Functionality Assessment of Road Network Combining Flood Roadworthiness and Graph Topology

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

Flood hazards can affect road networks by closing roads, extending travel distances and lengthening travel times. This paper innovatively integrates flood hazard, road network topology and vehicle vulnerability via a severity factor to assess the accessibility of exposed links and the performance of the whole network. The overall network functionality loss under different flood return periods is assessed by evaluating the functionality of each network link for cars and SUVs. The most vulnerable links are identified and used to assess the performance of the entire network using topology-based metrics such as average shortest paths and isochrones. The case study of Bristol (UK) is investigated. It is demonstrated that network status is a function of vehicle typology, with SUVs exhibiting naturally stronger resistance to flood than cars. This finding can support preparedness strategies of road networks in the face of future flood events.
Original languageEnglish
Article number104354
JournalTransportation Research Part D: Transport and Environment
Volume135
DOIs
Publication statusPublished - 2024

Bibliographical note

Publisher Copyright:
© 2024 The Author(s)

Keywords

  • Hazard intensity measures
  • Safety and severity factors
  • Link classification
  • OpenStreetMap
  • NetworkX
  • Network performance

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