Phase Diagram of Traffic States in the Presence of Inhomogeneities

Details Phase Diagram of Traffic States in the Presence of Inhomogeneities Phase Diagram of Traffic States in the Presence of Inhomogeneities

1998-09-24

arxiv.org/abs/cond-mat/9809324v2

Physical Review Letters 82, 4360-4363 (1999)

Physics

Condensed Matter

Statistical Mechanics

For related work see http://www.theo2.physik.uni-stuttgart.de/helbing.html and http://www.theo2.physik.uni-stuttgart.de/trei

Scientific paper

10.1103/PhysRevLett.82.4360

We present a phase diagram of the different kinds of congested traffic that are triggered by disturbances when passing ramps or other spatial inhomogeneities of a freeway. The simulation results obtained by the nonlocal, gas-kinetic-based traffic model are in good agreement with empirical findigs. They allow to understand the observed trasitions between free and various kinds of congested traffic, among them localized clusters, stop-and-go waves, and different types of ``synchronized'' traffic. The proposed conditions for the existence of these states suggest that the phase diagram is universal for a class of different microscopic and macroscopic traffic models.

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