Safety Assessment of Installing Traffic Signals at High-Speed Expressway Intersections

This paper reports the status and preliminary results of an ongoing study investigating the safety benefit of signalizing intersections of high-speed (50 mph and greater) divided expressways. Before and after analysis was conducted and compared to empirical Bayesian (EB) techniques. A safety performance function was developed using negative binomial regression for a control group of 67 non-signalized intersections and compared to the performance of 20 intersections signalized between 1994 and 2001. Cross-sectional analysis was performed on 67 signalized and 67 non-signalized locations using negative binomial regression analysis to control for traffic volume. The paper reports on the effect of signalization on crash frequency and compares the results of the EB method with traditional statistical techniques.

• Record URL:
  • http://www.ctre.iastate.edu/pubs/midcon2005/index.htm
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780965231084
• Corporate Authors:

  Iowa State University, Ames

  Center for Transportation Research and Education
  2711 South Loop Drive, Suite 4700
  Ames, IA  United States  50010-8664
• Authors:
  • Knox, Todd J
  • Souleyrette, Reginald R
• Conference:
  • The 2005 Mid-Continent Transportation Research Symposium
  • Location: Ames Iowa, United States
  • Date: 2005-8-18 to 2005-8-19
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: Figures;
• Pagination: 10p
• Monograph Title: Proceedings of the 2005 Mid-Continent Transportation Research Symposium

Subject/Index Terms

• TRT Terms: Bayes' theorem; Divided highways; Empirical methods; Expressways; High speed ground transportation; Highway safety; Intersections; Regression analysis; Safety; Signalized intersections; Traffic signals
• Subject Areas: Data and Information Technology; Highways; Railroads; Safety and Human Factors; I85: Safety Devices used in Transport Infrastructure;

Filing Info

• Accession Number: 01004291
• Record Type: Publication
• ISBN: 9780965231084
• Files: TRIS
• Created Date: Sep 30 2005 8:12AM