Impact of operating speed measures on traffic crashes: Annual and daily level models for rural two-lane and rural multilane roadways

IF 2.4 3区 工程技术 Q3 TRANSPORTATION Journal of Transportation Safety & Security Pub Date : 2022-07-15 DOI:10.1080/19439962.2022.2098441
Subasish Das, Eun Sug Park, Sobhan Sarkar
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引用次数: 2

Abstract

Abstract A significant association between crash severity and operating speed is known to exist. However, the findings related to the speed-crash association are inconclusive. Some studies found that higher speed is associated with a higher number of crashes, whereas other studies found the opposite result. Some of the critical issues in this research problem result from study design, the definition of operating speed measures, types and granularity of operating speed measures, spatial correlation, and design standards of different roadway facilities. The road safety profession will benefit greatly from informative research on the impact of vehicle operating speed, roadway design elements, and traffic volume on crash outcomes. This study investigated the speed-crash association in both annual and daily level datasets to determine how roadway characteristics interact with various speed measures to impact the likelihood of crash occurrences on both annual and daily levels. For annual models, the average operating speed is positively associated with both fatal and injury and property damage only (PDO) crashes. However, for daily models, this association is mostly negative and insignificant. The standard deviation of operating speed is positively associated with crash occurrences for both daily and annual models. The findings of this study can provide additional insights into the speed-crash association literature.
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运行速度措施对交通事故的影响:农村双车道和农村多车道道路的年度和日水平模型
摘要碰撞严重程度与运行速度之间存在显著关联。然而,与速度碰撞相关的研究结果尚无定论。一些研究发现,车速越快,撞车次数越多,而另一些研究则发现了相反的结果。本研究问题中的一些关键问题源于研究设计、运营速度措施的定义、运营速度措施的类型和粒度、空间相关性以及不同道路设施的设计标准。道路安全专业将从车辆运行速度、道路设计元素和交通量对碰撞结果的影响的信息研究中受益匪浅。本研究调查了年度和每日水平数据集的速度-碰撞关联,以确定道路特征如何与各种速度措施相互作用,从而影响年度和每日水平上发生碰撞的可能性。对于年度模型,平均运行速度与仅造成人员伤亡和财产损失(PDO)的撞车事故呈正相关。然而,对于日常模型,这种关联大多是负的,不显著的。对于每日和年度模型,运行速度的标准偏差与碰撞事件呈正相关。本研究的发现可以为速度碰撞相关文献提供额外的见解。
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来源期刊
CiteScore
6.00
自引率
15.40%
发文量
38
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