Prioritizing Safety Projects with Confidence Using Two-Step Spatial Screening

Being able to pinpoint locations on the roadway network that have abnormally high frequency of severe crashes is the first step in developing a strategic plan that ensures high returns on safety investments. This paper presents a refined two-step spatial screening method that can quickly narrow down statewide crash data into a few 0.25 -square-mile areas that have the highest crash frequencies or cost for a selected type crash. The locations identified after the 2-step process are small and specific enough to afford detailed crash causation analysis. The process is simple and intuitive and quickly reveals the spatial trends of the crashes. This paper illustrates the methodology using statewide crash data from Washington, with examples of identifying high value locations in total crashes, rural area crashes, crash costs, and crashes involving teenager drivers.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 329-340
  • Monograph Title: International Conference on Transportation and Development 2016: Projects and Practices for Prosperity

Subject/Index Terms

Filing Info

  • Accession Number: 01606309
  • Record Type: Publication
  • ISBN: 9780784479926
  • Files: TRIS, ASCE
  • Created Date: Jun 20 2016 3:03PM