Self-organization in BML Traffic Flow Model: Analytical Approaches

Details Self-organization in BML Traffic Flow Model: Analytical Approaches Self-organization in BML Traffic Flow Model: Analytical Approaches

1999-12-21

arxiv.org/abs/cond-mat/9912386v1

Commun. Theor. Phys. 31, 85 (1999)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 2 figures, revtex

Scientific paper

Analytical investigations are made on BML two-dimensional traffic flow model with alternative movement and exclude-volume effect. Several exact results are obtained, including the upper critical density above which there are only jamming configurations asymptotically, and the lower critical density below which there are only moving configurations asymptotically. The jamming transition observed in the ensemble average velocity takes place at another critical density $p_{c}(N)$, which is dependent on the lattice size $N$ and is in the intermediate region between the lower and upper critical densities. It is suggested that $p_{c}(N)$ is proportional to a power of $N$, in good agreement with the numerical simulation. The order parameter of this jamming transition is identified.

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