作 者：路庆昌
发表时间：2016-08-15
概要：
In terms of urban rail transit network vulnerability, most studies have focused on the network topology characteristics and travel cost changes after network incidents and analyzed rail transit network independently. The neglects of passenger flow distributions on the network and alternative public transport modes under rail network disruptions would either underestimate or overestimate the vulnerability of rail transit network, and thus lead to inaccurate results and decisions. This study presents an accessibility-based measure for urban rail transit network vulnerability analysis and explicitly accounts for rail passenger flow characteristics, travel cost changes, and alternative transit modes. The proposed method could be used for failures of station, link, or line as well as simultaneous disruptions of these network elements.
The accessibility measure is demonstrated with an example problem and compared with methods in the literature. It is shown that the proposed approach is capable of measuring the consequences on rail network, and the advantages of the accessibility method are demonstrated and compared. The methodology is applied to the urban rail transit network of Shenzhen, China in a multi-modal public transport networks. The results reveal that the consequences of disruptions on network accessibility are obviously different for stations with different passenger flow characteristics, and some undisrupted stations are found to be vulnerable under surrounding station failures. The proposed methodology offers reliable measurements on rail transit network vulnerability and decision implications for mitigation measures and investment priorities under rail network disruptions.
关键词：Network vulnerability analysis; Urban rail transit; Accessibility; Multi-modal transit network; Disruption
