双前导车影响下高速公路施工路段混行交通流仿真  

Simulation of Mixed Traffic Flow on Expressway Construction Section under Influence of Double Leading Vehicles

作　　者：罗京[1] 连萌 李伟[3] 王宝杰[3] LUO Jing;LIAN Meng;LI Wei;WANG Bao-jie(CCCC First Highway Consultants Co.,Ltd.,Xi'an Shaanxi 710075,China;Shenzhen Expressway Co.,Ltd.,Shenzhen Guangdong 518026,China;School of Transportation Engineering,Chang'an University,Xi'an Shaanxi 710064,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075 [2]深圳高速公路股份有限公司,广东深圳518026 [3]长安大学运输工程学院,陕西西安710064

出　　处：《公路交通科技》2022年第11期151-157,共7页Journal of Highway and Transportation Research and Development

基　　金：2020年度交通运输行业重点科技项目(2020-MS5-150)。

摘　　要：为了研究高速公路不中断交通条件下施工围挡对交通流运行的影响,建立了高速公路施工路段交通流仿真模型场景。考虑到因驾驶员视线高度差异(相比小汽车受单前导车的影响,货车的跟驰行为受到双前导车的影响),确定了小汽车和货车混行条件下的跟驰模型和换道模型。应用Matlab进行了数值仿真,研究了货车混入率对交通流拥堵状况、车辆行驶速度和路段通行能力的影响。结果表明:随着货车混入率的增加,货车在施工路段行驶会使车辆不能从临近施工区的外侧车道及时汇入中间车道,施工路段拥堵状况恶化,车辆行驶速度受限,路段通行能力下降;相较于中小型货车,大型货车混入率的增加对车流运行稳定性影响更大。随着货车混入率的增加,路段通行能力下降,当货车混入率增加到30%之后,路段通行能力从1750 veh/h降低到1500 veh/h,随后通行能力的变化趋于稳定;通过Vissim建立同一交通场景仿真得到的通行能力变化与Matlab仿真得到的结果一致,证实了货车混入率对施工路段通行能力的不利影响。货车通行对高速公路施工路段的通行效率和行车安全产生不利影响,应在施工路段上游提前引导大型货车绕行分流,限制大型货车的驶入,从源头避免货车对施工路段交通的不利影响。In order to study the influence of construction enclosure on traffic flow under the condition of uninterrupted traffic of expressway,a traffic flow simulation model scene of expressway construction section is established.Considering the difference of drivers’sight lines(compared with the car affected by single leading vehicle,the truck’s following behavior is affected by double leading vehicles),the following model and lane changing model under the condition of mixed cars and trucks are determined.The numerical simulation is conducted by using Matlab,and the influences of truck mixing rate on traffic flow congestion,vehicle speed and road capacity are studied.The result shows that(1)With the increase of truck mixing rate,trucks driving on the construction section will make it impossible for the vehicles to merge into the middle lane from the outer lane adjacent to the construction area in time,which will worsen the congestion of the construction section,restrict the vehicle speed and reduce the traffic capacity of the section.(2)Compared with small and medium-sized trucks,the increase in the mixing rate of large trucks has a greater influence on the stability of traffic flow.With the increase of the truck mixing rate,the traffic capacity of the road section decreases.When the truck mixing rate increases to 30%,the traffic capacity of the road section decreases from 1750 vehicle/h to 1500 vehicle/h,and then the change of traffic capacity tends to be stable.(3)The change of the traffic capacity obtained by the simulation of the same traffic scene established by Vissim is consistent with the result obtained by the Matlab simulation,which confirmed the adverse influence of the truck mixing rate on the traffic capacity of the construction section.(4)The passage of trucks will adversely affect the traffic efficiency and driving safety of the expressway construction section.Large trucks should be guided to bypass and divert in advance at the upstream of the construction section to limit the entry of large trucks and

关 键 词：交通工程 高速公路 施工路段 数值仿真 双前导车 客货混行 

分 类 号：U491.14[交通运输工程—交通运输规划与管理]