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    • College of Engineering, University of Wisconsin--Madison
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    • Wisconsin Transportation Center
    • Midwest Regional University Transportation Center
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    A regional traffic simulation/assignment model for evaluation of transit performance and asset utilization: time dependent multimodal and intermodal assignment models

    Thumbnail
    File(s)
    Final report (3.210Mb)
    Date
    2004-02
    Author
    Chang, Elaine
    Ziliaskopoulos, Anthanasios
    Publisher
    Midwest Regional University Transportation Center
    Metadata
    Show full item record
    Abstract
    This report presents three approaches to modeling multimodal and intermodal transportation network problems for evaluation of transit performance and asset management. The first approach is an automobile assignment-based multimodal approach, which captures bus movements in the simulator, but assigns only automobile trips to shortest paths under the assumption that the mode split is fixed. For this model, an inner assignment dynamic user equilibrium (IADUE) assignment algorithm was developed to replace the method of successive averages (MSA). Whereas the MSA approach, which has been the state of the art in simulation-based assignment models, assigns vehicles to paths probabilistically, the IADUE approach systematically searches for the equilibrium assignment. Next, a person assignment-based intermodal approach is presented such that mode and path choices are modeled as simultaneous decisions. This approach uses the same multimodal car and bus simulator as in the vehicle assignment approach, and also uses the IADUE algorithm to determine the equilibrium path assignment; however, instead of automobile-only shortest paths, intermodal least cost paths are calculated at each iteration. Third, an integer linear programming formulation of the system optimal intermodal assignment model is presented. Computational results are presented for all three models.
    Subject
    Algorithms
    Intermodal transportation
    Dynamic traffic assignment
    Bus transit
    Asset management
    Traffic simulation
    Traffic equilibrium
    Traffic flow
    Permanent Link
    http://digital.library.wisc.edu/1793/53523
    Type
    Technical Report
    Description
    136 p.
    Part of
    • Midwest Regional University Transportation Center

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