基于TTC冲突风险的加速车道合流标线设置方法  

A Method for Setting Confluence Marking on Acceleration Lane Based on TTC Conflict Risk

作　　者：高沛 邵超逸 周荣贵[1] 周建[1] 李欣[1] GAO Pei;SHAO Chao-yi;ZHOU Rong-gui;ZHOU Jian;LI Xin(Research Institute of Highway,Ministry of Transport,Beijing 100088,China;Guangzhou Expressway Co.,Ltd.,Guangzhou Guangdong 510000,China)

机构地区：[1]交通运输部公路科学研究院,北京100088 [2]广州市高速公路有限公司,广东广州510000

出　　处：《公路交通科技》2024年第1期152-159,共8页Journal of Highway and Transportation Research and Development

基　　金：城市群地区高速公路“韧性”设计运营关键技术研究与示范项目(2021-ZD2-051)。

摘　　要：为了提高合流区域的安全性,分析了不同形式的交通设施对合流车辆的影响,研究了考虑速度离散性的加速车道安全合流设施设置方法。首先,以减小合流区的速度离散性为目的,基于车辆的实测加速与换道过程,分析了车辆在合流鼻后的运动过程。其次,基于驾驶员实际换道位置需求,构建了合流区禁止跨越同向车行道分界线(禁止跨越标线)长度计算模型,采用了重复仿真的方式确定最大值的要求。然后采用双向4车道作为仿真模型,对比分析了主线、匝道在不同流量、车速下的标线长度,总结了禁止跨越标线长度的演化规律。最后,基于实测数据搭建VISSIM仿真模型,以交通冲突为评价指标对设置效果进行了验证,分析在不同流量、主线速度、匝道速度组合下的禁止跨越标线设置必要性。结果表明:主线交通量增大,需设置的长度越长;主线与匝道速度差越大,标线长度越长;主线车速越大,标线长度越长,匝道车速越大,标线长度越短;主线流量在1级、2级上半段时的追尾与换道冲突明显减少,此时宜设置;在2级下半段之后时,换道冲突有所减少,但追尾冲突显著增加,需要结合最外侧车道车型比例等交通条件进行控制;在3级服务水平下,施画禁止跨越标线导致追尾冲突显著增加,换道冲突无显著变化,不建议设置。禁止跨越标线的设置能够进一步增加车辆加速空间,提高汇入速度,提升合流的安全性。In order to enhance the safety of merging areas,the impact of different forms of traffic facilities on merging vehicles is analyzed,and the methods for setting up safe merging facilities considering speed variation on acceleration lanes are investigated.Firstly,using speed variation as a safety evaluation indicator and based on the vehicle’s acceleration and lane-changing processes,the motion process of vehicles behind the merging nose is analyzed.Secondly,Considering the actual lane-changing position requirements of drivers,a model for calculating the length of the prohibited crossing marking(forbidding crossing the samedirection carriageway boundary line)in the merging area is constructed.Then,the maximum requirements are determined by using repeated simulations.A two-way four-lane model is used for simulation,and a comparative analysis of the length of prohibited crossing marking on the mainline and ramp under different flow rates and speeds is conducted.The evolution pattern of the prohibited crossing marking length is summarized.Finally,VISSIM simulation model is built based on the measured data,and the setting effect is verified with traffic conflicts as the evaluation indicators.The necessity of setting the prohibited crossing marking with different flow rates,mainline speeds and ramp speeds is analyzed.The result shows that(1)as the mainline traffic volume increases,the required length of the prohibited crossing marking also increases;(2)the greater the speed difference between the mainline and the ramp,the longer the prohibited crossing marking;(3)as the mainline speed increases,the prohibited crossing marking length also increases,while it decreases with increasing ramp speed;(4)when the mainline traffic volume is in the upper half of level 1 and level 2,rear-end and lane-changing conflicts significantly decrease,while the setting is suggested,after the lower half of level 2,lane-changing conflicts decrease,but rear-end conflicts significantly increase,the control measures should be implemented consid

关 键 词：交通安全 禁止跨越标线 微观仿真 交通冲突 合流区 

分 类 号：U491[交通运输工程—交通运输规划与管理]