.2022.100089

Xiaoqian Sun , Sebastian Wandelt , Anming Zhang

{"title":"Why are COVID-19 travel bubbles a tightrope walk? An investigation based on the Trans-Tasmanian case","authors":"Xiaoqian Sun , Sebastian Wandelt , Anming Zhang","doi":"10.1016/j.commtr.2022.100089","DOIUrl":"https://doi.org/10.1016/j.commtr.2022.100089","url":null,"abstract":"<div><p>The COVID-19 pandemic has hit the transportation sector hard; particularly air transportation, as a major mode of long-distance transportation, has been affected tremendously. Since the dawn of COVID-19, politicians and policy makers have discussed the idea of introducing travel bubbles between countries (or counties), to allow for a continued exchange of people and goods. The eponymous Trans-Tasmanian travel bubble is a major example, involving quarantine-free travel between Australia and New Zealand. While both countries have tried to form a travel bubble various times, recurring setbacks and difficulties were faced. In October 2021, this ambitious project presumably has come to an end, with both countries announcing the essential capitulation of their COVIDZero strategies and a planned opening towards broader international travel. In this study, we perform a close investigation of the history behind the Trans-Tasmanian travel bubble as an on-off relationship, identifying a set of drivers for the serious problems involving a sustainable setup and operation. We develop a framework which represents important factors for successful travel bubbles and believe that the satisfaction of all factors at once is extremely challenging. Our results and insights are not specific to the Trans-Tasmanian case only, although it is taken as a running example, but can be generalized to various scales and environments. We hope that our study contributes to the literature by improving our understanding of the highly buzzed travel bubble concept, while providing empirical evidence for the troubles that inherently make such bubbles a tightrope walk.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49710073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the simulation of shared autonomous micro-mobility 共享自主微移动仿真研究

Communications in Transportation Research Pub Date : 2022-01-01 DOI: 10.1016/j.commtr.2022.100065

Naroa Coretti Sanchez, Iñigo Martinez, Luis Alonso Pastor, K. Larson

引用次数: 8

Future transportation: Sustainability, complexity and individualization of choices 未来交通:可持续性、复杂性和个性化选择

Communications in Transportation Research Pub Date : 2021-12-01 DOI: 10.1016/j.commtr.2021.100010

Juan de Dios Ortúzar

引用次数: 42

Connected autonomous vehicles for improving mixed traffic efficiency in unsignalized intersections with deep reinforcement learning 利用深度强化学习提高无信号交叉口混合交通效率的联网自动驾驶汽车

Communications in Transportation Research Pub Date : 2021-12-01 DOI: 10.1016/j.commtr.2021.100017

Bile Peng , Musa Furkan Keskin , Balázs Kulcsár , Henk Wymeersch

{"title":"Connected autonomous vehicles for improving mixed traffic efficiency in unsignalized intersections with deep reinforcement learning","authors":"Bile Peng , Musa Furkan Keskin , Balázs Kulcsár , Henk Wymeersch","doi":"10.1016/j.commtr.2021.100017","DOIUrl":"10.1016/j.commtr.2021.100017","url":null,"abstract":"<div><p>Human driven vehicles (HDVs) with selfish objectives cause low traffic efficiency in an un-signalized intersection. On the other hand, autonomous vehicles can overcome this inefficiency through perfect coordination. In this paper, we propose an intermediate solution, where we use vehicular communication and a small number of autonomous vehicles to improve the transportation system efficiency in such intersections. In our solution, two connected autonomous vehicles (CAVs) lead multiple HDVs in a double-lane intersection in order to avoid congestion in front of the intersection. The CAVs are able to communicate and coordinate their behavior, which is controlled by a deep reinforcement learning (DRL) agent. We design an altruistic reward function which enables CAVs to adjust their velocities flexibly in order to avoid queuing in front of the intersection. The proximal policy optimization (PPO) algorithm is applied to train the policy and the generalized advantage estimation (GAE) is used to estimate state values. Training results show that two CAVs are able to achieve significantly better traffic efficiency compared to similar scenarios without and with one altruistic autonomous vehicle.</p></div>","PeriodicalId":100292,"journal":{"name":"Communications in Transportation Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2772424721000172/pdfft?md5=a87e0e5f5574af473779e0eb84aa54f7&pid=1-s2.0-S2772424721000172-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79348197","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}

引用次数: 60

Paradox of international maritime organization's carbon intensity indicator 国际海事组织碳强度指标的悖论

Communications in Transportation Research Pub Date : 2021-12-01 DOI: 10.1016/j.commtr.2021.100005

Shuaian Wang , Harilaos N. Psaraftis , Jingwen Qi

引用次数: 51

Reasons, challenges, and some tools for doing reproducible transportation research 原因，挑战，以及进行可复制运输研究的一些工具

Communications in Transportation Research Pub Date : 2021-12-01 DOI: 10.1016/j.commtr.2021.100004

Zuduo Zheng

引用次数: 32