  In this work we widespread statistical physics (chemical kinetic stochastic)
approach to the investigation of macrosystems, arise in economic, sociology and
traffic flow theory. The main line is a definition of equilibrium of
macrosystem as most probable macrostate of invariant measure of Markov dynamic
(corresponds to the macrosystem). We demonstrate new dynamical interpretations
for the well known static model of correspondence matrix calculation. Based on
this model we propose a best response dynamics for the Beckmann's traffic flow
distribution model. We prove that this "natural" dynamic under quite general
conditions converges to the Nash-Wardrop's equilibrium. After that we consider
two interesting demonstration examples.
