Citation

Bette HM, Habel L, Emig T, Schreckenberg M. Phys. Rev. E 2017; 95(1-1): e012311.

Affiliation

Universität Duisburg-Essen, Physik von Transport und Verkehr, 47058 Duisburg, Germany.

Copyright

(Copyright © 2017, American Physical Society)

DOI

10.1103/PhysRevE.95.012311

PMID

28208435

Abstract

We study the Nagel-Schreckenberg cellular automata model for traffic flow by both simulations and analytical techniques. To better understand the nature of the jamming transition, we analyze the fraction of stopped cars P(v=0) as a function of the mean car density. We present a simple argument that yields an estimate for the free density where jamming occurs, and show satisfying agreement with simulation results. We demonstrate that the fraction of jammed cars P(v∈{0,1}) can be decomposed into the three factors (jamming rate, jam lifetime, and jam size) for which we derive, from random walk arguments, exponents that control their scaling close to the critical density.

Language: en