network equilibrium

Decomposition methods based on projected gradient for network equilibrium problems

  • Andrea Cassioli
  • David Di Lorenzo
  • Marco Sciandrone
    • Categories Constrained Nonlinear Optimization, Convex Optimization, Transportation Tags , , , ,

    In this work we consider the symmetric network equilibrium problem formulated as convex minimization problem whose variables are the path flows. In order to take into account the difficulties related to the large dimension of real network problems we adopt a column generation strategy and we employ a gradient projection method within an inexact decomposition … Read more

    Preferences for Travel Time under Risk and Ambiguity: Implications in Path Selection and Network Equilibrium

  • Qi Jin
  • Defeng Sun
  • Xiao-Ming Yuan
  • Melvyn Sim
    • Categories Transportation Tags , , , ,

    In this paper, we study the preferences for uncertain travel time in which the probability distribution may not be fully characterized. In evaluating an uncertain travel time, we explicitly distinguish between risk, where probability distribution is precisely known, and ambiguity, where it is not. In particular, we propose a new criterion called ambiguity-aware CARA travel … Read more