Safety Analysis of Interchanges

The objectives of this research are to synthesize the current state of knowledge concerning the safety assessment of new or modified interchanges; develop a spreadsheet-based computational tool for performing safety assessments of interchanges; and identify gaps in knowledge concerning interchange safety assessment and future research needs to fill those gaps. This report summarizes the capabilities of the spreadsheet-based Interchange Safety Analysis Tool (ISAT), summarizes safety data related to interchanges, summarizes safety literature related to interchanges, presents results of telephone interviews with key stakeholders to investigate their needs and requirements in safety evaluations of interchanges, and identifies substantive gaps in the current state of knowledge that limit the ability of ISAT to provide all of the capabilities desired by potential users and provides a brief summary of the needed research to address these gaps. This report also contains the detailed algorithms utilized in the calculations of the ISAT program. The other primary deliverables of this research are (1) the spreadsheet-based analytical tool (i.e., ISAT) and (2) an accompanying user manual (FHWA-HRT-07-045) which provides detailed descriptions/instructions on the usage and operation of ISAT.

  • Record URL:
  • Corporate Authors:

    Midwest Research Institute

    425 Volker Boulevard
    Kansas City, MO  United States  64110-2299

    Federal Highway Administration

    Office of Safety Research and Development
    6300 Georgetown Pike
    McLean, VA  United States  22101-2296
  • Authors:
    • Torbic, D J
    • Harwood, D W
    • Gilmore, D K
    • Richard, K R
  • Publication Date: 2007-6


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 172p

Subject/Index Terms

Filing Info

  • Accession Number: 01710371
  • Record Type: Publication
  • Report/Paper Numbers: Report No. 110448
  • Contract Numbers: DTFH61-05-P-00302
  • Created Date: Jun 17 2019 10:43AM