Effect of Optimization of Assignment to Evacuation Centers under Road Capacity Constraints on Tsunami Evacuation Time Reduction
道路容量制約下での避難場所割当の変更による津波避難時間短縮効果
This research intends to seek the optimal assignment to evacuation centers and evacuation routes considering road capacity that yields congestion and delay in refuge time from tsunami disaster. The authors show the difference in average refuge time in the case of allowing staying behavior due to congestion, and in the case of optimizing assignment to evacuation centers so as not to exceed the road capacity. The optimal assignment is obtained by the mathematical programming formulation that considers the evacuator flow at the fringe of tsunami inundation area and bottle necks. The authors also measure the effect of disaster mitigation by examining how tsunami refuge buildings can save refuge time. These results imply that change and ingenuity of flexible evacuation centers assignment can play a significant role in making evacuation plan efficient in areas with poor road infrastructure.津波避難時には高台へと向かう道路に一斉に避難者が集まることで滞留が発生し、避難時間が遅延することが考えられる。この研究では津波避難時に滞留を許容する場合と道路容量を超えないように避難場所の割当を最適化した場合の平均避難時間を比較する。また、津波避難ビルを設置した場合に、避難場所の最適な割当を決定し、津波発生時の減災効果を計測する。まず、津波避難時の状況の仮定や道路容量制約をもつ割当モデルを決める。割当モデルを適用する、もしくは滞留を許容する場合の両方の平均避難時間を比較する。次に、津波避難ビルを設置する、もしくはしない場合についても、割当モデルを適用する場合と滞留を許容する場合両方の平均避難時間を比較し、減災効果を計測する。結果として、滞留を許容せず、道路容量を超えないように割当を最適化したほうが平均避難時間は短縮され、さらに津波避難ビルを設置することで大幅に平均避難時間を短縮できることがわかった。
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09160647
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Authors:
- Sasa, Keiju
- Suzuki, Tsutomu
- Publication Date: 2014
Language
- English
- Japanese
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 543-548
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Serial:
- Journal of the City Planning Institute of Japan
- Volume: 49
- Issue Number: 3
- Publisher: City Planning Institute of Japan
- ISSN: 0916-0647
- EISSN: 2185-0593
- Serial URL: https://www.jstage.jst.go.jp/browse/journalcpij/-char/en
Subject/Index Terms
- TRT Terms: Evacuation; Highway capacity; Optimization; Programming (Mathematics); Route choice; Time; Tsunamis
- Subject Areas: Highways; Planning and Forecasting; Security and Emergencies; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 01545009
- Record Type: Publication
- Source Agency: Japan Science and Technology Agency (JST)
- Files: TRIS, JSTAGE
- Created Date: Nov 24 2014 3:51PM