Deployment and Field Testing of a Method for Finding Consistent Multi-Class Link and Route Flows

The proposed work will center around two activities: (1) Deployment of Bar-Gera's Traffic Assignment by Paired Alternative Segments (TAPAS) algorithm. TAPAS will be deployed to several practitioners, who have agreed to apply it together with their current travel forecasting models. In each application, the participating practitioner will determine, with the help of the project team, how the multi-class link flows and route flows generated by TAPAS compare with those found by their vendor-supplied software systems. The team will develop specialized tools to interface the input-output functionality between TAPAS and the target applications. Given the limited amount of time, however such tools will be intended only to facilitate the specified comparison, rather than to serve the general applications of this type. (2) Comparison of results between existing alternative methods. Practitioners often use more than one method to solve nearly equivalent models. These could be: a) methods offered in different software packages; b) methods offered in different versions by the same vendor; c) options offered within the same package, designed to affect convergence; d) or simplified versions of sophisticated models (single-class vs. multi-class). Consistent total link flows and the results of analyses that are based on route flows.


    • English


    • Status: Active
    • Contract Numbers:

      DTFH61-08-H-00032 Ta

    • Sponsor Organizations:

      Federal Highway Administration

      Office of Planning, Environment and Realty (HEP)
      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Project Managers:

      Sun, Sarah

    • Performing Organizations:

      Northwestern University, Evanston

      Transportation Center, 600 Foster Street
      Evanston, IL  United States  60208-4055
    • Principal Investigators:

      Ross, Susan

    • Start Date: 20080910
    • Expected Completion Date: 0
    • Actual Completion Date: 20090908
    • Source Data: RiP Project 20313

    Subject/Index Terms

    Filing Info

    • Accession Number: 01459701
    • Record Type: Research project
    • Source Agency: Federal Highway Administration
    • Contract Numbers: DTFH61-08-H-00032 Ta
    • Files: RiP, USDOT
    • Created Date: Jan 3 2013 1:10PM