Complex Network Based Efficiency Analysis of Tehran Metro Network

The evolution of Tehran subway networks has been investigated from a complex network perspective in order to analyze their structure, topology and functions. Tehran Metro networks are characterized by a large number of interconnected stations, which makes them highly dynamic and nonlinear systems. From a complex network perspective, The stations are the network’s nodes, and the lines connecting them are its edges. Metro networks display scale-free and small-world features, according to previous investigations, with preferential attachment forming the basis for their formation. Additionally, the evolution of Tehran metro networks is driven by transportation demand, economic activities, geography and urban planning. This study shows that the better network has been obtained during the evolution as the degree, clustering coefficient, and the shortest path length have been improved in the third phase but network robustness is not so high against to the attacks.