Crash modification factors for high friction surface treatment on horizontal curves of two-lane highways: A combined propensity scores matching and empirical Bayes before-after approach

Horizontal curves are locations that, as a result of the changing alignment, may be a contributing factor in roadway departure crashes. One low-cost countermeasure to mitigate crashes at these locations is the installation of the high friction surface treatment (HFST), which increases roadway friction and is intended to help keep drivers on the roadway when traversing a horizontal curve. This treatment has been implemented at numerous curves in Pennsylvania, but the overall safety effectiveness is not known. The purpose of this study is to estimate a suite of Crash Modification Factors (CMFs) for HFST applied to curve sections of undivided two-lane roadways. A novel combination of the empirical Bayes observational before-after study design and propensity score matching was used to estimate CMFs for multiple crash types, crash severities, and roadway settings (urban and rural). Propensity score matching was implemented to identify the most appropriate reference group to use within the empirical Bayes methodology. The results indicate that the installation of HFST is associated with a statistically significant decrease in all crash types and severities considered.

• Record URL:
  • https://doi.org/10.1016/j.aap.2024.107536
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0001457524000812
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00014575
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights reserved. Abstract reprinted with permission of Elsevier.
• Authors:
  • Gayah, Vikash V
  • Donnell, Eric T
  • Zhang, Pengxiang
  • 0000-0002-5344-0283
• Publication Date: 2024-5-1

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 107536
• Serial:
  • Accident Analysis & Prevention
  • Volume: 199
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0001-4575
  • Serial URL: http://www.sciencedirect.com/science/journal/00014575

Subject/Index Terms

• TRT Terms: Crash modification factors; Friction course; Highway curves; Highway factors in crashes; Ran off road crashes; Surface treating
• Geographic Terms: Pennsylvania
• Subject Areas: Highways; Operations and Traffic Management; Pavements; Safety and Human Factors;

Filing Info

• Accession Number: 01913857
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 4 2024 4:58PM