A model for the evolution of traffic jams in multi lane

A model for the evolution of traffic jams in multi-lane F. Berthelin & D. Broizat Laboratoire J. A. Dieudonne, UMR 6621 CNRS, Universite de Nice, Parc Valrose, 06108 Nice cedex 2, France, Email: , May 14, 2012 Abstract In [7], Berthelin, Degond, Delitala and Rascle introduced a traffic flow model describing the formation and the dynamics of traffic jams. This model consists of a Pressureless Gas Dynamics system under a maximal constraint on the density and is derived through a singular limit of the Aw-Rascle model. In the present paper we propose an improvement of this model by allowing the road to be multi-lane piecewise. The idea is to use the maximal constraint to model the number of lanes. We also add in the model a parameter ? which model the various speed limitations according to the number of lanes. We present the dynamical behaviour of clusters (traffic jams) and by approximation with such solutions, we obtain an existence result of weak solutions for any initial data. Key words: Traffic flow models, Constrained Pressureless Gas Dynamics, Multi- lane, Weak solutions, Traffic jams AMS Subject classification: 90B20, 35L60, 35L65, 35L67, 35R99, 76L05 1

• pressureless gas


• constrained pressureless


• n?


• multi- lane


• aw-rascle model


• dynamics system