Traffic assignment is used for infrastructure planning, based on metrics like total system travel time (TSTT), vehicle-miles traveled (VMT) and link or path flows. Algorithms for traffic assignment converge to an equilibrium solution over multiple iterations, but these metrics converge at different rates. Current guidance indicates that freeway link flows stabilize at a relative gap of roughly . This study generalizes this guidance by testing additional networks and metrics, in more experimental settings. Our results reveal that aggregate metrics (VMT and TSTT) stabilize earlier (relative gap ) than link flows (relative gap ), which in turn stabilize slightly before the set of most likely used paths and flows on these paths (relative gap ). These results are stable across the TAPAS and Algorithm B methods for solving assignment. Our results also show strong linear correlations between alternative gap measures, allowing for the translation of stabilization results across other gap definitions as well.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Convergence behavior for traffic assignment characterization metrics


    Contributors:

    Published in:

    Publication date :

    2021-12-10


    Size :

    28 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown




    Factors affecting convergence and stability in simulation-based dynamic traffic assignment

    Mahut, M. / Florian, M. / Tremblay, N. et al. | British Library Conference Proceedings | 2009


    Traffic assignment

    Engineering Index Backfile | 1952


    Dynamic Traffic Assignment

    De Romph, E. | British Library Conference Proceedings | 1996


    Traffic Assignment Research

    E. R. Ruiter | NTIS | 1968


    Considering Travelers' Risk-Taking Behavior in Dynamic Traffic Assignment

    Boyce, D. E. / Ran, B. / Li, I. Y. et al. | British Library Conference Proceedings | 1998