  Indian Railway Network has been analyzed on the basis of number of trains
directly linking two railway zones. The network has been displayed as a
weighted graph where the weights denote the number of trains between the zones.
It may be pointed out that each zone is a complex network in itself and may
depict different characteristic features. The zonal network therefore can be
considered as a network of complex networks. In this paper, self links,
in-degree and out-degree of each zone have been computed which provides
information about the inter and intra zonal connectivity. Degree passenger
correlation which gives an idea about number of trains and passengers
originating from a particular zone which might play a role in policy making
decisions has also been studied. Some other complex network parameters like
betweenness, clustering coefficient and cliques have been obtained to get more
insight about the complex Indian zonal network.
