Steady state solutions of hydrodynamic traffic models

Details Steady state solutions of hydrodynamic traffic models Steady state solutions of hydrodynamic traffic models

2004-04-14

arxiv.org/abs/cond-mat/0404314v1

Phys. Rev. E 69, 016118 (2004)

Physics

Condensed Matter

Statistical Mechanics

9 pages, 6 figures

Scientific paper

10.1103/PhysRevE.69.016118

We investigate steady state solutions of hydrodynamic traffic models in the absence of any intrinsic inhomogeneity on roads such as on-ramps. It is shown that typical hydrodynamic models possess seven different types of inhomogeneous steady state solutions. The seven solutions include those that have been reported previously only for microscopic models. The characteristic properties of wide jam such as moving velocity of its spatiotemporal pattern and/or out-flux from wide jam are shown to be uniquely determined and thus independent of initial conditions of dynamic evolution. Topological considerations suggest that all of the solutions should be common to a wide class of traffic models. The results are discussed in connection with the universality conjecture for traffic models. Also the prevalence of the limit-cycle solution in a recent study of a microscopic model is explained in this approach.

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