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Open AccessArticle

Influential Factors Associated with Consecutive Crash Severity: A Two-Level Logistic Modeling Approach

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Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518000, China
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Department of Statistics and Data Science, Southern University of Science and Technology, Shenzhen 518000, China
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Department of Civil Engineering, The University of Hong Kong, Hong Kong 999077, China
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Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, China
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Department of Architecture and Civil Engineering, Chalmers University of Technology, 41296 Göteborg, Sweden
*
Authors to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(15), 5623; https://doi.org/10.3390/ijerph17155623
Received: 30 June 2020 / Revised: 30 July 2020 / Accepted: 31 July 2020 / Published: 4 August 2020
A consecutive crash series is composed by a primary crash and one or more subsequent secondary crashes that occur immediately within a certain distance. The crash mechanism of a consecutive crash series is distinctive, as it is different from common primary and secondary crashes mainly caused by queuing effects and chain-reaction crashes that involve multiple collisions in one crash. It commonly affects a large area of road space and possibly causes congestions and significant delays in evacuation and clearance. This study identified the influential factors determining the severity of primary and secondary crashes in a consecutive crash series. Basic, random-effects, random-parameters, and two-level binary logistic regression models were established based on crash data collected on the freeway network of Guizhou Province, China in 2018, of which 349 were identified as consecutive crashes. According to the model performance metrics, the two-level logistic model outperformed the other three models. On the crash level, double-vehicle primary crash had a negative association with the severity of secondary consecutive crashes, and the involvement of trucks in the secondary consecutive crash had a positive contribution to its crash severity. On a road segment level, speed limit, traffic volume, tunnel, and extreme weather conditions such as rainy and cloudy days had positive effects on consecutive crash severity, while the number of lanes was negatively associated with consecutive crash severity. Policy suggestions are made to alleviate the severity of consecutive crashes by reminding the drivers with real-time potential hazards of severe consecutive crashes and providing educative programs to specific groups of drivers. View Full-Text
Keywords: consecutive crash; crash severity; traffic hazard; multi-level model; unobserved heterogeneity consecutive crash; crash severity; traffic hazard; multi-level model; unobserved heterogeneity
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MDPI and ACS Style

Meng, F.; Xu, P.; Song, C.; Gao, K.; Zhou, Z.; Yang, L. Influential Factors Associated with Consecutive Crash Severity: A Two-Level Logistic Modeling Approach. Int. J. Environ. Res. Public Health 2020, 17, 5623.

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