Online Computation of Fastest Path in Time-Dependent Spatial Networks

  • Ugur Demiryurek
  • Farnoush Banaei-Kashani
  • Cyrus Shahabi
  • Anand Ranganathan
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6849)

Abstract

The problem of point-to-point fastest path computation in static spatial networks is extensively studied with many precomputation techniques proposed to speed-up the computation. Most of the existing approaches make the simplifying assumption that travel-times of the network edges are constant. However, with real-world spatial networks the edge travel-times are time-dependent, where the arrival-time to an edge determines the actual travel-time on the edge. In this paper, we study the online computation of fastest path in time-dependent spatial networks and present a technique which speeds-up the path computation. We show that our fastest path computation based on a bidirectional time-dependent A* search significantly improves the computation time and storage complexity. With extensive experiments using real data-sets (including a variety of large spatial networks with real traffic data) we demonstrate the efficacy of our proposed techniques for online fastest path computation.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Ugur Demiryurek
    • 1
  • Farnoush Banaei-Kashani
    • 1
  • Cyrus Shahabi
    • 1
  • Anand Ranganathan
    • 2
  1. 1.Department of Computer ScienceUniversity of Southern CaliforniaLos AngelesUSA
  2. 2.IBM T.J. Watson Research CenterHawthorneUSA

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