高速公路交通事故时空影响动态效应的传播分析

杨洋, 胡嫣然, 袁振洲, 等

doi:10.12141/j.issn.1000-565X.220353

华南理工大学学报(自然科学版) >

2023 , Vol. 51 >Issue 1: 123 - 133

DOI: https://doi.org/10.12141/j.issn.1000-565X.220353

交通运输工程

高速公路交通事故时空影响动态效应的传播分析

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^1.北京航空航天大学交通科学与工程学院，北京 100191
^2.北京航空航天大学车路协同与安全控制北京市重点实验室，北京 100191
^3.北京交通大学交通运输学院，北京 100044

杨洋（1988-），男，博士，在站博士后，副研究员，主要从事道路交通安全研究。

收稿日期: 2022-06-06

网络出版日期: 2022-10-13

基金资助

国家重点研发计划项目(2020YFB1600301);中国博士后科学基金资助项目(2021M700333);北京市自然科学基金资助项目(J210001)

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Analysis on Propagation of Spatio-Temporal Dynamic Effects Towards Freeway Traffic Crash

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^1.School of Transportation Science and Engineering，Beihang University，Beijing 100191，China
^2.Beijing Key Laboratory for Cooperative Vehicle Infrastructure Systems and Safety Control，Beihang University，Beijing 100191，China
^3.School of Traffic and Transportation，Beijing Jiaotong University，Beijing 100044，China

杨洋（1988-），男，博士，在站博士后，副研究员，主要从事道路交通安全研究。

Received date: 2022-06-06

Online published: 2022-10-13

Supported by

the National Key Research and Development Plan(2020YFB1600301);the China Postdoctoral Science Foundation(2021M700333);the Beijing Natural Science Foundation(J210001)

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摘要

为探究并量化高速公路交通事故的时空传播机理，克服传统交通波理论在此类问题中考虑维度单一的缺陷，首先，基于微波雷达检测器采集的动态交通流数据，分析高速公路事故前后的速度变化态势；进而，引入速度变化率作为事故影响的度量指标，采用双线性插值法构建速度变化率轮廓图，并根据Savitzky-Golay滤波拟合法拟合事故影响时空区域的外围轮廓；最后，在速度变化率的阈值分别取20%、30%和40%时，计算并分析交通事故时空影响的各量化指标，包括事故影响开始时间、事故影响结束时间、事故影响持续时间、事故影响最近距离、事故影响最远距离、事故影响空间范围、事故影响传播速度以及事故影响消散速度。结果表明：速度变化率的阈值取值越小，则事故影响的开始时间越早，结束时间越晚，持续时间越长，且事故影响的距离越长；速度变化率阈值取值越大，则事故影响的开始时间越晚，结束时间越早，持续时间越短，且事故影响的距离越短；不同速度变化率阈值下的事故影响传播速度随时间的变化趋势有差异。文中方法操作性强、辨识度高，能够为高速公路事故发生后的实时交通管控和引导提供理论支撑。

关键词： 高速公路; 交通事故; 时空影响传播; 双线性插值法; Savitzky-Golay滤波器

本文引用格式

杨洋, 胡嫣然, 袁振洲, 等 . 高速公路交通事故时空影响动态效应的传播分析[J]. 华南理工大学学报(自然科学版), 2023 , 51(1) : 123 -133 . DOI: 10.12141/j.issn.1000-565X.220353

Abstract

This paper aims to explore and quantify the spatio-temporal propagation mechanism of freeway traffic crashes and address the defect of traditional traffic wave theory considering single dimension in such problems. Firstly, the speed changing before and after the traffic crash was analyzed based on the dynamic traffic flow data collected by microwave radar detectors. Furthermore, the speed changing rate was introduced as a measure of the impact of a crash, the bilinear interpolation method was adopted to construct the speed changing rate curve, and the Savitzky-Golay filtering fitting method was applied to fit the outer contour of the spatio-temporal region affected by the crash. Finally, the indicators of spatio-temporal impacts of traffic crash were figured out and analyzed under the condition that the speed changing rate threshold is 20%, 30% and 40%, respectively. The indicators include the beginning time of the crash effect, the end time of the crash effect, the duration of the crash effect, the closest distance of the crash effect, the furthest distance of the crash effect, the spatial range of the crash effect, the propagation speed of the crash effect and the dissipation speed of crash effect. The results indicate that the smaller the threshold of speed changing rate is, the earlier the crash influence starts, the later the crash influence ends, the longer the duration and the longer the distance of the crash influence has; the higher the speed changing rate threshold is, the later the crash influence starts, the earlier the crash influence ends, the shorter the duration and the shorter the distance of the crash influence have; additionally, under various speed changing rate threshold, the changing trend of propagation speed generated by the traffic crash varies with time. The approach adopted in this paper has strong operability and high identification of results, which can provide theoretical support for real-time traffic control and guidance after freeway crashes.

Key words： freeway; traffic crash; spatio-temporal influence propagation; bilinear interpolation method; Savitzky-Golay filter

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