Fig. 5
From: Vulnerability and robustness of interdependent transport networks in north-western Italy
Betweenness Centrality of Nodes. Source: Authors’ elaboration from iGraph R Package. Orange coloured nodes indicate those nodes whose betweenness centrality value falls within the fourth 4th quartile of the distribution, while nodes whose betweenness value falls between the 2nd and 3rd quartiles are indicated in light blue. In addition, the size of the nodes reflects the value of the centrality indicator. All other nodes are indicated in grey and with fixed size