The Kasteleyn model and a cellular automaton approach to traffic flow

Details The Kasteleyn model and a cellular automaton approach to traffic flow The Kasteleyn model and a cellular automaton approach to traffic flow

1995-12-08

arxiv.org/abs/cond-mat/9512062v2

Physics

Condensed Matter

Latex, 13 pages including 3 ps-figures

Scientific paper

10.1088/0305-4470/29/10/002

We propose a bridge between the theory of exactly solvable models and the investigation of traffic flow. By choosing the activities in an apropriate way the dimer configurations of the Kasteleyn model on a hexagonal lattice can be interpreted as space-time trajectories of cars. This then allows for a calculation of the flow-density relationship (fundamental diagram). We further introduce a closely-related cellular automaton model. This model can be viewed as a variant of the Nagel-Schreckenberg model in which the cars do not have a velocity memory. It is also exactly solvable and the fundamental diagram is calculated.

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