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Measuring the Connectivity of Nodes in Road Networks  

Park, Jun-Sik (한국교통연구원)
Gang, Seong-Cheol (한국교통연구원)
Publication Information
Journal of Korean Society of Transportation / v.28, no.4, 2010 , pp. 129-139 More about this Journal
Abstract
This study proposes a model for measuring the connectivity of nodes in road networks. The connectivity index between two nodes is characterized by the number of routes, degree of circuitousness, design speed, and route capacity between the nodes. The connectivity index of a node is then defined as the weighted average of the connectivity indexes between the node and other nodes under consideration. The weighting factor between two nodes is determined by the travel demand and distance between them. The application of the model to a toy network shows that it reasonably well quantifies the level of connectivity of nodes in the network. If flow of rail networks can be measured in the same scale as that of road networks and the capacity of rail links can be estimated, the model proposed in this paper could be applied to intermodal transportation networks as well.
Keywords
Connectivity of a Node; Connectivity Index; Road Networks; Reliability; Route Set;
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