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Sakae YOKOYAMA, Shinichi SAKAMOTO, Tomohiro KOBAYASHI, Hideki TACHIBAN ...
2013 Volume 65 Issue 2 Pages
97-100
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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Recently, hybrid cars and electric vehicles have come into wide use, therefore acoustical nvironment inside /outside the cars have considerably changed. In this study, the interior noises in n electric passenger car have investigated compared with ones in a gasoline car. Using a gasoline ar and an electric car, the interior noises were measured under the conditions including not only teady running but also acceleration/deceleration running in a proving ground. To investigate the ubjective impression on the running noise by laboratory experiment, the 3-dimensional sound imulation technique was applied. Using this system, natural aural impression can be realized in an nechoic chamber. In the simulated sound field using field measurement recordings, subjective udgments were performed.
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Masahiko AKI, Kimihiko NAKANO, Yoshihiro SUDA
2013 Volume 65 Issue 2 Pages
101-103
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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This paper deals with development of a security brake system for improvement safety of brake systems in the energy-saving ITS project. In former development, a redundant brake system had parallel placed with a main brake system for keeping a safety in automatic platooning experiment. However, these main and redundant brake systems have the same-type EBS computer. In this paper,safety brake as a third brake system is developed by mechanical type system for safety improvement in automatic platooning experiments.
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Masahiko AKI, Kimihiko NAKANO, Yoshihiro SUDA, Tomonori KISHINAMI, Nao ...
2013 Volume 65 Issue 2 Pages
105-107
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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This paper deals with a feasibility study of sensor systems for automatic driving in a private road. The energy-saving ITS project has been researching for the automatic platooning driving of heavy-duty vehicles using several sensing systems. In this research, a usability of the sensing system is examined by a long term measurement environment. Therefore, the sensing system for the long term measurement is constructed in a trailer-type heavy duty vehicle. The sensing systems work during the vehicle running in the private road.computer. In this paper, safety brake as a third brake system is developed by mechanical type system for safety improvement in automatic platooning experiments.
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Hiroshi HIRAI, Seiji HAYASHI, Shuichi KANARI, Maya NAKANO, Shin KIMURA ...
2013 Volume 65 Issue 2 Pages
109-112
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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In the NEDO energy-saving ITS project, in order to make a regional area applicable to evaluation, the mesocopic CO
2 emissions model (meso-EM) is developed. The input data of the meso-EM is the simplified running pattern to estimate CO
2 emissions. A certain kind of ITS applications cause the change of the running pattern which is not reflected in the simplified running pattern. The change of the running pattern causes the change of CO
2 emission. The methodology which enables the estimation of the change of CO
2 emission at low cost for such ITS applications was proposed and verified, and it was confirmed that the estimation accuracy is high enough.
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Katsushi IKEUCHI, Masao KUWAHARA, Takashi OGUCHI, Shunsuke KAMIJO, Tak ...
2013 Volume 65 Issue 2 Pages
113-116
Published: January 22, 2013
Released on J-STAGE: June 19, 2013
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It is an urgent task to reduce the amount of CO
2 emission from road traffics. We are constructing a system to prompt general citizens to perform eco-friendly travel behavior by distributing and showing “
Regional Traffic Information" taking advantage of information and communication technologies. Traffic situations are observed at several points by using existing monitoring cameras etc., and the whole situation of the targeted area is estimated by integrating and interpolating themselves and other statistic data. From this CO
2 emission is calculated, visualized with VR technology, and displayed on information terminals of the citizens. In Dec. 2012, the field operation test started in Kashiwa City in Chiba Prefecture to explore the acceptability of this system and how their travel behavior changes from usual by this system.
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Akira MITSUYASU, Hirokazu ICHIKAWA, Yuji TAMURA, Masato HASEGAWA, Masa ...
2013 Volume 65 Issue 2 Pages
117-122
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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In this paper, we report a preliminary survey for development of a system which raises citizens'wareness of environment and promotes eco-friendly traffic behavior by provision in a comprehensive ay for regional transport information which varies hour to hour. In particular, we carried out uestionnaire survey about daily use of transportation to citizens who live in the target area of rovision and its surrounding area. Finally, we consider an effective way of provision and contents of it.
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− Region Promotion of Nagasaki Prefecture by Nagasaki EV&ITS Project −
Takahiro SUZUKI
2013 Volume 65 Issue 2 Pages
123-128
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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“Nagasaki EV&ITS Project", a practical penetration and operation project of EV and ITS which Nagasaki Prefecture is promoting in Goto islands area, Nagasaki, started from introduction of 100 EVs and introduced quick chargers and ITS spots as infrastructures for EV stress-free environment. The aim of the project is revitalization of isolated islands area through construction of“Driving Tours of the Future"model. In this paper, the latest progress of the project is reported, and various directly and indirectly related projects and actions starting with the EV&ITS project as a chance are introduced.
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Takahiro SUZUKI, Shintaro ONO
2013 Volume 65 Issue 2 Pages
129-132
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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For three days from September 2 to 4 in 2012, students and researchers from three universities as Univ. of Tokyo, Nagasaki University and Nagasaki Institute of Applied Science gathered to a summer school in Goto islands, Nagasaki.
This was a trial of field experience workshop of advanced technology introduction by uniting local students and students from external areas as Tokyo.
This article introduces the report, circumstances, targets, and significance of the school.
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Takayuki HIRASAWA, Motomune KATAOKA, Makoto OGASAWARA, Hitomi ISHIKAWA ...
2013 Volume 65 Issue 2 Pages
133-138
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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Tourist information sites are supplying town strangers with valuable mobility support information,while they need more ICT in making full use of visitor's data from viewpoints of marketing analysis and to assist business improvement of site officers. This paper proposes some ideas to introduce ICT at tourist information sites in site-friendly forms to aim at promoting stop-by round trip tourism for economical area activation and at applying also for natural hazard situations, through analysis of rural and city tourist information sites.
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Daisuke OSHIMA, Shinji TANAKA, Takashi OGUCHI
2013 Volume 65 Issue 2 Pages
139-143
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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After the Great East Japan Earthquake, which occurred on March 11, 2011, heavy traffic congestion continued in Tokyo for a long time. In this study, the traffic situation in Tokyo following the earthquake is reproduced using a traffic simulation model, and the factors generating heavy traffic congestion are clarified. Moreover, traffic regulation scenarios in the center of Tokyo in the case of a disaster are examined using the simulation model, and their effectiveness is analyzed.
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Tawin TIRATANAPAKHOM, Takashi OGUCHI, Shinji TANAKA, Sungjoon HONG, Hi ...
2013 Volume 65 Issue 2 Pages
145-149
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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An understanding of variability in travel behavior is essential for both analytical and operational processes. Conventional methods rely on interpersonal variability from one-day data. However, it has been found that the intrapersonal variability may constitute a substantial proportion in the total variability. The availability of electronic toll collection (ETC) opens possibilities to collect multiday individual data. This paper uses the multiday ETC data on Tokyo Metropolitan Expressway in 2010- 2011 to examine the interpersonal and intrapersonal variability of the daily travel behavior. This long term data can be used to observe the effects of the day and the month to these two types of variability.
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Daisuke OSHIMA, Shinji TANAKA, Tomoyoshi SHIRAISHI, Tadashi KOMIYA, Hi ...
2013 Volume 65 Issue 2 Pages
151-156
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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To gain an international acceptance for an evaluation result of CO
2 emission using a traffic simulation model, the Energy ITS project proposes a framework for validation of traffic simulation models and CO
2 emission models, and tries to build a consensus through international workshops. A validation trial to confirm the feasibility of the proposed validation framework was carried out. Furthermore, an experiment on the effect of the Eco-Driving on traffic capacity of signalized intersection was conducted to validate reproducibility of the traffic simulation model.
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Shogo KITAHONOKI, Takashi OGUCHI, Shinji TANAKA, Sungjoon HONG, Daisuk ...
2013 Volume 65 Issue 2 Pages
175-179
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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This paper aims at the quantitative evaluation of the effect of Eco-Driving (‘Moderate Acceleration') on traffic capacity at signalized intersections. Although there are many studies which indicate the effectiveness of Eco-Driving in terms of CO
2 emissions from a single vehicle, the evaluation of CO
2 emissions considering the effect of Eco-Driving on traffic flow has not been achieved yet. Therefore, we develop the model which can estimate the traffic capacity of a signalized intersection with the consideration of the effect of Eco-Driving, and find that the decreasing effect of traffic capacity becomes large as the penetration rate of Eco-Driving vehicles becomes high
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Hisatomo HANABUSA, Masato KOBAYASHI, Katsuaki KOIDE, Ryota HORIGUCHI, ...
2013 Volume 65 Issue 2 Pages
181-186
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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We describe a development of an on-line traffic simulation system called“Nowcast Traffic Simulation System"for road traffic in urban areas. The system can reproduce the traffic situation based on various types of traffic data in real time such as probe data and traffic sensor data. And the output data is used for several traffic information services including CO
2 monitoring. In this paper, we explain the theoretical concept and the framework of Nowcast Traffic Simulation System giving an example of the demonstration experiment in Kashiwa city.".
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Yuji TAMURA, Hiroshi WARITA, Takahisa INATOMI, Naoki FUNAOKA, Kou SATO ...
2013 Volume 65 Issue 2 Pages
187-193
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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The traffic control system of the Tokyo Metropolitan Expressway is considering an implementation of the online short-term prediction by the real-time simulation. Some modules for making exact traffic conditions prediction at the incident congestion -“Emergent Bottleneck Detection", “Lane Blockade Time", “Road Capacity", “On-Ramp Traffic Volume Change", and “Off-Ramp Conversion"-were developed. This research reports the result of having analyzed the influence which those modules have on the predictive simulation.
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Jinyoung KIM, Hisatomo HANABUSA, Masao KUWAHARA, Takeshi OHATA, Ryota ...
2013 Volume 65 Issue 2 Pages
195-200
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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In this research, we suggested an improved method of constructing database for data fusion of mobility, disaster, externals etc. And analysis system of the data fusion was developed using the database for creating information for traffic management in disaster and normal situations. We built an evacuation simulation as one example of data fusion analysis system. Not only network and OD data but also population and tsunami data were used as inputs. The Great East Japan Earthquake was simulated and analyzed traffic flow. Road and shelter capacity /location were evaluated using the simulation results.
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Katsuaki KOIDE, Shinji TANAKA, Morihisa IIJIMA, Tomoyoshi SHIRAISHI, H ...
2013 Volume 65 Issue 2 Pages
201-204
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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This study is aimed at the development of traffic flow simulations that target road network in Japan. In our previous study, to be under-represented compared with the volume of traffic in the traffic census Status reproducibility was confirmed. In this report, subdivided into "B" zone concentration zones occurrence of vehicle size as this deal, aimed at improving reproducibility current state as a target more than "other road" road network is also finer.
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Shuguang LI, Shigeyuki YAMABE, Yoichi SATO, Takayuki HIRASAWA, Yoshihi ...
2013 Volume 65 Issue 2 Pages
205-210
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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Providing proper advice for the low skilled driver is one effective way to improve drivers'skill. But there are mainly two problems. One is the classifier of high and low skilled drivers. The other is to make clear the difference between two groups. In this paper, we proposed a driving skill analysis method to utilize of data collected by telematics system. A feature extraction technology based on machine learning algorithm is introduced to detect the characteristic difference between high and low skilled drivers and build a classifier. Results of experiments operated on driving simulator show the feasibility of the proposed method.
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Kimihiko NAKANO, Kaechang PARK, Rencheng ZHENG, Fang FANGZ, Masanori O ...
2013 Volume 65 Issue 2 Pages
211-215
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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White matter lesions are small areas of dead cells found in parts of the brain that act as connectors and minor cases are commonly found in the brains of the elder people. An actual vehicle driving experiment was executed to evaluate driving performances of the elderly drivers with and without white matter lesions in the same ages. Before the driving experiment, all of the subjects undertook dynamic vigilance checker (DVC) test, which is a kind of visual cognitive test. During the driving experiment, a calculating task given by voice, namely paced auditory serial addition test (PASAT), was imposed on drivers to examine the effect of the additional task on the driving performance. The results showed that the driver imposed with PASAT made more mistakes than that of the driver without PASAT, and the subject with white matter lesions is easier to be effected than the subjects without white matter lesions.
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Hiroki NAKAMURA, Kimihiko NAKANO, Takeshi HAGIHARA, Hideo OHISHI, Masa ...
2013 Volume 65 Issue 2 Pages
217-221
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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Recently, trajectory geometry of highway construction has been restricted due to higher density of buildings in urban area, and approaching distance is not enough in some convergence sections. To help drivers, development of assistance system in expressway junctions is expected. In this paper,reminder notice and guide beacons are examined to check driving performance along low visibility highway junction. On a test track, low visibility junction is mocked and driving test is carried out with 20 subjects in total to monitor vehicle state variables and driver's grip strength. As a result,driving with guide beacons and reminder notice have shown less stress when subjects approach the junction.
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-Sequence Design ‘Optical Dot System'for Bicycle-
Ayumi HAN, Shintaro ONO, Masato SASAKI, Katsushi IKEUCHI
2013 Volume 65 Issue 2 Pages
223-228
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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This paper reports Experiment for Bicycle Speed Control by Road Marking, “Optical Dot System (ODS)". ODS is developed by Han for improving safety to control speed of vehicle and is installed at the vertical curve section in MEX, Saitama-Omiya line since 2008. As the result, the drivers' autonomous stable speed control, has long-term effects of over the 4years
9). In this experiment, ODS is re-designed on the basis of the cyclist, who has more direct driving braking, slower speed and wider visibility. By ten cyclists as the test subjects, it performed on 100m long section which tested on three type of road marking; ODS -Big and Small, Transversal-line and Plain. As the result, the driving speed has decreased by max. -11km/h and average -7km/h in the section with ODS. In other hand, section of Transversal-line was w/o any speed control effectiveness, same as Plain w/o pattern.
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Kohei SAKUMA, Kimihiko NAKANO, Rencheng ZHENG, Masanori OHORI, Kiyoshi ...
2013 Volume 65 Issue 2 Pages
229-233
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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These days, it is an important issue to reduce the greenhouse gasses. Eco-driving is one of the solutions of the issue; however, the velocity of Eco-driving is low. For truck drivers, the arrival time is determined strictly, so that it is required to cope with both fuel efficiency and travel velocity. In this study, the data of eight professional truck drivers'driving methods measured by driving simulator are shown, and evaluated each driving from the perspective of fuel efficiency and travel velocity. The ideal driving method to cope with both fuel efficiency and travel velocity is shown by this study.
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Rencheng ZHENG, Shitaro ONO, Sungjoon HONG, Kimihiko NAKANO, Shigeyuki ...
2013 Volume 65 Issue 2 Pages
235-239
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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The purpose of this study is to improve the preliminary evaluation of effectiveness of road-traffic safety countermeasure for reformation plan of an actual intersection on National Route 16 in Kashiwa City, Toyofuta Kogyo Danchi Iriguchi Intersection, where traffic accidents of rear-end collision often occur. Utilizing national digital map, traffic scinario for driving simulator (DS) was structured,and driver behaviors were analyzed by DS's experiment based on the different traffic countermeasures. By the studying results, it is validated that preliminary evaluation of road-traffic safety countermeasure is feasible in DS experiment utilizing national digital map.
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Sungjoon HONG, Shigeyuki YAMABE, Shuguang LI, Takashi OGUCH
2013 Volume 65 Issue 2 Pages
241-245
Published: March 01, 2013
Released on J-STAGE: June 19, 2013
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In this study, the lane-change behavior at a lane-closure event was analyzed by driving simulation for the implementation of a dynamic lane operation for JCT merging sections at Route C1 of Tokyo Metropolitan Expressway. Variable message signs (VMS) were evaluated to be helpful for test drivers to change the lane even when the lane-closure event suddenly appeared. However, the hightraffic level significantly affected the lane-change behavior, and speed reduction, even risky driving behavior, was observed. Therefore, it is considered that a driver guidance system that makes drivers change the lane in advance by further study on the content and the installation of the VMS is essential for the implementation of the dynamic lane operation.in automatic platooning experiments.
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