Computation Model of Network Scale for Urban Rail Transit Based on Mutualism Model

Abstract

In order to compute the network scale of urban rail transit, the paper proposed a mutualist model describing the network scale, through investigating the main influencing factor of network scale-the population and the relationship between population and network. The equilibrium point of different equations was given practical meaning.calibrating the key physical quantities, the nonlinear differential equations have been solved by using Runge–Kutta. Applying the model to predict the population and network scale in main city in Hefei in 2020 and long future, compared with the traditional travel demand model and network service coverage model. The result are basically accordant, so the new model is feasible.The theory model provides a new means of quantitative analysis method for urban rail transit network planning, So it has important theoretical and practical significance.

Optimal Urban Transit Investment Model and Its Application

“…Saidi et al [40] developed an analytical model aimed at identifying the optimal number of radial and ring lines in a city. Zhao et al [41] developed a model that examined the scale of urban rail networks given the population. Lee and Vuchic [42] developed an iterative model to plan the optimal transit network, with variable transit demand and under a given fixed total demand.…”