Analysis Tool for Design Treatments to Address Nonrecurrent Congestion: Annotated Graphical User’s Guide Version 2

The Strategic Highway Research Program 2 (SHRP 2) Project L07 Analysis Tool is designed to analyze the effects of highway geometric design treatments on nonrecurrent congestion using a reliability framework. The tool is a VBA interface (shown below) overlaying a Microsoft-based Excel spreadsheet (Excel 2007 and above). The tool is designed to analyze a generally homogenous segment of a freeway (typically between successive interchanges). The tool allows the user to input data regarding site geometry, traffic demand, incident history, weather, special events, and work zones. Based on these data, the tool calculates base reliability conditions. The user can then analyze the effectiveness of a variety of treatments by providing fairly simple input data regarding the treatment effects and cost parameters. As outputs, the tool predicts cumulative travel time index (TTI) curves for each hour of the day, from which other reliability variables are computed and displayed. The tool also calculates cost-effectiveness by assigning monetary values to delay and reliability improvements and comparing these benefits to expected cost over the life of each treatment. This guide is intended to assist users of the analysis tool. This user guide is pictorial and annotated. It displays most of the entry screens presented to the user by the tool, with descriptions of their respective meanings and usage.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures;
  • Pagination: 28p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01527136
  • Record Type: Publication
  • Report/Paper Numbers: SHRP 2 Reliability Project L07
  • Files: TRIS, TRB, ATRI
  • Created Date: May 23 2014 9:53AM