On Distributary Model of Public Transportation in Metropolis

摘要

The expansion of population and the worsening of the city development pattern brought serious effects on public transportation in the metropolis. The traditional method is not suitable for the analysis of city public transportation. This paper presents the model of "frog-jumping and permeation" of passage flow in city public transportation. In this model, the passages between the first-class gradient centers are trans- ported by the fastest ways, and transferred in the mode of permeation between the second-class gradient cen- ters. This model will improve the situation in the metropolitan communications.