Advanced Mobility Research Centre has been established in April 2009 to promote fruitful social life by means of mobility improvement using ITS technology. This manuscript introduces the vision and mission of the centre : (1) needs oriented research and its utilization, (2) training engineers and scientists to have broad fundamental knowledge on ITS and (3) regional and international collaboration. [This abstract is not included in the PDF]
The present when 100 years or more passed since a gasoline car was invented, this paper gives an outline about a problem and a technique of the car society. As car energy, the car is advancing toward the direction to EV and electric HV. And not only the energy efficiency of car unit improvement but also the infrastructure maintenance and the introduction of ITS are indispensable. Intentional unification is necessary to cause innovation, I hope it for activity of Advanced Mobility Research Center, the University of Tokyo. [This abstract is not included in the PDF]
Direction of next generation ITS is realization of the vigorous and attractive urban development by ITS Smart Town which generates new industries and informatization. ITS is a wide field of social changes where there are innovative technology progress of IT, change of social needs and generation of new industries. Japan is world-leading ITS state. It must maintain its position as world-leading ITS state. It would appear that implementation of industry-government-academia joint researches, return the results of them to society and promotion of ITS business in collaboration with private companies are future roles of Advanced Mobility Research Center. [This abstract is not included in the PDF]
I have approached studies that enhance the appeal of transportation systems with the view point of speed-up and improvement of convenience or comfort from the standpoint of vehicle engineering. From establishment of Collaborative Research Center for Advanced Mobility, the predecessor of Advanced Mobility Research Center (ITS Center), I am engaged on studies on interaction with infrastructure. Recently, I am interested in the grand-design of transportation system and the modal-mix. In this paper, studies on automobile technologies with use of Intelligent Transportation Systems, railway vehicles that can run in curves smoothly, Personal Mobility Vehicle, etc. which the author is now being engaged on are introduced. [This abstract is not included in the PDF]
In the ITS next stage, complicated traffic condition, where number of cars interact each other and make conflicts, should be a significant subject in driver assistance and traffic control. In Suzuki Lab, research works on human driver models in complicated mixture traffic condition using integrated simulator environment in our ITS center are to be considered. In reproduction of mixture traffic flow, simulation accuracy is simultaneously validated from macroscopic and microscopic viewpoints in order to realize a multi-scale virtual experimental environment. Using such virtual experimental environment, several research developments are proposed such that human driver behaviors are simultaneously evaluated by various measures of safety, smoothness and ecology and effectiveness of driver assistance based on classification of driver characteristics is analyzed. [This abstract is not included in the PDF]
Dynamic methodology considering time evolution is essential in traffic analysis since the phenomena vary along the time progress. And it is also needed not only constructing new infrastructure but also utilizing existing assets due to the recent social and economical situation. ITS has a great possibility to manage the transportation system in these aspects. In this paper, recent research activities in Advanced Mobility Research Center are introduced and the possibility of traffic operation and management using ITS is discussed. [This abstract is not included in the PDF]
What should by done in information engineering for realizing livable society with smooth flow of people and vehicles is to construct 90%-intelligent system and to construct information space by which a person can make a final 10% decision smoothly. The “virtual urban space” is one of its embodiments in intelligent transport systems. The virtual urban space is constructed by correcting static information as building structures and dynamic information as activities of humans and vehicles, and by combining technologies on visualization, prediction, searching and network communication, on which various applications can be created. [This abstract is not included in the PDF]
Advanced Mobility Research Center (ITS Center), Institute of Industrial Science, The University of Tokyo was established in April, 2009. In celebration of its establishment, the memorial symposium was held on 11th June, 2009. In the symposium, the panel discussion “Necessary Research Development and Human Resource Development on ITS from Now %ndash;Expectation for Advanced Mobility Research Center–” was presented with panelists who were invited from ministries relation to ITS. In the panel discussion, panelists introduced their approaches to ITS in each ministry first. Panelists, the chairman and audience discussed necessary approaches on ITS in the university through above introductions. [This abstract is not included in the PDF]
ITS entered the 2nd stage by the appearance of the multi application ITS on-board unit which has Dedicate Short Range Communication (DSRC) used for ETC. Japanese ITS has evolved from VICS to ETC. However it depends on public services. 2nd generation ITS on-board unit has functions of interactive communication, credit card payment and so on. Making use of these functions as platform of service provider, private sectors are able to develop various applications and services. This paper reports the use case of 2G ITS on-board unit for tourism. It will boost the development of the area and attract tourists.
This paper suggests a performance-evaluation method for dynamic traffic operations, which uses two traffic simulators of different scales so that the influences of dynamic traffic operation strategy on not only the local area but also the road network are evaluated systemically. Dynamic channelization on JCT merging sections of Tokyo Metropolitan Expressway is analyzed as a case study. The result shows that, even if a strategy is effective for a local area, it is not always effective for the entire network. Thus, the method is considered to be effective for evaluating performance of dynamic traffic operations properly.
Recently, studies on eco-driving based on ITS technology are conducted widely. Information on the driver or his/her vehicle is considered in a lot of these studies. When people drive an actual vehicle, the way of driving varies from surrounding conditions such as traffic conditions, road alignments. Therefore, not only information on the driver or his/her vehicle but also another one on traffic conditions, distance between two cars, traffic lights, road gradient must be considered. In this study, the technique of evaluation on the skill level of eco-driving which considers a driver’s behavior and surrounding conditions is proposed. In this paper, a validation of proposed technique is described.
We reconstructed textured urban 3D models by matching in time-series a video stream of on-vehicle camera and an existing 3D digital map. For extracting features in urban scenes, we improved the conventional Epipolar Plane Image (EPI) and proposed Temporal Height Image (THI), where width and height information of building candidates are included in the space-time image. Also, we classified matching patterns of the building candidates based on the features, and designed a DP matching system. Finally, a textured 3D models could be reconstructed.
In this paper, evaluation of effectiveness of ITS assistance service in merging section from various measures of smoothness, safety and energy consumption using simulation environment which can reproduce mixture traffic flow is proposed. Especially, transient situations with various diffusion rates or submission rates are simulated and their difference of effectiveness is analyzed. In the transient period of ITS installation, it should be important such quantitative evaluation using simulation tools with various measures.
The authors propose two new methods to estimate road roughness from accelerations of a body and strokes of suspensions of an automobile and to identify modes of vibration of a simply supported beam from low-signal-to-noise-ratio measured accelerations using independent component analysis (ICA) and parallel factor analysis (PARAFAC), respectively. The numerical simulations are conducted to examine the performances and the results show the proposed two methods are effective. These are expected to be new tools for condition monitoring of future vehicles with technologies of intelligent transport system, ITS.
Intelligent Space is a space with ubiquitous sensors and actuators. This paper discusses possible applications of Intelligent Space to intelligent transportation systems. Our ongoing research on Intelligent Space related to the applications including system integration, object tracking, mobile robot control and a spatial human interface is introduced.
A wave-based 2.5-dimensional numerical analysis method for prediction of road traffic noise was developed. Some applications of 2.5-dimensional numerical analyses based on a frequency domain numerical analysis such as boundary element method have been reported so far. In this study, 2-D to 3-D conversion technique based on a transient response was newly formulated. The developed method was applied to an insertion loss of noise barriers and noise prediction around a semi-underground road structure, and the validity of the analysis method was confirmed by comparison with physical experimental results. Furthermore, the calculation was utilized to develop a practical calculation model of noise radiated from semi-underground roads.