Researchers Database
Haruo OzakiDepartment of Information Sciences and Arts Professor Institute of Regional Vitalization Studies Researcher Research Institute of Industrial Technology Researcher |  | ||
Last Updated :2025/04/19
Researcher Information
Degree
Research funding number
- 30204184
J-Global ID
Research Interests
Research Areas
- Social infrastructure (civil Engineering, architecture, disaster prevention) / Civil engineering (planning and transportation)
Education
- - 1984 The University of Tokyo 工学系研究科 土木工学
- - 1984 The University of Tokyo Graduate School, Division of Engineering
- - 1982 The University of Tokyo The Faculty of Engineering 土木工学
- - 1982 The University of Tokyo Faculty of Engineering
Association Memberships
Published Papers
Books etc
- やさしい交通流シミュレーション(共著)交通工学研究会(丸善) 2000
- 車両の追従挙動とサグの隘路現象学位論文 1994
- Car-Following Behavior and Bottleneck Phenomena at Vertical Aligument Sags1994
Conference Activities & Talks
- Data-based road & traffic administration utilizing ITSOzaki HaruoPPTMTC第1回C/P本邦研修, JICA東京センター, 2024年2月2日, 2月19日
- 外部環境への対処と交通管理 [Invited]尾崎 晴男交通管理技術研究発表会特別講演, 中央合同庁舎2号館 2023/11
- Data-based road & traffic administration utilizing ITSOZAKI HaruoJICA BATCP研修、アルメックVPI 2023/03
- 技術開発における標準開発の役割尾崎 晴男ITS国際標準化フォーラム、AP市ヶ谷 2023/02
- 事例報告2：東京国道事務所尾崎晴男第1回JSTEシンポジウム，福岡大学 2019/12
- Introduction to ITSOZAKI HaruoJICA ITS研修、JICA東京国際センター 2019/06
- 事例報告②（東京国道事務所） [Not invited]尾崎 晴男道路安全診断シンポジウム 2018/07 Nominated symposium
- Introduction to ITS [Not invited]OZAKI HaruoJICA ITS研修，JICA東京国際センター 2018/06 Public discourse
- Moderator & Introduction, “International Standardization on Cooperative ITS and Automated Driving by ISO/TC204” [Not invited]OZAKI HaruoThe 16th ITS Asia-Pacific Forum FUKUOKA 2018 2018/05 Nominated symposium
- Status of International Standardization on ITS [Invited]OZAKI HaruoUTMS seminar 2017 2017/11 Invited oral presentation
MISC
- 東京五輪は、交通・輸送の課題に取り組み、解決策を考える良い機会尾崎晴男 【2020×東洋大学】 2020/07
- 自動運転に向けた走行制御技術の標準規格尾崎 晴男 交通工学 54- (1) 27 -30 2019/01
- 交通工学における交通流研究応用数理 12, 2,38-48- 2002
- Research on Trattic Flow in Transportation EngineeringOyo-Suri 12, 2, 38-48- 2002
- 尾崎 晴男 道路交通経済 24- (3) 12 -17 2000
- Applying ITS for the Efficient Road ManagementRoad and Transportation-Economics&Practice 24- (3) 12 -17 2000
- 関東地方のロータリー交差点調査第25回土木学会関東支部技術研究発表会講演概要集 1998
- A Study on Rotaries in the Kanto District1998
- Capacity Studies and Their Application in JapanProc. of the Third International Symposium on Intersections Without Traffic Signals 1997
- 交通流-交通工学からのアプローチ物性研究 65- (5) 1996
- Traffic Flow-Approaches from Traffic EngineeringBussei Kenkyu(Kyoto) 65- (5) 1996
- OZAKI H. Proc. of the Third World Congress on Intelligent Transport Systems 1996
Industrial Property Rights
Awards & Honors
Research Grants & Projects
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 2006 -2008Author : OZAKI Haruo; NAKAMURA Hideki; OGUCHI Takashi道路交通において最も重要な位置を占める交差点を対象に、現行の設計手法の課題を改善することを目的に研究を実施した。渋滞時を含んだ計測交通量から、直接計測できない需要交通量を推定する手法を見出し、事故や渋滞が特に多い広幅員交差点の制御パラメータの設定法を車両交錯の回避の観点から分析した。さらに交差点制御の評価指標を既往文献から整理し、交差点の幾何構造と制御運用について、交通需要に応じた最適デザインの選択方法を提示した。
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 2006 -2008Author : KUWAHARA Masao; MORITA Hirohisa; OZAKI Haruo; NAKAMURA Hideki; OGUCHI Takashi; HAMAOKA Hidekatsu; TANAKA Shinji本研究は、性能照査型の道路設計に向けて、以下を取りまとめた。(1)道路設計の手順について現行の課題とこれからの性能照査型の設計のあり方について体系化を行った、(2)道路の階層区分について提案を行った、(3)階層的な道路区分にしたがってその配置とネットワーク性能の関係を定量的に解析した、(4)道路の性能(MOE)と幾何構造の関係についていくつかの新たな知見を明らかにした、(5)交通需要の変動を考慮した設計需要の取り扱い方に関する提案を行った。
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 2005 -2006Author : NAKAMURA Hideki; OZAKI Haruo; OGUCHI TakashiAs is often the case with some developed overseas countries, careful considerations should be given to details of road geometric design and traffic operations, in order to secure rational functions of road sections corresponding to their hierarchical categories. This study aims at collecting information and data regarding the issues mentioned above in some overseas countries, in order to investigate some improvements on road geometric design and traffic operation in Japan. By visiting universities and administration offices, interviews to several researchers and experts were performed, and related guidelines, manuals, research reports and practical project reports were obtained. Furthermore, traffic flow surveys through video recordings were conducted at four typical signalized intersections (3 in Germany and 1 in UK) and nine roundabouts (5 in Germany, 2 in US and 2 in Australia). These data were analyzed from a viewpoint of user behavior considering their geometric and operational features.
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 1996 -1997Author : OZAKI HaruoPedestrian traffic flow is studied by observation, collection and analyzes of data, and development of simulation considering pedestrians. In 1996FY,pedestrian flow at stairway was observed and analyzed. Stairways inside railway stations are chosen for the observation. Analyzes highlight that traffic capacity is newly introduced and there is an analogy between pedestrian and vehicular traffic flow. In 1997FY,pedestrian flow at level roadways is observed. Environments which affect pedestrian flow, such as physical geometry and surface conditions of sidewalks are studied through consulting technical guidelines and reference documents. Field observation are done at several sites in order to investigate the existing conditions and problem to be improved. Numbers of pedestrians are also interviewed to acquire users'needs on sidewalk design. Two types of sidewalk design are recommended in the technical guidelin : mounded-up type and flat type. Mounded-up type is superior in safety and drainage features. Flat type is good at smoothness without vertical gaps. According to site observations and users'interviews, both types have their own advantages. Local road authorities are found to choose their design of sidewalks considering level of accompanying road, construction cost, aesthetic conditions, and future possibility of road construction. On the matter of pavement materials, asphalt and concrete pavement have been standard. At sidewalks block pavements become acquiring popularity. It is found that pedestrians are not always favor of block pavements, if they are not well-maintained. The study also considers rotary intersections since major part of traffic accidents occur at intersections. Some European countries reports that roundabouts operate well enough to avoid severe accidents. Extensive inquiry activities resulted that 27 rotaries exist throughout the country. Simulation of pedestrian flow, ad-on modules for pedestrian flow are developed for a vehicular traffic simulation. It is found that observed traffic conditions are soundly simulated.
- 日本学術振興会：科学研究費助成事業Date (from‐to) : 1994 -1994Author : 尾崎 晴男1.首都高速道路に近接する高層ビルから交通流を約90分間にわたってビデオ撮影し、各車両の位置を0.2秒おきに画像処理手法で採取した。この観測データをもとに各車両の走行挙動を分析した結果、自動車運転者の加減速行動は基本的に前車両との相対速度に依存しているものの、行動の時間遅れが前車の加減速行動にも影響されていることが明らかにされた。これは、運転者が相対速度の変化率と前車の制動灯の情報をも認知しながら運転操作を行っていることと考察される。 2.渋滞流を走行する車両の走行挙動データの解析から、運転者の操作行動モデルを同定した。本モデルは既存のモデルに比較して、相対速度に対する時間遅れに上記から得られた特性を盛り込んだ点に特徴がある。 3.高速道路の渋滞のひとつの特徴である、縦断勾配がサグ形状となっている地点が溢路となる現象について観測データから分析を行った。その結果、運転者が視角から縦断勾配の変化を認識できないサグにおいては、変化を補償する加速ペダルの踏み込み行動が常に後手後手に回ることが溢路となる原因である、との仮説に至った。さらにこの仮説を2.で得た運転者の操作行動モデルをもとにしたシミュレーションで検証した。したがって人間が操作する自動車交通では、既設の特定のサグを溢路とする渋滞の発生は避けがたいものと考えられる。 4.サグを溢路とする渋滞を軽減するため、今後は、1)運転者が認知しやすい縦断勾配の変化構造に関する研究、2)運転者による縦断勾配変化の認知遅れを補償する支援装置の研究の2つの方向が考えられる。 5.以上の知見から平成7年度には、1)運転者による縦断勾配の変化の認知メカニズム、2)運転者による認知と操作行動との関連の両面を追求するため、科学研究費補助金の申請を行った。
- 日本学術振興会：科学研究費助成事業Date (from‐to) : 1992 -1994Author : 片倉 正彦; 鍋島 泰雄; 尾崎 晴男; 桑原 雅夫; 鹿田 成則; 松本 健二郎平成4、5年度の2カ年で開発したネットワークシミュレーションモデルのvalidity checkを交通事態調査により交通データを収集した東京都内の路線とを対象に実施し、本シミュレーションモデルが良好な再現精度を有していることが確認できた。実際の交通運用管理計画の立案及びその評価に本モデルを適用するために、交通データを収集することができた2都市の街路ネットワークを対象に本シミュレーションモデルを用いたバス運行管理計画及び交通渋滞対策の立案、評価を行った。その結果、開発したモデルが、計画・対策立案、評価及びそれらのフィードバックにともなう検討を行うための有用なルーツとなりうることが明らかとなった。 本研究で開発したネットワークシミュレーションモデルは、オブジェクト指向に基づいたプログラミング技法を用いて作成し、マンマシーンインタフェイスの部分に視覚的に優れたGUIの採用によって入力及び出力結果をグラフィルカルに表現できるようし、交通状況の時間的変化を非常にわかりやすうとらえられるようにしたことが他のシムレーションモデルいはない大きな特徴の一つである。上記の検討結果からもモデルの実現象の再現性のみならずそのグラフィカルな有用性が確認でき、実用性の高いネットワークシミュレーションモデルを開発することができた。 本ネットワークシミュレーションモデルの開発上の課題として以下の点があげられる。 (1)広域の街路ネットワークに対するオンラインリアルタイム処理手法を検討するために複数台のワークステーションによる同時並列処理のシミュレーション手法の開発。 (2)開発したネットワークシミュレーションモデルの実行と評価を容易にするためのパーソナルコンピュータを用いた入出力方法の開発。 (3)小規模ネットワークに対応した簡易なシミュレーションモデルを作成するために、開発したネットワークシミュレーションモデルのプログラムをパーソナルコンピュータ上へ移植すること。
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 1991 -1992Author : KOSHI Masaki; MURATA Takahiro; OZAKI Haruo; KUWAHARA Masao; TAKABA Sadao1) Three sub-systems that can evaluate and propose the improvement plans for existing signal control are developed. 2) The policy of improvements on signalized intersections are summarized into two, considering required data for the analysis. Policy a) Final optimization using all the required quantitative and qualititative data. Policy b) Gradual optimization using minimum quantitative data and observed qualititative data, following the repetition of trial and evaluation process. 3) The items on improvement of signalized intersections are summarized into three, considering the cost, availability of data, and social response. a) Improvements of signal control parameters are suitable for both policies a) and b). b) Improvements of signal phases or physical arrangements of intersections are suitable for policy b). c) Improvements by regulation or enforcement are suitable for policy b). 4) An expert system for improvement design of a signalized intersection is developed. This sub-system uses data that can be easily collected at site. It serves also for laymen and proposes the improvement plan that would be given by an traffic experts. 5) A system for improvement design of an signalized intersection is developed. This sub-system uses all the required data and optimizes all the items on design of a signalized intersection, including phases and lane arrangement. 6) A system for improvement design of signal offset is developed. This sub-system uses rough volume data that are collected by detectors and proposes the sub-optimal offset plan for any network configuration.
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 1990 -1991Author : KOSHI Masaki; OZAKI haruo; AKAHANE Hirokazu; KUWAHARA Masao1. Vehicle traffic flow was observed at congestion-prone sag section, Hadano sag on Tomei Expressway, on July 28, 1990 and July 29, 1991. (1)Traffic flow was video recorded by video cameras mounted on a balloon. Vehicles' movement was tracked by video image processing. Traffic volume and speed were also observed by video and vehicle detectors. (2)It was found that congestion starts at sag section and the position of the head of congestion moves back and forth around spot which is regarded as the bottleneck. 2. A car-following experiment was implemented in the Tsukuba test course of a circuit of 6.1 kilometers. The speed and clearances were measured by test vehicles. It was suggested that lighting of stop lamp should be considered on car-following model. 3. new car-following models were proposed for two modes ; for free flow mode and for congested flow mode. 4. Drivers' transition of car-following behavior from free flow mode to congested flow mode seems to start when they join a queue and to be completed when they have been in the queue for a a little less than ten minutes. Bottleneck capacity becomes lower as the congestion queue grows longer. 5. Departure flow rate from a queue is higher in higher light level of the environment and is further higher when the light condition changes from darker to brighter level.
- Japan Society for the Promotion of Science：Grants-in-Aid for Scientific ResearchDate (from‐to) : 1988 -1990Author : KUWAHARA Masao; OZAKI Haruo; AKAHANE Hirokazu; KOSHI MasakiThis study discusses capacity of weaving sections based on several observations on the Metropolitan Expressway. The study is divided into two parts : a macroscopic analysis of traffic flow conditions such as flow, speed, and density of traffic in a weaving section, and a microscopic analysis of each vehicle motion in order to develop a simulation model which can reproduce weaving capacity. For the macroscopic analysis, we first show that capacities of some weaving sections are lower than those of simple section by at most 26% and that the capacities vary depending on highway geometry and traffic conditions such as weaving lengths and volume ratios. Secondly, we compare values of weaving influence factor estimated by the 1965-HCM (Highway Capacity Manual) with the observed values. The estimates were found to be slightly smaller than the observed values. Thirdly, we examine applicability of four different existing methods for predicting weaving speed ; those are the 1985-HCM, JHK, PINY, and Leisch methods. The 1985-HCM method gives the best agreement with the observed speed but the PINY and Leisch methods tend to underestimate the speed. For the microscopic analysis, using vehicle trajectory data obtained from observations, microscopic variables such as relative position and relative speed of weaving vehicles are analyzed. Based on these data, a simulation model estimating weaving capacity was developed. It is considered that weaving vehicles are always selecting an optimum acceleration and the required time for lane changing corresponding to the aimed gap, and they adjust these variables until the weaving is completed. In this model, every vehicle momentarily updates such particular maneuvers precisely by predicting its condition at the moment the weaving is completed. The simulation model was validated at two congested weaving sections on the Metropolitan Expressway. As a result, the simulated values f capacity and speed fit well with the observed ones. Finally capacities at the weaving sections under various traffic and geometric conditions were discussed.
- 高度交通社会の研究
- 交通制御の研究
- 交通シミュレーションの研究
- 車両の挙動に関する研究
- Research on Inteligent Trausport Society
- A Study on Traffic Control
- A Study on Traffic Simulation
- A Study on Vehicle Behavior