Safety evaluation of intersections with dynamic use of exit-lanes for left-turn using field data
Safety evaluation of intersections with dynamic use of exit-lanes for left-turn using field data
复制标题
使用现场数据动态使用左转出口车道的交叉口安全评估
DOI：
10.1016/j.aap.2017.02.023
复制
发表时间：
2017-05-01
影响因子：
5.9
通讯作者：
Liu, Yue
中科院分区：
文献类型：
--
作者：
Zhao, Jing;Liu, Yue
作为一种新提出的非常规交叉口设计，左侧交叉口出口车道能够有效地提高交叉口通行能力，并具有较高的应用灵活性，特别是在左侧交通流量较大的情况下。然而，在EFL实施之前，当局最关心的是其运行安全性。本文利用在中国7个地点收集的现场数据，通过研究左转弯机动行为来评估EFL交叉口的安全性。共缴获22830辆左转车辆，其中9793辆使用混合用途区左转。讨论了车辆闯红灯、迎面碰撞、被困车辆、追尾碰撞等4个潜在安全问题。对EFL交叉口与传统交叉口的安全风险进行了统计分析。结果表明，EFL交叉口的安全问题主要表现在信号前红灯违章率较高（高出1.83%），高峰时段违章率高达11.07%，混合使用区行车速度较低（高出18.75%）。然而，这种风险可以通过提供更多的指导信息、安装摄像头来调查和惩罚违规行为、分别调整布局设计和信号配时的设计参数值来抵消。(C) 2017 Elsevier Ltd.版权所有。
As a newly proposed unconventional intersection design, the exit-lanes for left-turn (EFL) intersection is found to be effective in increasing the intersection capacity with high level of application flexibility, especially under heavy left-turn traffic conditions. However, the operational safety of EFL is of most concern to the authority prior to its implementation. This paper evaluates the safety of the EFL intersections by studying the behavior of left-turn maneuvers using field data collected at 7 locations in China. A total of 22830 left-turn vehicles were captured, in which 9793 vehicles turned left using the mixed-usage area. Four potential safety problems, including the red-light violations, head-on collision risks, trapped vehicles, and rear-end crash risks, were discussed. Statistical analyses were carried out to compare the safety risk between the EFL intersection and the conventional one. Results indicate that the safety problems of EFL intersections mainly lie in higher percentages in red-light violations at the pre-signal (1.83% higher), wrong-way violation problems during the peak hours (the violation rate reaches up to 11.07%), and the lower travel speeds in the mixed-usage area (18.75% lower). Such risks can be counteracted, however, by providing more guiding information, installing cameras to investigate and punish violation maneuvers, and adjusting design parameter values for layout design and signal timing, respectively. (C) 2017 Elsevier Ltd. All rights reserved.