Evaluation model for dynamic bus network planning in reconstruction process of great disaster area

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04655
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22050:Civil engineering plan and transportation engineering-related
• Research Institution: Shibaura Institute of Technology
• Principal Investigator: IWAKURA SEIJI 芝浦工業大学, 工学部, 教授 (20223373)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 大規模被災地 / 復興過程 / バスネットワーク / ZDD / モバイル空間データ / 岩手県宮古市

Outline of Final Research Achievements

In the areas affected by the Great East Japan Earthquake, land use changed rapidly from evacuation shelters to temporary housing, and then to relocation to higher ground and public housing for disaster victims. During the reconstruction process, the population distribution of the residents changed dramatically. In inconvenience to residents' mobility, it is necessary to reorganize the public transportation network to respond quickly to the land use changes.
To solve this problem, we developed a technology to support the extraction of a bus network that can reorganize bus routes sequentially in a short period of time, using ZDD, a method to perform extremely high-speed computation to enumerate all routes on the network, to create a set of candidate bus routes, and to analyze the evaluation functions of operators and users, day-to-day traffic flows using NTT Mobile Spatial Statistics, and the data of the bus route network.

Free Research Field

土木計画学

Academic Significance and Societal Importance of the Research Achievements

バス事業者と利用者双方の評価を統合したバスネットワーク再編の複数案の順位を安定的に解き，かつ携帯位置情報データを用いて被災地の土地利用の急速な変化に整合するバスネットワークの解が得られる独創的な解析方法の研究である．さらに，これまで大手バス事業者でも経験則で構築していたバスネットワークを，計画の立て方自体をも大局的かつ論理的に構築する方法として，被災後の公共交通ネットワーク計画に大きなパラダイムシフトを与える意義のある研究と考える．一般的なコンピュータの計算可能量を大幅に超える長大ネットワークでなければ確実に計算結果を得られ，かつ無料の数値解析ソフトウェアでプログラム開発して実務へ提供できる．