Platoon formation in a traffic model with variable anticipation

Details Platoon formation in a traffic model with variable anticipation Platoon formation in a traffic model with variable anticipation

2003-06-20

arxiv.org/abs/cond-mat/0306531v1

Physics

Condensed Matter

Statistical Mechanics

8 pages, 8 figures, some figures in color

Scientific paper

A cellular automaton model of traffic flow taking into account velocity anticipation is introduced. The strength of anticipation can be varied which allows to describe different driving schemes. We find phase separation into a free-flow regime and a so-called $v$-platoon in an intermediate density regime. In a $v$-platoon all cars move with velocity $v$ and have vanishing headway. The velocity $v$ of a platoon only depends on the strength of anticipation. At high densities, a congested state characterized by the coexistence of a 0-platoon with several $v$-platoons is reached. The results are not only relevant for automated highway systems, but also help to elucidate the effects of anticipation that play an essential role in realistic traffic models. From a physics point of view the model is interesting because it exhibits phase separation with a condensed phase in which particles move coherently with finite velocity coexisting with either a non-condensed (free-flow) phase or another condensed phase that is non-moving.

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