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F → S → F Transitions in Vehicle Probe Data

  • Sven-Eric MolzahnEmail author
  • Boris S. Kerner
  • Hubert Rehborn
  • Sergey L. Klenov
  • Micha Koller
Conference paper

Abstract

Based on a study of probe vehicle data we have revealed empirical F→S→F transitions before traffic breakdown at the bottleneck theoretically predicted by Kerner. Anonymized probe data from connected vehicles of a large fleet have been collected. The frequency of connected vehicles in our study has been more than ten times larger (on average about 10 s between probe vehicles) than in earlier studies. This data shows that disturbances in free flow evolve in a neighbourhood of the bottleneck leading to small regions of synchronized flow (F→S transition). These regions of synchronized flow dissolve after a random amount of time (traffic recovers to free flow (S→F transition)) before the traffic breakdown occurs. In contrast with the F→S→F transitions, traffic breakdown leads to a long-living congested traffic pattern propagating upstream of the bottleneck. The empirical findings of this paper support some of the theoretical features of the S→F instability.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Sven-Eric Molzahn
    • 1
    Email author
  • Boris S. Kerner
    • 2
  • Hubert Rehborn
    • 1
  • Sergey L. Klenov
    • 3
  • Micha Koller
    • 1
  1. 1.Daimler AG, RD/USN, HPC 059-X901SindelfingenGermany
  2. 2.Physics of Transport and TrafficDuisburgGermany
  3. 3.Moscow Institute of Physics and TechnologyMoscowRussia

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