A Modified Post Encroachment Time Model of Urban Road Merging Area Based on Lane-Change Characteristics
A Modified Post Encroachment Time Model of Urban Road Merging Area Based on Lane-Change Characteristics
复制标题
基于变道特性的修正城市道路合流区后侵占时间模型
DOI：
10.1109/access.2020.2987959
复制
发表时间：
2020
期刊：
影响因子：
3.9
通讯作者：
Wu Jiabin
中科院分区：
文献类型：
--
作者：
Qi Weiwei;Wang Wei;Shen Bin;Wu Jiabin
交通冲突技术（TCT）作为一种有效的方法，被广泛应用于城市道路危险区域，特别是合流区的安全评价。大多数研究者倾向于利用现实的交通数据来预测冲突的数量。如何准确地预测合流区交通冲突评价指标，目前研究较少。尽管一些相关研究已经意识到这一困境，但重要的换道特征通常被忽略，值得投入大量精力。因此，本研究提出一个修正的后侵入时间（PET）模型，以计算出车道变化的特点，以及准确地预测交通安全的合并区。与传统的碰撞时间（TTC）模型和PET模型不同，该模型不仅充分考虑了并线车辆的换道特性，而且对换道过程中的安全性要求进行了详细探讨。并根据合并行为的轨迹和速度公式，逐步推导出修正PET模型的计算公式。此外，为了追求较高的有效性，本文还特别采用了PET的两个关键组分，并最终给出了统一的计算公式。为了确定一个合适的阈值，在广州广园路收集的交通冲突数据进行了分析。结果清楚地证明，PET < 0.7表示严重冲突，0.7≤ PET < 1.31表示一般冲突，1.31≤ PET < 2.25表示轻微冲突，PET ≥2.25表示潜在冲突。最后，收集了50组PET数据和对比实验，证明了改进的PET模型的有效性和可靠性。
As an effective method, Traffic Conflict Technology (TCT) is widely applied to estimate the safety level of some risky areas, especially for the merging areas in the urban roads. Most of researchers prefer to just exploit the promising safety assessment models using realistic traffic data to predict the numbers of conflicts. There are a few types of research focusing on how to predict traffic conflict assessment indexes precisely in merging areas. Despite some related studies have realized this critical dilemma, significant lane-change characteristics are usually ignored and it is worthwhile devoting much effort to this. Hence, a modified Post Encroachment Time (PET) model is proposed in this study, to figure out lane-change characteristics as well as accurately forecast traffic safety of the merging area. Unlike other conventional methods, such as Time to Collision (TTC) or PET models, the proposed model not only fully takes the lane-change characteristics of merging vehicles into consideration, but also it explores the safety requirements in the process of lane changing in details. Moreover, the calculation formula of the modified PET model is gradually deduced by the trajectory of merging behavior and velocity formula. Besides, for the sake of pursuing a high validity, this paper exceptionally adopts two crucial compositions of PET, and eventually gives a unified calculation formula. In order to determine an appropriate threshold, traffic conflict data collected from Guangyuan Road in Guangzhou are analyzed. The results clearly prove that PET < 0.7 means a serious conflict, 0.7≤ PET < 1.31 means a general conflict, 1.31≤ PET < 2.25 means a slight conflict, and PET ≥2.25 means a potential conflict. Finally, 50 groups of PET data and a comparative experiment are collected to demonstrate the effectiveness and reliability of the modified PET model.
登录
查看更多内容
DOI：
10.1016/j.sbspro.2011.04.439
发表时间：
2011
期刊：
Procedia - Social and Behavioral Sciences
影响因子：
--
作者：
G. Louah;D. Daucher;Patricia Conde-Cespedes;Frédéric Bosc;J. Lhuillier
通讯作者：
G. Louah;D. Daucher;Patricia Conde-Cespedes;Frédéric Bosc;J. Lhuillier
影响因子：
3.9
作者：
Huimin Ge;Ran Xia;Hui Sun;Yousen Yang;Mingyue Huang
通讯作者：
Huimin Ge;Ran Xia;Hui Sun;Yousen Yang;Mingyue Huang
影响因子：
8.3
作者：
D. Eustace;Aline Aylo;Worku Y. Mergia
通讯作者：
D. Eustace;Aline Aylo;Worku Y. Mergia
DOI：
--
发表时间：
1989
期刊：
--
影响因子：
--
作者：
M. Parker;C. Zegeer
通讯作者：
M. Parker;C. Zegeer
DOI：
10.1016/j.sbspro.2013.08.227
发表时间：
2013-11
期刊：
Procedia - Social and Behavioral Sciences
影响因子：
--
作者：
Hang Zhang;Zhibin Li;Pan Liu;Chengcheng Xu;Hao Yu
通讯作者：
Hang Zhang;Zhibin Li;Pan Liu;Chengcheng Xu;Hao Yu