Accessibility Analysis of Risk Severity

Mengying Cui and David Levinson

No 134, Working Papers from University of Minnesota: Nexus Research Group

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.

Keywords: GPS data; congestion; network structure; accessibility; vulnerability (search for similar items in EconPapers)
JEL-codes: R14 R41 R42 (search for similar items in EconPapers)
Date: 2015
New Economics Papers: this item is included in nep-rmg, nep-tre and nep-ure
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Published in Transportation. 45(4), 1029–1050 (2018)

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http://hdl.handle.net/11299/179836 First version, 2015 (application/pdf)

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Journal Article: Accessibility analysis of risk severity (2018)
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Persistent link: https://EconPapers.repec.org/RePEc:nex:wpaper:vulnerability

DOI: 10.1007/s11116-017-9837-4

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