摘要
【目标】为揭示重载车流对入口匝道系统的影响,构建入口匝道异质交通流模型,探究异质重载车辆对合流区交通流特性的影响。【方法】采用一种改进的双车道元胞自动机模型,基于车辆行驶行为特性优化变道规则,建立入口匝道系统异质交通流模型,研究重载货车工况下主路交通流与匝道交通流对合流区域交通流特性的影响。【结果】随着重载货车比例增加,入口匝道系统合流区域的交通拥堵程度加剧,饱和流量下降。保持匝道进车概率及重载货车比例不变,当主路进车概率低于0.4时,合流区域的交通流量随主路进车概率的增加而上升。主路重载货车比例的增大影响合流区性能,主路进车概率临界值和饱和流量均随主路重载货车比例的增大而减小。保持主路进车概率及重载货车占比不变,当匝道进车概率小于0.3时,合流区速度随匝道进车概率增大而减小,匝道重载货车比例增大对合流区流量影响较小,但对合流区速度影响明显。【结论】考虑入口匝道交通流异质性的交通模型,能有效降低入口匝道区域发生交通拥堵的概率。
[Objective]The study investigated the influence of heavy-duty vehicles flow on the on-ramp system.The heterogeneous traffic flow model was developed for the on-ramp,aiming to examine how heterogeneous heavy-duty vehicles affect the traffic flow characteristics in merging areas.[Method]An improved two-lane cellular automaton model was employed in this study.By analyzing the characteristics of vehicle driving behaviors,the lane-changing rules were systematically optimized.The heterogeneous traffic flow model for the on-ramp system was developed with the aim of investigating how the traffic flows on main road and ramp affect the traffic characteristics in merging areas in heavy-duty truck operating conditions.[Result]As the proportion of heavy-duty trucks increases,the traffic congestion in merging areas of on-ramp system becomes more pronounced,accompanied by a corresponding reduction in the saturation flow rate.When the on-ramp entry probability and the proportion of heavy-duty trucks remain unchanged,the traffic flow in merging areas increases with the main road entry probability,which is below 0.4.The increase of heavy-duty trucks proportion on the main road negatively influences the performance of merging areas.Both the critical entry probability from main road and the saturation flow exhibit the decreasing trend as the proportion of heavy-duty trucks on main road increases.When the main road entry probability and the proportion of heavy-duty trucks remain unchanged,the speed in merging areas decreases as the on-ramp entry probability increases,which is below 0.3.The increase of heavy-duty trucks proportion on the ramp has a relatively small influence on the flow in merging areas,but has the significant effect on the speed.[Conclusion]The model,considering on-ramp heterogeneous traffic flow,can effectively reduce the probability of on-ramp traffic congestion.
作者
桂水荣
蓝天飞
何锐
GUI Shuirong;LAN Tianfei;HE Rui(State Key Laboratory for Safety and Resilience of Civil Engineering in Mountainous Area,Nanchang,Jiangxi 330013,China;School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang,Jiangxi 330013,China;Jiangxi Province Gannan Highway Survey and Design Institute Co.,Ltd.,Ganzhou,Jiangxi 341000,China)
出处
《公路交通科技》
北大核心
2025年第8期18-26,共9页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(52268026,12062006)。
关键词
智能交通
入口匝道系统
元胞自动机
异质交通流
模型仿真
intelligent transport
on-ramp system
cellular automata
heterogeneous traffic flow
simulation model
作者简介
桂水荣(1979-),女,江西九江人,博士,副教授,研究方向为随机车流模拟、公路桥梁车桥耦合振动。(guishuirong@163.com);通讯作者:蓝天飞(1995-),男,江西赣州人,硕士,研究方向为随机车流模拟。(969075057@qq.com)。
