Issue
EPL
Volume 88, Number 2, October 2009
Article Number 20010
Number of page(s) 5
Section General
DOI http://dx.doi.org/10.1209/0295-5075/88/20010
Published online 06 November 2009
EPL, 88 (2009) 20010
DOI: 10.1209/0295-5075/88/20010

Global and local information in traffic congestion

G. Petri1, 2, H. Jeldtoft Jensen2, 3 and J. W. Polak1

1   Centre for Transport Studies, Department of Civil and Environmental Engineering, Imperial College London South Kensington Campus, London SW7 2AZ, UK, EU
2   Institute for Mathematical Sciences, Imperial College London - 53 Princes Gate, London SW7 2PG, UK, EU
3   Department of Mathematics, Imperial College London - South Kensington Campus, London SW7 2AZ, UK, EU

h.jensen@imperial.ac.uk

received 15 June 2009; accepted in final form 6 October 2009; published October 2009
published online 6 November 2009

Abstract
A generic network flow model of transport (of relevance to information transport as well as physical transport) is studied under two different control protocols. The first involves information concerning the global state of the network, the second only information about nodes' nearest neighbors. The global protocol allows for a larger external drive before jamming sets in, at the price of significant larger flow fluctuations. By triggering jams in neighboring nodes, the jamming perturbation grows as a pulsating core. This feature explains the different results for the two information protocols.

PACS
05.60.-k - Transport processes.
64.60.aq - Networks.
05.45.-a - Nonlinear dynamics and chaos.

© EPLA 2009