| Project/Area Number |
12680446
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
社会システム工学
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| Research Institution | Saga University |
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Principal Investigator |
TADAKI Shin-ichi Saga University, Computer and Network Center, Professor, 学術情報処理センター, 教授 (00202169)
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| Co-Investigator(Kenkyū-buntansha) |
NISHINARI Katsuhiro Ryukoku University Department of Applied Mathematics and Information Associate Professor, 理工学部(2002年度は在外), 教授 (40272083)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
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| Keywords | Traffic Flow / Coupled Map Model / Observational Data / On-line Database / Simulation / 離散模型 |
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| Research Abstract |
Traffic flow models and their simulations have been activated since 1990s in viewpoints of dynamical phase transition and pattern formation. Currently the focuses move to construct realistic multi-lane models with lane-changing rules. There are some models including the model of this research project and cellular automaton models. And researches with observational data have been also activated.
The coupled map optimal velocity model, proposed in this research project, describes the motion of a car depending on the headway to the preceding car. Parameters in optimal velocity functions are assigned to each car independently. Object oriented program languages are suitable for simulating such systems. We developed simulation codes with C++ and Java.
With this model, we observe the stable low-speed flow at the upper stream of a tunnel. The synchronized flow, which is considered to be the proper phenomena in two-lane systems, can be found even in an one-lane system.
We also developed the fundamental part of an on-line traffic data analyzing system. The system consists of a database system of road information, an analyzer to draw results and Web interfaces. We introduced data from Tomei, Meishin, Higashi-Meihan and Ise expressways. The research group including the member of this research project found various new findings with this system.
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