Incorporating Reliability Performance Measures in Operations and Planning Modeling Tools

This project explored how to address reliability using micro- and mesosimulation models. In addition, it provided guidance on how to address reliability in other modeling systems, namely in traditional demand forecasting models and with activity-based models coupled with dynamic traffic assignment models. Substantial advances were made in this project, both conceptually and in terms of practical products produced. The project focused considerable attention on how micro- and mesosimulation models could address travel time reliability. The essence of the approach is to sandwich a simulation model between a pre- and post-processor such that together, all three components can portray travel time reliability on a network or part of it. The researchers developed two software prototypes that were tested with both a widely used mesosimulation model and a widely used microsimulation model. The first software prototype, the Scenario Manager, consisted of the pre-processor for either type of simulation model. The Scenario Manager produces random scenarios involving various sources of nonrecurring congestion such as traffic incidents, weather, and work zones. It can also address scenarios based on historical data or scenarios previously constructed for planning purposes. The other software prototype is the Trajectory Processor. This post-processor determines the distribution of travel time for every origin-destination pair on a network. Nearly all the travel time reliability metrics, including standard deviation and the Planning Time Index, can be derived from the travel time distribution. This report provides more information about the Scenario Manager and the Trajectory Processor, as well as the project research.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: 145p
  • Serial:
    • SHRP 2 Report
    • Issue Number: S2-L04-RR-1
    • Publisher: Transportation Research Board

Subject/Index Terms

Filing Info

  • Accession Number: 01527183
  • Record Type: Publication
  • ISBN: 9780309273770
  • Report/Paper Numbers: SHRP 2 Report S2-L04-RR-1
  • Files: TRIS, TRB, ATRI
  • Created Date: Jun 2 2014 11:24AM