Analysis of Road Network Topology Vulner-ability and Critical Links
Xiaohong Chen · Journal of Tongji University · 2010
When catastrophic incidents such as earthquake happen,one or several links may lose its(their) functions totally.Then whether the network and origin-destination(OD) pairs are still connected becomes the most critical problem.Therefore,this paper presents a study of the road networks' abilities to undergo incidents from the point of view of its topology.The assessment index mincuts frequency vector prevailing in the field of telecommunication is intreduced into the assessment of topology vulnerability of road network.Since this index is comparable between different networks,it can reveal the structure characteristics with a consideration of the difference of links' abilities to undergo incidents.The definition and algorithm of the index are described by trial networks.The results are then used for the identification of critical links.With consideration of the links' abilities to undergo the incidents,the index is adopted to evaluate the effect of improving critical links.