Modeling Two-Lane Highway Passing-Related Crashes Using Mixed Ordinal Probit Regression
Publication: Journal of Transportation Engineering, Part A: Systems
Volume 146, Issue 9
Abstract
One of the crucial areas in road safety is that of passing-related crashes on two-lane highways. Studies have shown that passing-related crashes that occurred due to inadequate passing sight distances were uncommon, indicating that the Manual on Uniform Traffic Control Devices constitutes safe designs. However, a proportion of such crashes were severe. Past research was conducted to assess passing sight distances and passing maneuvers. Yet, modeling passing-related crashes by type while considering unobserved heterogeneities, particularly of data that could not be collected such as driver aggressiveness, was not implemented. In this research, the severities of single- and multiple-vehicle passing-related crashes on two-lane highways were modeled using the mixed ordinal probit structure. As per the results of this research, insights were attained regarding the impacts of loss-of-control single-vehicle crashes, rollover single-vehicle crashes, single-motorcycle crashes, weather conditions, opposite-direction multiple-vehicle crashes, multiple-vehicle crashes involving motorcycles, high traffic volumes, and seatbelt use on the risk of sustaining severe injuries. Finally, passing-related crash countermeasures were suggested.
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Data Availability Statement
Some or all data, models, or code used during the study were provided by a third party. That is, the CARE package data were provided by WYDOT. Direct requests for these materials may be made to the provider as indicated in the Acknowledgments.
Acknowledgments
The authors would like to acknowledge that this work was part of project #RS02219, funded by WYDOT. In addition, the Federal Highway Administration provided matching funds for this study through the Mountain-Plains Consortium (MPC), Grant No. 69A3551747108 (FAST Act). The subject matter and all figures, tables, and equations not previously copyrighted by outside sources are copyrighted by WYDOT, the State of Wyoming, MPC, and the University of Wyoming. © 2020, all rights reserved,.
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Published In
Journal of Transportation Engineering, Part A: Systems
Volume 146 • Issue 9 • September 2020
Copyright
©2020 American Society of Civil Engineers.
History
Received: May 23, 2019
Accepted: May 5, 2020
Published online: Jun 30, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 30, 2020
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