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Development of road network vulnerability analysis focusing on required functions immediately after a disaster

Research Project

Project/Area Number 21K14258
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 22050:Civil engineering plan and transportation engineering-related
Research InstitutionHokkaido University

Principal Investigator

Satoshi Sugiura  北海道大学, 工学研究院, 准教授 (30648051)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Discontinued (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords災害 / 道路網分析 / ネットワークデザイン問題 / グラフ理論 / 脆弱性 / 道路網脆弱性分析 / 孤立脆弱性 / Gomory-Hu木 / 最小カット / 被災時の孤立 / 緊急避難計画
Outline of Research at the Start

本研究課題は災害発生直後の道路網に求められる接続性に着目し,道路網のわずかな損傷により簡単に接続性を失うような脆弱な箇所を特定する手法を構築するものである.具体的には大規模災害による孤立の生起しやすさ,および広域避難時における道路網がもつ局所的な容量と通過需要の関係を表現した2つの脆弱性指標を定義し,その導出法を構築する.構築した手法は大規模災害も頻発し,道路網が疎である北海道に適用する.さらに,脆弱性を緩和するための最適施策を検討するためのネットワークデザイン問題を定式化し,求解法を与える.これら一連の検討により,接続性向上のための道路網整備戦略の方針を示す.

Outline of Final Research Achievements

This study aims to provide a method for evaluating the vulnerability of road networks and proposing improvement measures. Using the minimum cut theory, we developed two indicators to assess connection strength: isolation vulnerability and local capacity vulnerability, and constructed models to calculate these indicators. These indicators were applied to actual road networks to identify locations prone to isolation and areas expected to be congested during mass evacuations. Additionally, we formulated a network design problem to mitigate isolation vulnerability and identified new road sections to be added to reduce isolation vulnerability at key locations in northern Hokkaido. These research outcomes were published in two high-level academic journals and are considered to have received a certain level of recognition.

Academic Significance and Societal Importance of the Research Achievements

本研究は災害直後に道路網が要求される性能,すなわち避難路としての冗長性,および孤立生起のしやすさを評価し,その水準を増強するための方策を与えるものである.構築したモデル群はいずれも実際の道路網で適用できることを確認しており,実務適用も可能であると考えている.構築した手法論は,以降の防災計画において資するところが小さくないと考える.

Report

(3 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Research-status Report
  • Research Products

    (9 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (5 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Isolation vulnerability analysis in road network: Edge connectivity and critical link sets2023

    • Author(s)
      Sugiura Satoshi、Kurauchi Fumitaka
    • Journal Title

      Transportation Research Part D: Transport and Environment

      Volume: 119 Pages: 103768-103768

    • DOI

      10.1016/j.trd.2023.103768

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A NETWORK CONTRACTION METHOD BASED ON GOMORY-HU TREE WITH NODE AGGREGATION TO COMMUNITY CENTROID2023

    • Author(s)
      NARUOKA Ryosuke、SUGIURA Satoshi
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)

      Volume: 78 Issue: 5 Pages: I_483-I_490

    • DOI

      10.2208/jscejipm.78.5_I_483

    • ISSN
      2185-6540
    • Related Report
      2022 Annual Research Report
  • [Journal Article] FLOOD EVACUATION OPTIMIZATION UNDER MULTIPLE TRANSPORTATION MODES2023

    • Author(s)
      ASADA Tomohiro、SUGIURA Satoshi
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)

      Volume: 78 Issue: 5 Pages: I_141-I_151

    • DOI

      10.2208/jscejipm.78.5_I_141

    • ISSN
      2185-6540
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Vulnerability analysis of cut-capacity structure and OD demand using Gomory-Hu tree method2021

    • Author(s)
      Satoshi Sugiura, Anthony Chen
    • Journal Title

      Transportation Research Part B: Methodological

      Volume: 153 Pages: 111-127

    • DOI

      10.1016/j.trb.2021.08.013

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Connectivity enhancement network design problem for emergency receiving bases: on the concept of isolation vulnerability2022

    • Author(s)
      Akioka, M., and Sugiura, S.
    • Organizer
      The 26th International Conference of Hong Kong Society for Transportation Studies
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 生活必需施設の配置と住民のトリップに着目したグラフカットに基づく生活圏検出手法の構築2022

    • Author(s)
      只隈大暉,杉浦聡志
    • Organizer
      第65回土木計画学研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Gomory-Hu木に基づくコミュニティセントロイドへのノード集約によるネットワーク縮約手法の構築2022

    • Author(s)
      成岡亮佑,杉浦聡志
    • Organizer
      第65回土木計画学研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2 点間旅行距離を増大させるリンク集合特定手法の開発2022

    • Author(s)
      佐々木颯馬,杉浦聡志
    • Organizer
      土木学会北海道支部 令和3年度年次技術研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] Gomory-Hu木を援用したセントロイド周辺ノードの集約によるネットワーク縮約手法の構築2022

    • Author(s)
      成岡亮佑,杉浦聡志
    • Organizer
      土木学会北海道支部 令和3年度年次技術研究発表会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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