Europhys. Lett.
Volume 65, Number 2, January 2004
Page(s) 283 - 289
Section Interdisciplinary physics and related areas of science and technology
Published online 01 January 2004
Europhys. Lett., 65 (2) , pp. 283-289 (2004)
DOI: 10.1209/epl/i2003-10083-5

Adaptive drivers in a model of urban traffic

A. De Martino1, M. Marsili2 and R. Mulet3

1  INFM-SMC and Dipartimento di Fisica, Università di Roma "La Sapienza" p.le A. Moro 2, 00185 Roma, Italy
2  The Abdus Salam ICTP - Strada Costiera 14, 34014 Trieste, Italy
3  Henri Poincaré Chair of Complex Systems and Superconductivity Laboratory Physics Faculty and IMRE, Universidad de la Habana - CP 10400, La Habana, Cuba

(Received 26 August 2003; accepted in final form 5 November 2003)

We introduce a simple lattice model of traffic flow in a city where drivers optimize their route selection in time in order to avoid traffic jams, and study its phase structure as a function of the density of vehicles and of the drivers' behavioral parameters via numerical simulations and mean-field analytical arguments. We identify a phase transition between a low- and a high-density regime. In the latter, inductive drivers may surprisingly behave worse than randomly selecting drivers.

87.23.Ge - Dynamics of social systems.
05.65.+b - Self-organized systems.

© EDP Sciences 2004