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A review of traffic behaviour and intelligent driving at roundabouts based on a microscopic perspective

Transportation Safety and Environment 2024年第3期6卷 1-16页

作者： Haobin Jiang Qingyuan Shen Aoxue Li Chenhui Yin Automotive Engineering Research Institute Jiangsu UniversityZhenjiang 212013JiangsuChina School of Automotive and traffic Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

The contradiction between increasing traffic and the relatively poor roundabout infrastructure is getting *** control and optimization of the macroscopic traffic flow needs to be improved to resolve congestion and safety problems at roundabouts and the connected road *** order to better understand the gaps and trends in this field,we have systematically reviewed the main research and developments in traffic phenomena,driving behaviour,autonomous vehicles(AVs),intelligent connected vehicles and real vehicle trajectory data sets at *** study is based on 388 papers about roundabouts,selected through a comprehensive literature *** review demonstrates that based on a microscopic perspective,sensing,prediction,decision-making,planning and control aspects of AVs and intelligent connected vehicles can be designed and optimized to fundamentally and significantly improve traffic capacity and driving safety at ***,the generation mechanism of traffic conflicts among traffic participants at roundabouts is complex,which is a tremendous challenge for the systematic design of ***,based on naturalistic driving data and machine learning theory,it is an important research direction to build driver models by learning and imitating human driver decision-making and driving behaviours.

关键词： autonomous vehicles driving behaviour naturalistic driving data roundabout traffic capacity

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维普期刊数据库

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Priority access for QoS support in distributed wireless networks

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Journal of Systems Engineering and Electronics 2019年第6期30卷 1202-1211页

作者： ZHOU Xin ZHENG Changwen Institute of Software Chinese Academy of Sciences

Guaranteed quality of service(QoS) support has been an open issue of distributed wireless networks for years. The IEEE802.11 e provides a valuable method for this purpose. However, it could only provide service differentiation, rather than service guarantee, for multi-priority traffic. Many studies have tried to improve its QoS ability, but still leave some problems. This paper investigates these problems and proposes a scheme called the priority access based on busy tone(PABT) to improve the Qo S performance. To guarantee the priority channel access, this scheme uses an in-band busy tone to limit the transmission of lower-priority traffic when higher-priority traffic has packets to send. Based on that, it also optimizes the contention window tuning according to the flows number of each traffic type individually, in order to improve the throughput as well as the traffic capacity. Simulation results show that the proposed scheme significantly improves the real-time traffic capacity, throughput, delay, fairness and packet loss rate.

关键词： 802.11e quality of service(QoS) busy tone priority access traffic capacity contention window

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维普期刊数据库

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Urban One-way traffic Organization and Its Evaluation

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Journal of Harbin Institute of Technology(New Series) 2004年第2期11卷 121-124页

作者：裴玉龙伊新苗 School of Transportation Science and Engineering Harbin Institute of Technology Harbin 150090 China School of Transportation Science and Engineering Harbin Institute of Technology Harbin 150090 Chinane-way traffic organization is a direct efficient and economic method to solve traffic congestion and expand traffie capacity. With its evolution advantages and disadvantages introduced its setting conditions demonstrated. The general method and processes are summarized in planning for urban one-way streets project viz. investigation drawing out and evaluation of project selecting of project and beneficial analysis. Fuzzy synthetical evaluation other fields is employed to evaluate the project. Its evaluation system and method is introduced and Delphi method is adopted to obtain evaluation index. Finally taking Harbin city as an example the application process of above-mentioned method is illuminated. Accordingly it is proved that the method is exercisable.

One-way traffic organization is a direct, efficient and economic method to solve traffic congestion and expand traffie capacity. With its evolution, advantages and disadvantages introduced its setting conditions demonstrated. The general method and processes are summarized in planning for urban one-way streets project, viz. investigation, drawing out and evaluation of project, selecting of project and beneficial analysis. Fuzzy synthetical evaluation other fields is employed to evaluate the project. Its evaluation system and method is introduced and Delphi method is adopted to obtain evaluation index. Finally, taking Harbin city as an example, the application process of above-mentioned method is illuminated. Accordingly, it is proved that the method is exercisable.

关键词： one-way traffic organization traffic congestion traffic capacity

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维普期刊数据库

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Multi-Objective Optimization of traffic Signal Timing at Typical Junctions Based on Genetic Algorithms

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Computer Systems Science & Engineering 2023年第11期47卷 1901-1917页

作者： Zeyu Zhang Han Zhu Wei Zhang Zhiming Cai Linkai Zhu Zefeng Li Faculty of Applied Sciences Macao Polytechnic UniversityMacao999078China Faculty of Data Science City University of MacaoMacao999078China

With the rapid development of urban road traffic and the increasing number of vehicles,how to alleviate traffic congestion is one of the hot issues that need to be urgently addressed in building smart ***,in this paper,a nonlinear multi-objective optimization model of urban intersection signal timing based on a Genetic Algorithm was ***,a typical urban intersection was selected as the research object,and drivers’acceleration habits were taken into ***’s more,the shortest average delay time,the least average number of stops,and the maximum capacity of the intersection were regarded as the optimization *** optimization results show that compared with the Webster method when the vehicle speed is 60 km/h and the acceleration is 2.5 m/s^(2),the signal intersection timing scheme based on the proposed Genetic Algorithm multi-objective optimization reduces the intersection signal cycle time by 14.6%,the average vehicle delay time by 12.9%,the capacity by 16.2%,and the average number of vehicles stop by 0.4%.To verify the simulation results,the authors imported the optimized timing scheme into the constructed Simulation of the Urban Mobility *** experimental results show that the authors optimized timing scheme is superior to Webster’s in terms of vehicle average loss time reduction,carbon monoxide emission,particulate matter emission,and vehicle fuel *** research in this paper provides a basis for Genetic algorithms in traffic signal control.

关键词： Multi-objective GA optimization traffic light timings average delay time the average number of stops traffic capacity SUMO simulation

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Studies on the capacity of Vehicles at Conflict Points Based on Microscopic Simulation

Studies on the Capacity of Vehicles at Conflict Points Based...

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2009中国控制与决策会议

作者： Zhen YANG,Hui WANG~1,Hong LIU 1.Control Science and Engineering,Zhejiang University,Hangzhou 310027

In order to study the capacity of vehicles at conflict points in intersections,and to obtain the passing flow rate of the two conflict streams,this paper provides an in-depth analysis of the dynamic characteristics of vehicles at the conflict points,as well as the two major parameters-the time headway and the critical *** simulation is used to achieve qualitative analysis of the vehicles capacity at conflict points,which demonstrates the basic characters of the vehicles capacity at conflict points.

关键词： Conflict point Microscopic simulation traffic capacity

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