Accessibility Analysis of Risk Severity

Loading...
Thumbnail Image

View/Download File

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Accessibility Analysis of Risk Severity

Published Date

2015

Publisher

Type

Working Paper

Abstract

Risk severity in transportation network analysis is defined as the effects of a link or network failure on the whole system. Change accessibility (reduction in the number of jobs which can be reached) is used as an integrated indicator to reflect the severity of a link outage. The changes of accessibility before-and-after the removing of a freeway segment from the network represent its risk severity. The analysis in the Minneapolis - St. Paul (Twin Cities) region show that links near downtown Minneapolis have relative higher risk severity than those in rural area. The geographical distribution of links with the highest risk severity displays the property that these links tend to be near or at the intersection of freeways. Risk severity of these links based on the accessibility to jobs and to workers at different time thresholds and during different dayparts are also analyzed in the paper. The research finds that network structure measures: betweenness, straightness and closeness, help explain the severity of loss due to network outage.

Description

Related to

Replaces

License

Series/Report Number

Funding information

Accessibility Observatory, University of Minnesota, RP Braun/CTS Chair in Transportation

Isbn identifier

Doi identifier

Previously Published Citation

Suggested citation

Cui, Mengying; Levinson, David, M. (2015). Accessibility Analysis of Risk Severity. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/179836.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.