 There is interest in the study of this phenomenon since the same may happen in computer networks as well as traffic networks.Increasing the size of the network is characterized by behaviors of users similar to that of travelers on transportation networks, who act independently and in a decentralized manner in choosing optimal routes between origin and destination is an extension of the induced demand theory and consistent with Downs' 1992 theory of "triple convergence", formulated to explain the difficulty of removing peak congestion from highways.In response to a capacity addition three immediate effects occur