The Open Transportation Journal




ISSN: 1874-4478 ― Volume 13, 2019
REVIEW ARTICLE

Application of Multinomial Regression Model to Identify Parameters Impacting Traffic Barrier Crash Severity



Mahdi Rezapour, Amirarsalan Mehrara Molan*, Khaled Ksaibati
Wyoming Technology Transfer Center, Department of Civil & Architectural Engineering, University of Wyoming, Laramie, Wyoming, USA

Abstract

Background:

Run Off The Road (ROTR) crashes are some of the most severe crashes that could occur on roadways. The main countermeasure that can be taken to address this type of crashe is traffic barrier installation. Although ROTR crashes can be mitigated significantly by traffic barriers, still traffic barrier crashes resulted in considerable amount of severe crashes. Besides, the types of traffic barriers, driver actions and performance play an important role in the severity of these crashes.

Methods:

This study was conducted by incorporating only traffic barrier crashes in Wyoming. Based on the literature review there are unique contributory factors in different crash types. Therefore, in addition to focusing on traffic barrier crashes, crashes were divided into two different highway classes: interstate and non-interstate highways.

Results:

The result of proportional odds assumption was an indication that multinomial logistic regression model is appropriate for both non-interstate and interstates crashes involved with traffic barriers. The results indicated that road surface conditions, age, driver restraint and negotiating a curve were some of the factors that impact the severity of traffic barrier crashes on non-interstate highways. On the other hand, the results of interstate barrier crashes indicated that besides types of barriers, driver condition, citation record, speed limit compliance were some of the factors that impacted the interstate traffic barrier crash severity.

Conclusion:

The results of this study would provide the policymakers with the directions to take appropriate countermeasures to alleviate the severity of traffic barrier crashes.

Keywords: Barrier crashes, Traffic barrier, Crash severity, Multinomial logistic regression, ROTR, Roadways.


Article Information


Identifiers and Pagination:

Year: 2019
Volume: 13
First Page: 57
Last Page: 64
Publisher Id: TOTJ-13-57
DOI: 10.2174/1874447801913010057

Article History:

Received Date: 02/2/2019
Revision Received Date: 11/04/2019
Acceptance Date: 24/04/2019
Electronic publication date: 31/05/2019
Collection year: 2019

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© 2019 Rezapour et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: (https://creativecommons.org/licenses/by/4.0/legalcode). This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


* Address correspondence to this author at the Department of Civil & Architectural Engineering University of Wyoming Office: EN 3084 1000 E University Ave, Dept. 3295 Laramie; Tel: (307)766-5550;
Email: amehrara@uwyo.edu




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