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Abstract

This study proposes a method for verifying vehicle acceleration behaviors using a microscopic traffic simulation model to evaluate traffic CO2 emissions. Although methods for verifying microscopic vehicle motion data such as vehicle positions and speeds have been proposed...Lead moreThis study proposes a method for verifying vehicle acceleration behaviors using a microscopic traffic simulation model to evaluate traffic CO2 emissions. Although methods for verifying microscopic vehicle motion data such as vehicle positions and speeds have been proposed, no method for verifying acceleration behaviors has been well defined. In our study, probe vehicle data from Tokyo's Komazawa-dori. and simulation outputs were classified into four driving modes on the basis of vehicle behavior and investigated by mode. Our findings demonstrate that differences in acceleration behavior between probe vehicle data and simulation outputs influence CO2 emission quantities.

Abstract

In Europe, US, Japan there has been increased activity to develop driver assistance systems that utilize wireless communication between vehicle and surroundings (V2X communication). Under such projects experiments to verify effectiveness in real road situations are moving...Lead moreIn Europe, US, Japan there has been increased activity to develop driver assistance systems that utilize wireless communication between vehicle and surroundings (V2X communication). Under such projects experiments to verify effectiveness in real road situations are moving to the next stage of deployment. Deployment by vehicle manufacturers is main focus but older model vehicles present special challenges that may necessitate after-market or third-party devices. In this paper we evaluate Human Machine Interface(HMI) to obtain maximum safety effect, as well as find device position relating to after-market/preinstalled systems. Results of V2X driving support experiments using such HMI in real world situation are analyzed to determine best practice as related to services such as pedestrian collision avoidance and other high priority accident scenarios. Driver questionnaire employed to find market acceptance. Finally comparison with ideal HMI is done to verify level of safety achieved.

Abstract

Big data shows great promise to provide deep insights and create tremendous new value for many different uses. However, in order to realize this promise, important obstacles must be overcome. Often, Big data is noisy and inconsistent. Privacy and confidentiality must be a...Lead moreBig data shows great promise to provide deep insights and create tremendous new value for many different uses. However, in order to realize this promise, important obstacles must be overcome. Often, Big data is noisy and inconsistent. Privacy and confidentiality must be assured. Data from different sources must be integrated, and deep analytics must be applied to drive business value. In this paper, an ITS common platform to transform uncertain Big data into valuable data by integrating several intelligences such as a streaming process with embedded analytics, an automated ETL (Extract, Transform and Load) process to create application specific data marts with privacy preservation technologies, and interfaces to access the platform is discussed.

Abstract

This study seeks to acquire knowledge that leads to assessments of the effects of introducing bus operation services by examining its relation to the frequency of bus operation and bus route characteristics or the relation to external factors such as bus operation status ...Lead moreThis study seeks to acquire knowledge that leads to assessments of the effects of introducing bus operation services by examining its relation to the frequency of bus operation and bus route characteristics or the relation to external factors such as bus operation status and the number of bus users. This analysis uses access log data of tobus.jp, Toei bus operation information service, the usage history information from the bus IC card data and bus operation information accumulated in the Toei bus operation management system. Conducting comparative analyses with the number of people who accessed the home page, the number of IC card bus rides, and bus location data, this study examined the relation between information provided and bus usage.

Abstract

We implemented the electricity measuring system and electricity information visualizing system in one household about for 1 year. The measuring system is measuring real-time electricity data by using smart meters every 5 minutes, the web-based visualizing system is provid...Lead moreWe implemented the electricity measuring system and electricity information visualizing system in one household about for 1 year. The measuring system is measuring real-time electricity data by using smart meters every 5 minutes, the web-based visualizing system is providing information, how much electricity used for EV charging, generated by PV at real-time. The user can choose their next behavior by the system. To evaluate how information can contribute the behavior change if two systems implemented in the whole local village for building low carbon city, we proposes ITS and electricity information platform in this paper.

Abstract

Under ATMS, pre-timed signal control still plays an important role in traffic control and management. This research applies a randomized meta-heuristic algorithm, greedy randomized tabu search, for network-level signal optimization problems. The algorithm can be a systema...Lead moreUnder ATMS, pre-timed signal control still plays an important role in traffic control and management. This research applies a randomized meta-heuristic algorithm, greedy randomized tabu search, for network-level signal optimization problems. The algorithm can be a systematic approach for decision-making of traffic signal strategies to improve network performance.
However, how to accurately evaluate the proposed algorithm is an issue in this paper. Meta heuristic algorithms start searching procedure with generation a set of solution/s in the first iteration. Then simulation model of the considered problems is called and the fitness function is calculated for each individual to evaluate the goodness of such solution.
In order to compare the performance of GRTS with other algorithms/approaches, Genetic algorithm and two signal optimization softwares are chosen to generate optimal signal strategies. A novel comparison criterion which is independent of computer capability and computational time is proposed and appropriate numerical comparisons are performed.

Abstract

Various routing functions have been suggested but the driver was not completely satisfied with these routes. Therefore, we propose a new route which satisfies most of the drivers.
We created a model of driver's own choice of route by the multinomial logit model and ge...Lead moreVarious routing functions have been suggested but the driver was not completely satisfied with these routes. Therefore, we propose a new route which satisfies most of the drivers.
We created a model of driver's own choice of route by the multinomial logit model and generated a new routing called "Smart Routing" based on this model.
By this "Smart Routing", we were able to obtain a new route that can provide a better user experience to the drivers.

Abstract

Nagasaki LRT Navigation Promotion Council provides the Service named DOKONE. It is a system that distributes the position information of the low-floor vehicle operated by Nagasaki Electric Tramway to the mobile terminal. This system detects tram and user's positions by us...Lead moreNagasaki LRT Navigation Promotion Council provides the Service named DOKONE. It is a system that distributes the position information of the low-floor vehicle operated by Nagasaki Electric Tramway to the mobile terminal. This system detects tram and user's positions by using GPS, and transmits data via mobile network (3G or LTE). Users can determine the position of the tram by the map displayed on the screen of the mobile phone. In addition, they can reserve getting on from a specific stop. This service started in October, 2011, and reached 40,000 by the number of accesses in one year. Our Promotion Council is composed by the university, private companies, and local governments (City and Prefecture). We developed a new navigation system for sightseeing that used Ucode and the NFC tag based on DOKONE in 2012. This article reports on the process of the evolution of the navigator.

Abstract

Road traffic noise is one of serious impacts which are generated from road network. In order to keep moderate sound environment in crowded and busy cities, noise mitigation measures are important. In Japan, advanced noise control technologies have been developed on basis ...Lead moreRoad traffic noise is one of serious impacts which are generated from road network. In order to keep moderate sound environment in crowded and busy cities, noise mitigation measures are important. In Japan, advanced noise control technologies have been developed on basis of experience of serious pollution issues in 1960s and 1970s. In this report, noise control technologies developing in Japan is firstly described and advanced researches on noise reduction and noise prediction against road traffic were introduced.

Abstract

The 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 ...Lead moreThe 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 scenario 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.

Abstract

Smart Highway project started in 2008 and test site for project has performed since 2011. In this study, introduce that test site building status and utilization of test site. Test-site located Yeoju test road(7.7km / 2lanes) on Central Inland Highway. It is installed tha...Lead moreSmart Highway project started in 2008 and test site for project has performed since 2011. In this study, introduce that test site building status and utilization of test site. Test-site located Yeoju test road(7.7km / 2lanes) on Central Inland Highway. It is installed that public infrastructure & communication network & operation center. Also, The project was installed exhibit room for constantly to promote project output in 2012. Test site utilized pilot test and field operation test. In 2011, it conducted first demonstration for promote to understand of project output, and it utilized successful second demonstration. In this study checked that utilization of test site can improve the performance of project output and potential of spread. Also, it was checked need of expansion of test site for was planned large-scale demonstrations for people and a 24-hour operation.

Abstract

The rate of elderly people in Kitakyushu City where we live has reached a very high level, We have been studying the possibility of ensuring the safety mobility for elderly people by combining ultra small electric vehicle with vehicle embedded ITS technology and infrastru...Lead moreThe rate of elderly people in Kitakyushu City where we live has reached a very high level, We have been studying the possibility of ensuring the safety mobility for elderly people by combining ultra small electric vehicle with vehicle embedded ITS technology and infrastructure technology.For this purpose, "Study Group for Autonomous Driving in Kyushu" is established. And the research progresses are listed below.
(1)Investigations on the acceptability of introduction of sEV in the district according to the related news ,(2)Development of sEV as suitable means of transportation for the elderly people,(3)Actual experiments of sEV in the actual areas
In order to put the small EV in to actual use, we are also aiming at developing a system with functions of low price safety support, convenient moving to public facilities like hospitals, tourist guidance and so on.

Abstract

In Energy-Saving ITS Technology Project of Japan, a reliable automatic platooning of trucks is a main objective in highway transportation. The application of a driving simulator is useful to evaluate driving safety of the automatic platooning, and thus a new truck driving...Lead moreIn Energy-Saving ITS Technology Project of Japan, a reliable automatic platooning of trucks is a main objective in highway transportation. The application of a driving simulator is useful to evaluate driving safety of the automatic platooning, and thus a new truck driving simulator was constructed to reproduce truck dynamics and control. A full-scale cabin of truck was integrated into the driving simulator. And a gap distance controller for longitudinal and lateral directions was designed for the automatic platooning. On the assumption of system failures in the processes of formation and separation of the automatic platooning, driver behaviors for the emergency avoidance in a following truck were studied in the driving experiment using the truck driving simulator.

Abstract

In recent years, the Ministry of Transportation and Communications (MOTC), R.O.C., has promoted the development of public transportation throughout the country. The MOTC has assisted local governments in upgrading regional public transportation systems to achieve seamless...Lead moreIn recent years, the Ministry of Transportation and Communications (MOTC), R.O.C., has promoted the development of public transportation throughout the country. The MOTC has assisted local governments in upgrading regional public transportation systems to achieve seamless transportation regarding the aspects of space, time, information, and service. The conditions of public roads and transportation services and the influence that operating plans have on transportation accessibility must be understood to achieve this goal. In this study, we applied the spatial analysis function of Geographic Information Systems (GIS) to analyze the benefits of various seamless service assessment indicators for public transportation services within and outside various administrative areas. We also analyzed the benefits provided by the revision and evaluation of public transportation operating plans (such as the addition of routes and adjustment of routes and rescheduling of the timetable). Finally, we analyzed the influence that the added routes had on accessibility.

Abstract

In Japan, as part of ITS, research, development, and deployment of UTMS (Universal Traffic Management System) have been promoted for the purpose of environment preservation, safety support, and reducing traffic jams. Communications of between infrastructure and vehicle (I...Lead moreIn Japan, as part of ITS, research, development, and deployment of UTMS (Universal Traffic Management System) have been promoted for the purpose of environment preservation, safety support, and reducing traffic jams. Communications of between infrastructure and vehicle (I2V/V2I) and between infrastructures (I2I) can greatly contribute to improve applications of UTMS. As one of the candidates of the means, we are now considering and studying to use 700MHz radio for them. In this paper, we report about our research and development in the practical use of the service with the wireless communication of 700MHz-band between vehicles (V2V), I2V/V2I and I2I with focus on I2I communications especially for enhancing traffic signal control technology.

Abstract

There is an increasing demand for reliability and improvement of traffic information as the ITS is built across Korea, and for schemes for improving traffic services and traffic safety. In particular, there is a demand for developing a performance evaluation system to ens...Lead moreThere is an increasing demand for reliability and improvement of traffic information as the ITS is built across Korea, and for schemes for improving traffic services and traffic safety. In particular, there is a demand for developing a performance evaluation system to ensure reliability and to build and install a stable system for ITS equipment which has a direct impact on traffic information quality, convenient traffic services, and traffic safety. In this study, we describe details of performance evaluation and test/inspection for each field to be useful for the fields which need more details for performance evaluation and test.

Abstract

Freeway Traffic Management System (FTMS) was introduced by Korean Expressway Corporation in 1993. Since then, Korean Expressway Corporation has been promoted to build system consistently and to extend service.
Recent domestic and international ITS-related projects are...Lead moreFreeway Traffic Management System (FTMS) was introduced by Korean Expressway Corporation in 1993. Since then, Korean Expressway Corporation has been promoted to build system consistently and to extend service.
Recent domestic and international ITS-related projects are developing the cooperative ITS system between vehicle and infrastructure or between vehicle and vehicle by using the wireless communication, and 'National ITS Master Plan 2020' was established that was proposed direction of ITS next 10 years in Korea. Accordingly, Korean expressway ITS services need review to be in harmony to changes in technology and national policy.
we were established vision and goals basis on safety, efficiency and convenience, and we had drawn 21 services for 'Expressway ITS Master Plan' in Korea.

Abstract

A cooperative adaptive cruise control (CACC) system enables shorter gaps and tighter control of gaps using vehicle-vehicle communication, and the CACC system has significant positive effects on traffic flow in highway system. The study is about an applicable evaluation of...Lead moreA cooperative adaptive cruise control (CACC) system enables shorter gaps and tighter control of gaps using vehicle-vehicle communication, and the CACC system has significant positive effects on traffic flow in highway system. The study is about an applicable evaluation of human machine interface (HMI) for CACC of trucks using a truck driving simulator (DS) system. A novel truck DS was constructed to reproduce truck dynamics and control by integrating a full-scale cabin of truck into a universal DS system. And a gap distance controller for longitudinal and lateral directions was designed to realize the CACC of trucks. A HMI system prepared for the actual-vehicle CACC driving was used for examine the driver's acceptance, which is mainly about whether the HMI help driver to realize safe and comfortable CACC driving when the HMI system real-time provides the advanced information service.

Abstract

To mitigate the traffic congestion at merging sections of two routes in unban expressway networks, a dynamic lane operation has been being studied in Japan, which allocates one lane to either approach of a merging section dynamically. Although the effect has been evaluate...Lead moreTo mitigate the traffic congestion at merging sections of two routes in unban expressway networks, a dynamic lane operation has been being studied in Japan, which allocates one lane to either approach of a merging section dynamically. Although the effect has been evaluated positively, the method involves a lane closure at either approach, and the risky lane-change behavior at the approach where one lane is decreased has not been studied. In this study, the lane-change behavior when one lane is closed by a variable barrier which is informed by a variable message sign (VMS) is analyzed by driving simulation experiment considering the implementation of the dynamic lane operation for merging sections at Route C1 of Tokyo Metropolitan Expressway. Traffic condition and the distance between a lane-closure point and a VMS are considered as critical factors affecting the risky behavior, and their influence on the lane-change behavior is studied.

Abstract

In Japan infrared beacons have been widely installed since early 1990s with approximately 54,000 units on arterial roads. Through the two-way communication between infrared beacons and vehicles equipped with onboard units, Traffic Control Center collects information such ...Lead moreIn Japan infrared beacons have been widely installed since early 1990s with approximately 54,000 units on arterial roads. Through the two-way communication between infrared beacons and vehicles equipped with onboard units, Traffic Control Center collects information such as vehicle identification numbers and travel time. The information is called uplink data and is expected to contribute to research and development of traffic management. However, studies on the status of collection and practical application of it have been quite few. In this paper, we examine the statistics of collecting uplink data for long periods. Moreover, we validate travel time estimated from this data.

Abstract

The Hanshin Expressway Company Limited (HECL) operates urban expressway network in Kansai region and recognizes traffic safety as one of the most important missions. And the HECL launched a new countermeasure to directly support drivers to enhance safe driving, because th...Lead moreThe Hanshin Expressway Company Limited (HECL) operates urban expressway network in Kansai region and recognizes traffic safety as one of the most important missions. And the HECL launched a new countermeasure to directly support drivers to enhance safe driving, because the HECL becomes possible to provide many users the newest fine information for their safe driving through the information services by car navigation equipment or smartphones, provided by private sector.
And then, the HECL built the scheme of the project, providing the information service, by using "Road Section Identification Date set" (RSIDs), by public-private initiative and specified the format of the information service.
Through the activity for three years, the HECL would aim at utilization of the advanced informational service such as precaution for each lane, powered by using RSIDs and the large-scale road map (the fundamental geospatial data of road) to support safe driving.

Abstract

Recently application of probe data to traffic management has attracted attention of traffic researchers. This paper describes the possibility of making use of probe data for traffic signal control on a local road without vehicle detectors. We conducted a field experiment ...Lead moreRecently application of probe data to traffic management has attracted attention of traffic researchers. This paper describes the possibility of making use of probe data for traffic signal control on a local road without vehicle detectors. We conducted a field experiment on a local route in the city of Yokohama to validate our previous work verified by only simulation tests. The experimental results show that the improved signal control parameters can successfully lessen the queue length and carbon dioxide emissions. We conclude that probe data can be applied to offline signal control.

Abstract

Since the number of pedestrians killed in traffic accidents is large in Japan, Toyota is developing vehicle-infrastructure cooperative systems (V2ISs) to detect pedestrians via road side sensors, where these could otherwise be overlooked easily. This paper specifically ad...Lead moreSince the number of pedestrians killed in traffic accidents is large in Japan, Toyota is developing vehicle-infrastructure cooperative systems (V2ISs) to detect pedestrians via road side sensors, where these could otherwise be overlooked easily. This paper specifically addresses accidents occurring during left turns. In a first step, the necessity for a left-turn-specific system was analyzed based on accident statistics, and it was found that such a system is desirable as left-turn accidents are most frequent leaving aside accident types for which V2ISs have been already developed. In a second step, the accident reduction effect of the Left Side Crossing Pedestrian Recognition Enhancement System (LSPS), a V2IS, was evaluated, and it was found that, since late noticing of pedestrians is a major cause of accidents, the system will have an effect on accident reduction. Finally, a field test was conducted, which confirmed the effectiveness of the LSPS.

Abstract

The majority of traffic accidents are caused by driver's drowsiness. In the previous study, detection of drowsiness level based on physiological signals or facial features from driver monitoring camera have been suggested. However, drowsiness level detection accuracy is n...Lead moreThe majority of traffic accidents are caused by driver's drowsiness. In the previous study, detection of drowsiness level based on physiological signals or facial features from driver monitoring camera have been suggested. However, drowsiness level detection accuracy is not enough by these method. This study therefore proposed the estimation of driver's drowsiness level considering gradual change in the arousal state by ECG, breath information, facial features and seat pressure. Through the performance validation of proposal method during the experiment using the driving simulator, we obtained high accuracy and high relation for estimation of drowsiness level.

Abstract

In Japan, widely deployed traffic signal control methods, aiming to relieve congestion, calculate control parameters based on traffic volume and occupancy rates. In signal control, travel time and delay time are thought to be desirable performance indexes. Nevertheless th...Lead moreIn Japan, widely deployed traffic signal control methods, aiming to relieve congestion, calculate control parameters based on traffic volume and occupancy rates. In signal control, travel time and delay time are thought to be desirable performance indexes. Nevertheless these methods adopt other indexes in the calculation of control parameters. Thus it has been pointed out that reduction of travel time and delay time is not necessarily guaranteed in the operation of these methods. To solve the drawback, we proposed a new control method which is set target travel time for a target route and attempt to realize the time. Our method determines signal control parameters on the basis of the travel time estimated with a traffic flow model. We conducted a simulation experiment and field experiment using the proposed method on a national road in Chiba Prefecture to validate the effectiveness of the proposed method.

Abstract

Toyota, in cooperation with the UTMS Society of Japan is conducting a field study on a system that helps to prevent collisions during right turns and a system that helps to not overlook crossing pedestrians in order to evaluate the effects of both systems. Until now resul...Lead moreToyota, in cooperation with the UTMS Society of Japan is conducting a field study on a system that helps to prevent collisions during right turns and a system that helps to not overlook crossing pedestrians in order to evaluate the effects of both systems. Until now results have been obtained from driving simulators or in a field study of limited scope, however have not yet been quantified in a generalized manner. To obtain first quantitative results for a real-world environment, we therefore implemented the necessary infrastructure at several intersections in Toyota City (Aichi Prefecture) and are currently carrying out a monitor experiment, where citizens were asked to use the system in their daily lives. The field study confirmed that the system is effective in reducing accidents caused by a lack of safety confirmation by drivers.

Abstract

Rear-end collisions account for a large percentage of traffic accidents. When a passenger car is hit from behind by a larger automobile such as a bus or truck, the damage can be severe. Many technological attempts, including pre-crash safety systems, have been made to red...Lead moreRear-end collisions account for a large percentage of traffic accidents. When a passenger car is hit from behind by a larger automobile such as a bus or truck, the damage can be severe. Many technological attempts, including pre-crash safety systems, have been made to reduce the number of collisions and minimize the damage they cause. Higher awareness about driving safety has led to calls for pre-crash safety systems installed not only on passenger cars but on buses and trucks. Recent radar technology plays an important role in the solutions, including its application in developing emergency braking systems and dummy cars. We have developed an imaging radar system to facilitate testing and evaluation of how well a radar under test performs in detecting, for example, a lead vehicle or a pedestrian crossing the street. This imaging radar also helps in analyzing the intensity of reflected waves to improve emergency braking systems.

Abstract

Urban transportation planning needs clarification of the actual traffic demand in the whole city. A probe-car can effectively collect data on traffic condition of roads where existing detectors are not installed. The probe-car detects the travel time, but it does not meas...Lead moreUrban transportation planning needs clarification of the actual traffic demand in the whole city. A probe-car can effectively collect data on traffic condition of roads where existing detectors are not installed. The probe-car detects the travel time, but it does not measure the traffic volume on the road directly. Therefore, a traffic volume estimation method using probe-car data is expected to find out the traffic volume of all roads in a city. This paper describes a traffic volume estimation method using speed-density-flow models and the probe-car data. The models are calculated on some representative roads and the traffic volumes of the road on which traffic volume cannot be observed directly are estimated using the model of similar road feature. We evaluated the estimated accuracy of the method, and we obtained the prospect that the method can estimate the traffic volume with an approximately 30% average error rate.

Abstract

Understanding driver’s aggressiveness can be useful for many aspects ranging from negotiating insurance premium to determining appropriate perception-reaction time for driver specific warnings. Most studies have used (i) survey questionnaires asking crash experience, cita...Lead moreUnderstanding driver’s aggressiveness can be useful for many aspects ranging from negotiating insurance premium to determining appropriate perception-reaction time for driver specific warnings. Most studies have used (i) survey questionnaires asking crash experience, citations, and driving behaviors, and/or (ii) analyzed individual vehicular data such as maximum deceleration rate and highest speed. This study proposed a new index that captures drivers’ aggressiveness based on inter-vehicular dynamics data. Proposed index based on the time-to-collision and deceleration rate difference was applied to real world vehicular dynamics data obtained from drivers participated in driving tests. Proposed index clearly showed that younger female drivers were the most aggressive and followed by younger male drivers. Responses of survey questionnaire data from the participants were compared with proposed index. Results indicated that the index does not appear to match well with some drivers, implying that questionnaire responses might not be the best indicator for capturing drivers’ aggressiveness.

Abstract

This paper describes a system that informs drivers on road work sites by means of wireless information transmission from vehicles displaying road work signs and road workers. It further outlines the results of an evaluation of the driver's acceptance of the service. Betwe...Lead moreThis paper describes a system that informs drivers on road work sites by means of wireless information transmission from vehicles displaying road work signs and road workers. It further outlines the results of an evaluation of the driver's acceptance of the service. Between 2008 and 2010 there were 30 fatalities and severe accidents involving road workers on Japanese highways. These accidents mainly occurred because drivers did not notice a road work site. The reason for not noticing the road work site on a straight road was found to be a lack of carefulness in street observation in more than half of all cases. In order to address this, we have developed a system that prevents overlooking road work sites and road workers by informing drivers some hundred meters in advance on the presence of such sites via wireless information transfer.

Abstract

Highways running in the suburban areas in Japan have a common method of charging, which
is based on the distance the vehicle has traveled. However, in urban areas, there is no land to
construct tollgates and may adopt a uniform rate system. In this case, feelings of...Lead moreHighways running in the suburban areas in Japan have a common method of charging, which
is based on the distance the vehicle has traveled. However, in urban areas, there is no land to
construct tollgates and may adopt a uniform rate system. In this case, feelings of inequality
arise to the user. To remedy this issue, the flexible fee collection system using a free flow
antenna is operated on thru lanes and exit ramps. However, compared with the radio system
installed at tollgates, the rate of incidence of abnormalities in communication is high.We have
performed examinations on the installation method of a free flow antenna that will reduce the
rate of abnormalities, paying attention to ease of use in the actual operation.

Abstract

An accident against pedestrian occurs frequently so that there are many intersections with poor possibility in residential area especially. Therefore more consideration to reduce pedestrian accidents is required.
This system consists of three systems, smartphone(pe...Lead more An accident against pedestrian occurs frequently so that there are many intersections with poor possibility in residential area especially. Therefore more consideration to reduce pedestrian accidents is required.
This system consists of three systems, smartphone(pedestrian side), center server, and navigation system or smartphone(vehicle side), and drivers can know the existence of the pedestrian through the navigation system or smartphone on vehicle before their detecting. The communication network linking each system is planned high speed communication such as 3G or LTE.

Abstract

Electronic toll collection (ETC) in Japan is introduced to tollgates located where the space is narrow. Therefore, it is important to reduce unnecessary reflection from surrounding concrete structures for DSRC communication, including that for ETC at tollgates or in tunne...Lead moreElectronic toll collection (ETC) in Japan is introduced to tollgates located where the space is narrow. Therefore, it is important to reduce unnecessary reflection from surrounding concrete structures for DSRC communication, including that for ETC at tollgates or in tunnels which
are also surrounded by concrete structures. A microwave absorber is used to reduce the wave
reflection at the canopy of tollgates. It is necessary to use a lift truck to measure the absorber performance at the canopy. However, this operation is very troublesome. To simplify the operation, we proposed a new measurement system that uses a metal-plate lens antenna
installed on the ground. This makes the measurement operation safe, not having to use a lift truck.

Abstract

Detection of road surface conditions is very critical issue for safe driving in winter. Due to snow and ice, cars' stopping distance becomes considerably longer than under dry condition. This paper proposes a method to detect road surface conditions in winter by using ima...Lead moreDetection of road surface conditions is very critical issue for safe driving in winter. Due to snow and ice, cars' stopping distance becomes considerably longer than under dry condition. This paper proposes a method to detect road surface conditions in winter by using images acquired through CCTV cameras on the roads. This method can be widely applied for public highway by using existing infrastructure. The method can detect road surface conditions based on texture features and the Mahalanobis distance. It was concluded that road surface conditions can be detected using images acquired through CCTV cameras at both daytime and night-time.

Abstract

For testing radar-based safety systems, we have developed an indoor system that simulates the multilane driving behavior of multiple lead vehicles, including slowing down, accelerating, and changing lanes. The original model was designed for 76.5 GHz radar, but support fo...Lead moreFor testing radar-based safety systems, we have developed an indoor system that simulates the multilane driving behavior of multiple lead vehicles, including slowing down, accelerating, and changing lanes. The original model was designed for 76.5 GHz radar, but support for 24 GHz and 79 GHz radars was added in subsequent models. This 3 m by 3 m compact system can easily be installed in a typical 10 m by 10 m room.

Abstract

Recently, bus location systems aimed at improvement of bus user's convenience are drawing attention. Many existing systems use cellular network for sending current bus location information to a management server and delivering bus operation information to bus stops. There...Lead moreRecently, bus location systems aimed at improvement of bus user's convenience are drawing attention. Many existing systems use cellular network for sending current bus location information to a management server and delivering bus operation information to bus stops. Therefore, it is difficult to keep operating system of community bus because of high communication costs in Japan. In this paper, we propose a novel bus location system using wireless sensor network without community cost. In the proposed system, the wireless sensor network is constructed with IEEE802.15.4-compliant sensor devices that are installed in buses, bus stops and street along the bus routes. We have developed the prototype system and verified the behavior. It was confirmed that bus location information could be collect only by a wireless sensor network without a cellular network in actual environment.

Abstract

Nexco-Central aims for giving the safe, secure and comfortable express way to drivers. We have been working on many projects. This is one of our new projects: We developed the new vehicle for giving drivers the clean road to keep them safe. It can remove about 90% falling...Lead moreNexco-Central aims for giving the safe, secure and comfortable express way to drivers. We have been working on many projects. This is one of our new projects: We developed the new vehicle for giving drivers the clean road to keep them safe. It can remove about 90% falling objects like stones, rocks and large vehicle's tires which will turn to be some dangerous factors. Last year we developed the new vehicle. We called it, NRCV. And we were going to improve and downsize. We report this development project with the results of the test.

Abstract

The entire information system of i3 Travel is planned; the travel and visiting information service is planned and established; subjects related to public transportation, parking management and low-carbon tourism services are discussed; and the Sun-Moon Lake national sceni...Lead moreThe entire information system of i3 Travel is planned; the travel and visiting information service is planned and established; subjects related to public transportation, parking management and low-carbon tourism services are discussed; and the Sun-Moon Lake national scenic area is taken as the demonstration object used as reference for domestic visiting recreation areas subsequently importing ITS and Telematics.

Abstract

This paper proposes a way to estimate quantitatively the time when a driver reaches critical drowsiness level. We use the driver's heart rate variability and eyelid closure 60 seconds after start of driving. Our estimation method is multiple linear regression analysis, an...Lead moreThis paper proposes a way to estimate quantitatively the time when a driver reaches critical drowsiness level. We use the driver's heart rate variability and eyelid closure 60 seconds after start of driving. Our estimation method is multiple linear regression analysis, and we compare the estimated time to reach critical drowsiness level by each driver to the actually measured one. The results showed that the coefficient of correlation was 0.856. Therefore, our proposed method demonstrated the possibility to estimate quantitatively the time required by each driver to reach a critical or risky drowsiness level.

Abstract

The authors are developing a mesoscopic CO2 emission model to estimate the effect of ITS measures. Driving behavior needs to be considered when calculating the reduction of CO2 emission of ITS measures. However, mesoscopic traffic simulation models cannot expressly proces...Lead moreThe authors are developing a mesoscopic CO2 emission model to estimate the effect of ITS measures. Driving behavior needs to be considered when calculating the reduction of CO2 emission of ITS measures. However, mesoscopic traffic simulation models cannot expressly process driving behavior. Three options to consider driving behavior change in a mesoscopic CO2 emission model are suggested. The accuracy of Option 3 (designed running pattern method) is validated using the result of field tests for a normal driving case and an e-start driving case (e-start driving is starting and acceleration to achieve 20km/h in 5 seconds). The authors confirmed that the result of field tests and the result calculated by the mesoscopic CO2 emission model have similar trends.