开发无序交通条件下城市信号灯交叉口追尾和侧擦冲突预测模型

IF 3.2 Q3 TRANSPORTATION
A. Shahana , Perumal Vedagiri
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引用次数: 0

摘要

交通冲突技术是一种前瞻性方法,可识别可能导致撞车的可观察到的关键车辆相互作用(冲突)。本文开发了基于冲突的安全性能函数 (SPF),用于预测在车道规则不佳的混合交通条件下(无序交通条件)信号周期级别的交通冲突数量。从印度 4 个信号灯路口收集的交通视频数据中提取了 9586 个车辆轨迹。使用碰撞时间(TTC)估算了关键交互车辆对。传统的代用措施被修改为二维代用方法,该方法通过纳入车辆尺寸、方向、位置、速度以及车辆间纵向和横向的加速度来捕捉冲突。根据不同的阈值来确定追尾和侧擦冲突的严重程度。后端冲突 SPF 显示,在交通流量较大、车辆到达速度较高、右转车流较多且排比较低的信号周期内,预计冲突发生率较高。在严重阈值(TTC ≤ 1 秒)下,车速每增加 1 米/秒,预计追尾冲突次数就会增加 6%。此外,SPF 显示,在有更多变道操作和右转车辆的信号周期内,预计会发生严重的侧擦冲突。在 TTC ≤ 1 秒的情况下,变道次数每增加一个单位,侧擦冲突的预期次数就会增加 7.9%。本研究的结果可用于制定政策措施和提高无序交通条件下信号交叉口的安全性,具有极大的益处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Developing rear-end and side-swipe conflict prediction models for urban signalized intersections under disordered traffic conditions

A Traffic Conflict Technique is a proactive approach that identifies observable critical vehicle interactions (conflict) that could have led to a crash. This paper develops conflict-based safety performance functions (SPFs) to predict the number of traffic conflicts at the signal cycle level in mixed traffic conditions with poor lane discipline (disordered traffic conditions). 9586 vehicle trajectories were extracted from traffic video data collected from 4 signalized intersections in India. Critically interacting vehicle pairs were estimated using Time to Collision (TTC). The conventional surrogate measure is modified into a 2-dimensional surrogate approach which captures the conflicts by incorporating the vehicle dimension, heading direction, position, speed, and acceleration in the longitudinal and lateral direction between vehicles. Rear-end and side-swipe conflicts are identified at varying threshold values to incorporate severity. Rear-end conflict SPFs show that higher conflict occurrence is expected during signal cycles with more traffic volume, higher vehicle arrival speed, more right-turning traffic, and a lower platoon ratio. At severe threshold (TTC ≤ 1 s), one 1 m/s increase in speed of vehicle increases the expected number of rear-end conflicts by 6%. Furthermore, SPFs show that severe side-swipe conflicts are expected during signal cycles with more lane-changing maneuvers and right-turning vehicles. For TTC ≤ 1 s, one unit increase in the number of lane changes would increase the expected number of sides-wipe conflicts by 7.9%. The finding of this study can be most beneficially used for arriving at policy measures and improving the safety of signalized intersections in disordered traffic conditions.

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来源期刊
IATSS Research
IATSS Research TRANSPORTATION-
CiteScore
6.40
自引率
6.20%
发文量
44
审稿时长
42 weeks
期刊介绍: First published in 1977 as an international journal sponsored by the International Association of Traffic and Safety Sciences, IATSS Research has contributed to the dissemination of interdisciplinary wisdom on ideal mobility, particularly in Asia. IATSS Research is an international refereed journal providing a platform for the exchange of scientific findings on transportation and safety across a wide range of academic fields, with particular emphasis on the links between scientific findings and practice in society and cultural contexts. IATSS Research welcomes submission of original research articles and reviews that satisfy the following conditions: 1.Relevant to transportation and safety, and the multiple impacts of transportation systems on security, human health, and the environment. 2.Contains important policy and practical implications based on scientific evidence in the applicable academic field. In addition to welcoming general submissions, IATSS Research occasionally plans and publishes special feature sections and special issues composed of invited articles addressing specific topics.
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