Safety Impacts of Signing Delineation for Horizontal Curves on Rural Two-Lane Roads

As part of its strategic highway safety effort, the Federal Highway Administration (FHWA) organized a pooled fund study of 26 states to evaluate low-cost safety strategies. One of the strategies chosen to be evaluated for this study was improving curve delineation. Geometric, traffic and crash data were obtained at 89 treated curves in Connecticut, USA, and 139 treated curves in Washington, USA, to determine the safety effectiveness of improved curve signing. Treatments varied by site and included new chevrons, horizontal arrows, advance warning signs, and improvement of existing signs using fluorescent yellow sheeting. All sites were on two-lane rural roads. To account for potential selection bias and regression-to-the-mean, an empirical Bayes before-after analysis was conducted.

• Supplemental Notes:
  • Abstract reprinted with permission from the publisher.
• Authors:
  • Srinivasan, Raghavan
  • Persaud, Bhagwant
  • Eccles, Kimberly
  • Carter, Daniel
  • Baek, Jongdae
• Publication Date: 2012-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 51-66
• Serial:
  • Journal of Transportation of the Institute of Transportation Engineers
  • Volume: 3
  • Issue Number: 1
  • Publisher: Institute of Transportation Engineers (ITE)
  • Serial URL: http://www.ite.org/jot/

Subject/Index Terms

• TRT Terms: Bayes' theorem; Before and after studies; Highway curves; Highway safety; Two lane highways; Warning signs
• Identifier Terms: High Risk Rural Roads Program
• Geographic Terms: Connecticut; Washington (District of Columbia)
• Subject Areas: Highways; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 01482526
• Record Type: Publication
• Files: TRIS
• Created Date: May 28 2013 9:36AM