Computational precision of traffic equilibria sensitivities in automatic network design and road pricing

Hillel Bar-Gera, Fredrik Hellman, Michael Patriksson

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Recent studies demonstrate the importance of computational precision of user equilibrium traffic assignment solutions for scenario comparisons. When traffic assignment is hierarchically embedded in a model for network design and/or road pricing, not only the precision of the solution itself becomes more important, but also the precision of its derivatives with respect to the design parameters should be considered.The main purpose of this paper is to present a method for precise computations of equilibrium derivatives. Numerical experiments are used for two evaluations: (1) precision of computed equilibrium derivatives for a medium-size network (Anaheim); and (2) the impact of precise derivatives on capacity-expansion solution quality for a small network (Sioux Falls).

Original languageEnglish
Pages (from-to)485-500
Number of pages16
JournalTransportation Research Part B: Methodological
Volume57
DOIs
StatePublished - 1 Jan 2013

Keywords

  • Computational precision
  • Sensitivities
  • Traffic equilibria

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Transportation

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