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Abstract

Popularization of private automobile leads the economic growth. But it has caused congestion and emissions in urbanized area. This study suggested scientific methods of analyzing user’s empirical cognition on traffic mode by examining TMV(Transport Mode Value). The concep...Lead morePopularization of private automobile leads the economic growth. But it has caused congestion and emissions in urbanized area. This study suggested scientific methods of analyzing user’s empirical cognition on traffic mode by examining TMV(Transport Mode Value). The concept of TMV defines as the ratio of transport service that users acquire to cost that they pay. The analysis frame is developed by considering customer value and service quality (SERVQUAL) model. TMV is divided into expected value and perceived value, and evaluated by SERVQUAL model. The analysis of TMV indicates that the auto value score is 4.8 times higher than transit value. Path analysis shows that the higher auto value leads the less pressure of gas price and the more will of auto use. Various policy alternatives for modal shift have been made to realize of sustainable transport. But the auto’s mode share has increased mainly due to ignorance in policies about auto value. Sustainable transport strategy should be started with investigating TMV to enhance the efficiency of transportation systems. The TMV survey methods and results could be applied to a decision making system, reducing traffic congestion and decreasing transport-related emissions.

Abstract

The traffic operation techniques recently have been focusing on safety and mobility. There are more than one way to solve in these focus. That is a facility expansion. But, that's a stiff price and limit to construct it. This study presents finding of an effect for Variab...Lead moreThe traffic operation techniques recently have been focusing on safety and mobility. There are more than one way to solve in these focus. That is a facility expansion. But, that's a stiff price and limit to construct it. This study presents finding of an effect for Variable Speed Limit focusing on safety and mobility. The Variable Speed Limits control is very effectives allow for these weak a point on the traffic flows. The existing theories were studied activities in the 2000s. But it needed to be a study that was based on the Traffic Flow Theory. This study is regard to the Traffic Flow Theory and the Supply Demand Method of the Cell Transmission Model traffic theory. As a result, the VSL control model based on the Cell Transmission Model was correspond to the Graphical Solution and the results of a VISSIM analysis. In addition, by the MOE analysis, VSL control is very effective in reducing the travel time of traffic flows.

Abstract

During the last decade, Korea has developed various types of road traffic information systems for providing real-time roadway conditions including travel time, average speed, and incidents etc. Recently, emerging concept of ubiquitous computing by Mark Weiser has initiate...Lead moreDuring the last decade, Korea has developed various types of road traffic information systems for providing real-time roadway conditions including travel time, average speed, and incidents etc. Recently, emerging concept of ubiquitous computing by Mark Weiser has initiated new era of traffic information environment so called, 'ubiquitous Transportation'. Under the circumstances, it is expected that seamless traffic information regardless of the roadway types should be supplied to the every drivers any time and any where. It is well known fact that integration of existing traffic information system is a crucial prerequisite for the successful implementation of the u-transportation environment. In this context, the purpose of the study is to establish the integrating strategies of traffic information systems by developing evaluation model for level of integration and providing both short and long term feasible policies. Firstly, the study has established a fundamental concept of the nation-wide integrated traffic information system. Secondly, the study has developed a evaluation model for diagnosing of existing systems' integration level. Thirdly, using the UISI, `the national highway traffic information system that has four prefectural regions; Seoul, Iksan, Busan and Daejeon has been evaluated. Lastly, the study proposed both short and long term strategies for accomplishing the integration of traffic information systems and especially emphasized on the importance of cooperation both private and public sector and among the related ministries in the Korean government.

Abstract

The Vehicular Ad-hoc Network (VANET) has two main problems due to high mobility and frequently changing network topology and density: one is short link duration time and the other is high packet error rate (PER). Both theoretical analysis and experiment results have verif...Lead moreThe Vehicular Ad-hoc Network (VANET) has two main problems due to high mobility and frequently changing network topology and density: one is short link duration time and the other is high packet error rate (PER). Both theoretical analysis and experiment results have verified that the indoor wireless communication technologies are unable to achieve optimized and robust performance when applied to vehicular communication environments. Moreover, Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) communication messages must be transmitted in order to provide not only various services but also cooperative driving services with low PER. In this paper, we brief the design of adequate WAVE MAC Scheduler (AWMS) that considers both stable link setup and low packet loss rate in VANET. The AWSM consist of data plane service and management plane service part.

Abstract

Starting with the ITS construction project of 1997 for the national highway (National Highway No. 3, Seongnam~Ichon) in Southern part of the Seoul Metropolitan Area, Ministry of Land, Transport and Maritime Affairs started to lay the foundation for the project to make gen...Lead moreStarting with the ITS construction project of 1997 for the national highway (National Highway No. 3, Seongnam~Ichon) in Southern part of the Seoul Metropolitan Area, Ministry of Land, Transport and Maritime Affairs started to lay the foundation for the project to make general national highways all over Korea intelligent. With continuous facility expansion, supplemental S/W and accumulation of operation technology that followed, National Highway ITS is being operated for 2,418km as of December, 2009. National Highway ITS plays a pivotal role in improving effects like directly and indirectly increasing the capacity, decreasing traffic accidents, reducing travel time and reducing environmental pollution in national highways through a process in which various traffic information that occur on national highways are collected, processed and provided. ITS network must be expanded further in the short term to maximize the efficiency of the road network and to provide a convenient traffic service which is the goal that the National Highway ITS project is pursuing. Information for a fixed section or fragmented information simply provide traffic information. They cannot guide drivers who have recognized the information toward a certain direction or provide a path selection service. Therefore, while various routes can be examined as target sections for expanded construction, it is desirable to expand the National Highway ITS System by starting with national expressway bypass roads for which significant effects are expected in the ITS project and then continuing on to principal roads in the metropolitan areas of large cities and national highways linked to principal roads. Ultimately, a traffic information network must be constructed in phases through the ITS system that is connected to bypass national highways of all 7×9 national expressways and key traffic hubs of the five major regional metropolitan areas. The most important factor that must be considered when selecting the target section to expand the National Highway ITS Network in phases is network connectivity. Rather than selecting a section simply because it is a congested section or since an ITS effect is expected, it is desirable to expand the system in phases by considering the overall connectivity or future expandability of the network. In addition, general national highways have a network characteristic that is completely different from national expressways. While national expressways form a linear network that restricts entering and exiting, general national highways form a area centered network for each region since entering or exiting can be done freely by using national expressways or local roads. Since the National Highway Traffic Management System (NHTMS) must also be connected to the Urban Traffic Management System (UTMS) that is being promoted by each local government like the state of the art traffic model city, target section must be selected by considering the ITS plan or projects of the local governments.

Abstract

Lane Control strategies are used to provide information regarding impending lane-specific traffic conditions that helps drivers change lanes efficiently. It is for improvement the safety as well as maximization the capacity especially in the case of freeway lane closures ...Lead moreLane Control strategies are used to provide information regarding impending lane-specific traffic conditions that helps drivers change lanes efficiently. It is for improvement the safety as well as maximization the capacity especially in the case of freeway lane closures by smooth lane changing. Some examples of lane control application have been done in other countries such as China, Germany and UK, but there are few cases and studies in Korea. This study is aimed to evaluate the effectiveness of LCS theoretically and develop the multiple lane-merging model based on dynamic traffic flow condition in highway. This paper is focused on optimized model between maximizing throughput and minimizing queue length and presents the effectiveness of this model through some microscopic-simulation examples. The findings will help the evaluation of highway ITS deployment project.

Abstract

Grasp a lot of situations such as a tunnel fire, accidents and stagnation etc. automatically as I utilize a closed circuit television image in a tunnel, A tunnel manager is correct by the most advanced automatic watch in the watches that are the existing passive enemy, an...Lead moreGrasp a lot of situations such as a tunnel fire, accidents and stagnation etc. automatically as I utilize a closed circuit television image in a tunnel, A tunnel manager is correct by the most advanced automatic watch in the watches that are the existing passive enemy, and is efficient is a protection against disasters system so as to be able to monitor it.

Abstract

Through the design and construction of Bimodal Tram test track is performed, it is possible to acquire the know-how about the operation of Bimodal Tram system and establish the system applicable to any characteristics of the city in the future.Through the design and construction of Bimodal Tram test track is performed, it is possible to acquire the know-how about the operation of Bimodal Tram system and establish the system applicable to any characteristics of the city in the future.

Abstract

Tunnel Traffic Management System refers to information and communication facilities like the traffic system for managing traffic inside a tunnel, broadcasting system for providing service like radio broadcasting inside the tunnel and emergency broadcasting and communicati...Lead moreTunnel Traffic Management System refers to information and communication facilities like the traffic system for managing traffic inside a tunnel, broadcasting system for providing service like radio broadcasting inside the tunnel and emergency broadcasting and communication system consisting of mobile communication using radio waves and relay system for wireless communication. It is an element that makes up the tunnel disaster prevention facility and it is installed in parallel with electric power, firefighting and automatic control facilities.

Abstract

Recently, technology improvement and various auxiliary equipments for reliability of collection of information and rapid provision of information are in a trend of being developed and are installed in enlargement continuously. However, it is in a status that problems of c...Lead moreRecently, technology improvement and various auxiliary equipments for reliability of collection of information and rapid provision of information are in a trend of being developed and are installed in enlargement continuously. However, it is in a status that problems of compatibilty and stability per equipment and reliability of collected information are not solved according to combination or composition per products instead of funadamental solution by system integration. The purpose and meaning of this thesis are to prepare the foundation of ITS system with reliability through video image control equipments which are possible of integration control and monitoring possible to apply to CCTV system with application of ITS among these problems.This thesis has reviewed video image control equipments, which have stable and efficient functions required for ITS system, through flow map per functions and modules and it was confirmed that they are the most effective video image control equipments which can reveal and express control and operation status through video image screen or monitor system by user requirements while real-time video image control, status control and remote control of various information are possible. It is judged that video image control equipments having these functions will prepare foundation which can compose ITS system as efficient as well as reliable.

Abstract

Individual’s representative activity-travel pattern is the foundation of analyzing travel time, space and mode. Based on the actual data of 2004’s resident trip survey in one metropolis of north China, by using the systematic cluster analysis, thousands of citizens are di...Lead moreIndividual’s representative activity-travel pattern is the foundation of analyzing travel time, space and mode. Based on the actual data of 2004’s resident trip survey in one metropolis of north China, by using the systematic cluster analysis, thousands of citizens are divided into groups with representative activity-travel patterns according to representative social-economic attributes and activity-travel characteristics. By using the Monte Carlo method, every individual is endowed with a representative activity-travel pattern and the simulation of the activity-travel patterns of the whole urban residents is performed. The result shows that the maximum deviation of simulation ratio of full-time worker’s activity chain and actual ratio is 3.88%. It is the demonstration that simulation of individual representative activity-travel pattern based on systematic cluster analysis and Monte Carlo method is an effective way to gain the classified groups’ activity-travel characteristics.

Abstract

As ITS Business is growing up throughout the country, the demand of specialist rapidly is increasing in Korea. Therefore we started this study because the national management of education system was necessary. The Ministry of Land, Transport and Maritime Affairs (MLTM) pl...Lead moreAs ITS Business is growing up throughout the country, the demand of specialist rapidly is increasing in Korea. Therefore we started this study because the national management of education system was necessary. The Ministry of Land, Transport and Maritime Affairs (MLTM) plan to develop and operate ITS curriculum by stages. In this study, we organize and build how to operate the curriculum of ITS as a first step. ITS educational curriculum is consisted of course to need to all targets classified following in business field. ITS educational curriculum will offer the local student opportunity to participate in providing on-line service. ITS education will operate class lesson, On-line lesson, discussion lesson, practice lesson and a course can apply more than one way by considering character of each a subject. The ITS educational program developing in this study will provide ITS curriculum for ITS workers and people preparing the ITS job. Also this study will indicate the guideline operating the ITS educational program for the Ministry of Land, Transport and Maritime Affairs (MLTM) or the charged authority intentionally and continuously.

Abstract

The bi-modal tram can travel in not only dedicated track (lane) but also public roadway, whose passengers’ capacities are 2,500 to 7,000 persons/direction/hour. The bi-modal tram would be driven by CNG hybrid (series type) propulsion. All driving wheels were driven by ele...Lead moreThe bi-modal tram can travel in not only dedicated track (lane) but also public roadway, whose passengers’ capacities are 2,500 to 7,000 persons/direction/hour. The bi-modal tram would be driven by CNG hybrid (series type) propulsion. All driving wheels were driven by electrical traction motor-gearbox sets independently, which can eliminate differential gears to reduce turning radius and make low floor to provide the old and the handicapped with easy access. For automatic guidance, and precision docking in stations, the bi-modal tram uses the FROG navigation system which can recognize and calculate tram position, wheel steering angles, vehicle speed and orientation to measure magnets coordinates and polarity installed on the track every 4-5m. The bi-modal tram can also change operation mode (automatic/manual) by tram driver. Since the bi-modal tram is expected to be operated in the downtown area, strong cross wind occurred between high-rise buildings could produce sudden lateral movement (displacement) to influence its automatic operation. For the 3-car articulated bi-modal tram in the automatic operation mode, lateral movements occurred by strong cross wind were analyzed as change of vehicle speed and wind speed in the dynamic model developed by using the ADAMS. And then, safety supervision of cross wind was proposed and discussed for the bi-modal tram in this paper.

Abstract

Highways are stormwater-intensive land uses, since they are impervious and have high pollutant mass emissions from vehicular activity. Vehicle emissions include pollutants such as heavy metals, oil and grease, particulates from sources such as fuels, brake pad wear, tire ...Lead moreHighways are stormwater-intensive land uses, since they are impervious and have high pollutant mass emissions from vehicular activity. Vehicle emissions include pollutants such as heavy metals, oil and grease, particulates from sources such as fuels, brake pad wear, tire wear, and litter. The presence of heavy metals in highway stormwater runoff is of concern, as they are very toxic due to enhanced bioavailability, and have the potential not to degrade in the environment. Therefore, this research was carried out to understand the characteristics of metal pollutants in stormwater runoff from highways in Korea and to treat that runoff using zeolite filtration. The filtration facility was constructed on Korea Highway number 251 (Gaeryong I/C). The facility was operated during storms with durations of 0.3-4.8 hrs, and the influent treatment rate was varied from 3.60~17.34 m3/day. The first flush phenomenon for metal pollutants was observed in all of the storm events. The average removal efficiency was determined to be 62.5 % for TSS, 73.7 % for Cu, 61.8 % for Pb, and 67.3 % for Zn.

Abstract

The purpose of this study is to determine the economical standard for road signs by verifying the difference in driver's legibility time with respect to the spacing of letters on the road signs. Laboratory simulations were conducted to confirm the difference in legibility...Lead moreThe purpose of this study is to determine the economical standard for road signs by verifying the difference in driver's legibility time with respect to the spacing of letters on the road signs. Laboratory simulations were conducted to confirm the difference in legibility time for six target signs of different spacing. Also, a binary logit model was used to find the main factors, which could lower the rate of misreading. This model involves not only a simple enlargement of signs but also a suitable match of letters and signs along with the optimal spacing of the text letters on the road signs to increase the legibility of the sign. The result of this study verified the importance of spacing in road signs and proved itself to be an effective method to determine the future standard for the road signs.

Abstract

Correlation between visual condition of coating surface evaluated by image processing and electrochemical impedance spectroscopy (EIS) results for epoxy primer coating was investigated. In comparison of deteriorated area ratio and EIS results, impedance of coating greatly...Lead moreCorrelation between visual condition of coating surface evaluated by image processing and electrochemical impedance spectroscopy (EIS) results for epoxy primer coating was investigated. In comparison of deteriorated area ratio and EIS results, impedance of coating greatly decreased to 104Ω?? or less when rust and blistering area ratios were more than 0.1% and 3%, respectively. In regression analysis for correlation between deteriorated area ratios and EIS results, impedance and charge transfer resistance decreased as deteriorated area ratios increased with correlation of exponential decay. If EIS data measured for coating applied in fields are accumulated in the future, it is expected that correlation analysis like the method used in this study will make it possible to estimate electrochemical parameters from visual condition of coating surface without measurements.

Abstract

This paper focuses on the development of a dynamic multi-class assignment for evaluation and application of the dynamic route guidance strategy. Travelers are classified into three groups according to information contents which they received before departing or on trip. T...Lead moreThis paper focuses on the development of a dynamic multi-class assignment for evaluation and application of the dynamic route guidance strategy. Travelers are classified into three groups according to information contents which they received before departing or on trip. The first group have no traffic information, so they travel along with fixed route. The second group has real-time shortest path information from travel agency and takes the route. The last group has car navigation system or individual methods such as cell phone, PDA-two way communication for traffic information on trip. So they follow the control of DFS (decentralized feedback strategy) where the control system is operated locally. In order to consider these three groups in a model we propose a multi-class dynamic assignment model. With the proposed model some traffic information strategies are tested and interpreted in terms of ITS (Intelligent transport systems).

Abstract

This system is provides information to maintenance person recognize in realtime obstacle by automates a watch in facility of highway and toll road of toll collection system. Remote monitoring system collect obstacle occurrence information of toll collection system, evasio...Lead moreThis system is provides information to maintenance person recognize in realtime obstacle by automates a watch in facility of highway and toll road of toll collection system. Remote monitoring system collect obstacle occurrence information of toll collection system, evasion prevention system, overloaded vehicle detection system and hi-pass system in open and closed toll collection. It provides realtime obstacle perception function. It will be able to provide fee levy service perceives an obstacle occurrence quickly using various obstacle message function which is voice, SMS and E-mail.

Abstract

This study can be used as basic strategy information. In this report, current status of domestic Vehicle IT industry and diagnosis the obstacles and inhibitors of market in order to create and expand market. Addition to this, analyzing demand and request of market to priv...Lead moreThis study can be used as basic strategy information. In this report, current status of domestic Vehicle IT industry and diagnosis the obstacles and inhibitors of market in order to create and expand market. Addition to this, analyzing demand and request of market to private and public sectors to expand and create demanding market is necessary that we have proposed role play of each organization and role model of each industry.

Abstract

With the advances of wireless network and location sensing technology, Location-based services is widely spreading and at the same time, the expected risk coming from the misuse or overuse of personal location information is increasing. Therefore, to develop the location ...Lead moreWith the advances of wireless network and location sensing technology, Location-based services is widely spreading and at the same time, the expected risk coming from the misuse or overuse of personal location information is increasing. Therefore, to develop the location privacy self control framework and software is a very urgent and important issue. The Objective of this research is to propose the technological methods and standard specifications of location privacy protection for various location-based services based on the analytic results of OMA PCP and IETF GeoPriv standard protocols.

Abstract

The full opening of freeway has not only facilitated the transportation but also promoted the economic development in Taiwan. However, the sequential huge vehicular traffic has brought people the nightmare of traffic. Intelligent Transportation System (ITS) utilizes the a...Lead moreThe full opening of freeway has not only facilitated the transportation but also promoted the economic development in Taiwan. However, the sequential huge vehicular traffic has brought people the nightmare of traffic. Intelligent Transportation System (ITS) utilizes the advanced communication equipment and information technology to transmit immediate information of the traffic conditions around the road and start the whole statistics at the same time to get the assessment results of the traffic flow and speed of a motor vehicle. Meanwhile, the management units use such information to set up suitable traffic control strategy and measures to enable drivers to avoid the freeway sections of huge traffic flow. To raise the accuracy of the ITS results, we got the driving locus of individual vehicles from the transaction data of Electronic Toll Collection (ETC) system and fed it into the whole statistics along with the previous assessment results. In this way, we found that the assessment results were even closer to the fact.

Abstract

Construction purpose of Getaway Vehicle Capturing System by Automatic Number Plate Recognition(ANPR) is procurement of objective evidence by photographing number plate of getaway vehicle without paying toll fee in order to prevent dishonest vehicle.Construction purpose of Getaway Vehicle Capturing System by Automatic Number Plate Recognition(ANPR) is procurement of objective evidence by photographing number plate of getaway vehicle without paying toll fee in order to prevent dishonest vehicle.

Abstract

In this paper, a general algorithm for pedestrian detection by on-board monocular camera which can be applied to cameras of various view ranges in unified manner. The Spatio-Temporal MRF model extracts and tracks foreground objects distinguishing from background scenes by...Lead moreIn this paper, a general algorithm for pedestrian detection by on-board monocular camera which can be applied to cameras of various view ranges in unified manner. The Spatio-Temporal MRF model extracts and tracks foreground objects distinguishing from background scenes by referring to motion difference. During the tracking sequences, cascaded HOG classifiers classify the foreground objects into the two classes of pedestrians and non-pedestrians. Before the classification, geometrical constraints on the relationship between heights and positions of the objects are examined to exclude the non-pedestrian objects. This algorithm can operates quite robustly against noises and classification errors at each image frame.

Abstract

In ad-hoc network such as vehicle-to-vehicle communication (V2V) system, safety applications where vehicles broadcast the information such as car velocity, position, and so on periodically are considered. In these applications, if there are many vehicles broadcast data in...Lead moreIn ad-hoc network such as vehicle-to-vehicle communication (V2V) system, safety applications where vehicles broadcast the information such as car velocity, position, and so on periodically are considered. In these applications, if there are many vehicles broadcast data in a communication area, congestion incurs a problem decreasing communication reliability. We propose autonomous distributed transmit power control method to keep high communication reliability. In this method, each vehicle controls its transmit power using feed back control. And, we evaluate the effectiveness of proposed method using computer simulation.

Abstract

This study demonstrates a result of field tests of context awareness based multimodal connectivity passenger information, which is called "Intelligent Green Travel Service (I-GTS)” for public transit intermodal connectivity in Korea. A business model of I-GTS is developed...Lead moreThis study demonstrates a result of field tests of context awareness based multimodal connectivity passenger information, which is called "Intelligent Green Travel Service (I-GTS)” for public transit intermodal connectivity in Korea. A business model of I-GTS is developed in terms of system architecture based on systematic approach not only of characterizing the types and activities for transferring public transport but also of formulating the facilities of transferring infrastructure such as a large scale of public transit center. The field test has been conducted under a national ITS project which develops test and evaluation methodologies for facility and information design in the test-bed center, a large scale of intermodal center in Korea, Gimpo International Airport. The results from the field test show that the proposed I-GTS system could be applicable to the personalized service on demand for public transport users with respect to the location based services along the technologies and infrastructure in ubiquitous society.

Abstract

In order to enlarge the tracking range for better accuracy of speed measurements and better possibility of monitoring the vehicle behaviors, a seamless tracking with multiple video sequences is necessary. This paper proposes a tracking scheme with well-synchronized multip...Lead moreIn order to enlarge the tracking range for better accuracy of speed measurements and better possibility of monitoring the vehicle behaviors, a seamless tracking with multiple video sequences is necessary. This paper proposes a tracking scheme with well-synchronized multiple video sequences, in which the same rule-based tracking for each video sequence is cascaded. Also, the rule based tracking is augmented with Kalman filter. The result of tracking is successful to collect data such as temporal variations of vehicle speed and behaviors of individual vehicles in the enlarged tracking region.

Abstract

Advanced cruise-assist highway systems (AHS) has been developed based on road-vehicle cooperation for safety in Japan. The providing information on obstacles ahead service, which is one of AHS service, has been implemented as the providing information on obstacles ahead s...Lead moreAdvanced cruise-assist highway systems (AHS) has been developed based on road-vehicle cooperation for safety in Japan. The providing information on obstacles ahead service, which is one of AHS service, has been implemented as the providing information on obstacles ahead service and as the new preventing danger entering curves service by organizing systems adapted to characteristics of various regions, based on the achievements of past proving test on the Metropolitan Expressway. The effectiveness of the merging assistance service was also verified based on the results of the proving tests on the Metropolitan Expressway. In 2009, combined proving tests of the providing information on obstacles ahead service and the merging assistance service were conducted in the Keihanshin Region, while combined proving tests of the providing information on obstacles ahead service and the prevention of overshooting on sharp curves service were conducted in the Aichi Region. This paper presents outlines and reports on the results of the proving tests in the two regions.

Abstract

Automatic Gain Control (AGC) is critical in wireless communications to establish reliable communication links. In this paper, we introduce a simple and novel AGC scheme which uses both Received Signal Strength Indicator (RSSI) and analog-to digital converter (ADC) signals...Lead moreAutomatic Gain Control (AGC) is critical in wireless communications to establish reliable communication links. In this paper, we introduce a simple and novel AGC scheme which uses both Received Signal Strength Indicator (RSSI) and analog-to digital converter (ADC) signals. Performance enhancement of the proposed AGC scheme is verified with practical measurements including simulations.

Abstract

This paper describes development and application of automatic accident recording system (AARS, in-car accident recorder) in Korea. First of all, the needs of automatic accident recording system are presented. There are many limitations in constructing traffic accidents. T...Lead moreThis paper describes development and application of automatic accident recording system (AARS, in-car accident recorder) in Korea. First of all, the needs of automatic accident recording system are presented. There are many limitations in constructing traffic accidents. Therefore recording of driving information are necessary for finding accurate causes of accidents and follow-up measures. World trend in legislation of automatic accident recording system are summarized. Second, benefit of installing an in-car accident recorder is discussed. Both qualitative and quantitative effects are included. Benefit and cost regarding installing an in-car accident recorder are analyzed. Last, present supply condition for AARS in Korea is illustrated. This paper provides the way to supply AARS widely in Korea.

Abstract

Although many studies have been carried out on the pattern of behavior of drivers which result from the provision of traffic information, there have been few detailed studies on the composition of message, method for message expression, time of provision, point of provisi...Lead moreAlthough many studies have been carried out on the pattern of behavior of drivers which result from the provision of traffic information, there have been few detailed studies on the composition of message, method for message expression, time of provision, point of provision, media for provision, changes by traffic condition, etc. Increasing interests in dispersion of traffic flows through providing traffic information, there have been many researches of drivers' behavior and effectiveness of diversion, as the basic research. In this paper, we intend to analyze how a diversion was determined and its effect through correlation analysis between diversion rate estimated by actual survey and the traffic condition. As the result of speed?flow analysis, diversion mechanism was founded. That is, when travel speed was decreased, the detour volume was increased. And then the traffic volume was decreased by increase of diversion and traffic condition got better, the detour volume was decreased again. This study was intended to provide an insight into the changes in the characteristics related to the provision of information by analyzing how the patterns of information utilization change depending on the traffic condition and reclassifying such patterns according to the characteristics of media. Unlike the existing studies, this study adopted the traffic condition, using rate of information media, and the correlation coefficient label as the basis for information media classification, and categorized them into passive utilization media, active utilization media, and past experience in order to ensure the statistical reasonability. The categorized using rate of information media and traffic condition was found to have a positive(+) correlation with the travel speed in the case of passive utilization media during both consecutive holidays(Korea’s traditional Thanksgiving day) and weekends, but had a negative(-) correlation with the positive utilization media and past experience.

Abstract

Effective and efficient management of expressway traffic noise requires methodical and systematic approaching for road-side noise monitoring of expressways. Efforts of expressway noise control, such as noise barrier constructions and low noise pavements, should be planned...Lead moreEffective and efficient management of expressway traffic noise requires methodical and systematic approaching for road-side noise monitoring of expressways. Efforts of expressway noise control, such as noise barrier constructions and low noise pavements, should be planned based on the results of methodical and systematic noise monitoring. Long term noise monitoring data determine the method and amount of the noise reduction effort. In this study, we have suggested an Expressway Noise Monitoring System for effective and efficient use of the data on expressway noise management. The monitoring system has consisted of 2 sets of noise measuring system, 1 set of traffic volume measuring system, 1set of weather measuring system and 1 set of site observation system by a digital camera. Data from the system can be saved to the hard disc of the field computer and also be transferred by the wireless LAN to the server system of the office by a wireless LAN. The system measures noise levels, traffic volume and vehicle speed by lane from the expressway and also measures wind speed, atmospheric temperature, humidity, takes pictures of the measuring site simultaneously at real-time. For measuring noise from the expressway, 8 outdoor microphones are set on both side of the road and 4 microphone array is used for one side of the road because of checking the directivity of noise from the expressway. Two monitoring system are set on the different type of pavement road, one is concrete pavement and the other is asphalt concrete pavement for the study.

Abstract

Ubiquitous used to express the natural resources around us such as air or water means ‘whenever and wherever’ or ‘existing simultaneously’ and nowadays it indicates the future digital era. Realizing a ubiquitous era, that is, the users have access to the information whene...Lead moreUbiquitous used to express the natural resources around us such as air or water means ‘whenever and wherever’ or ‘existing simultaneously’ and nowadays it indicates the future digital era. Realizing a ubiquitous era, that is, the users have access to the information whenever and wherever they desire, requires implementing reformation to lead digital era in collecting information. In other word, it’s necessary for the users to play the supplier’s role for other users, which means the supplier may be switched to the user, besides the division of role as supplier or user. UCC is the good example. YouTube (www.youtube.com), an UCC website in 2005 processed more than 100 million video data and daily users totaled 6 million, which was valued at U$1.6 billion at least. According to Korea Internet & Security Agency, those who used UCC in 2007 reached 83.5%. Many people share the thought that the environment in which the user may collect the traffic information that has been unilaterally centralized to the supplier shall be provided in line with the era when individual's role in creating information is increasingly important. This research thus was intended to propose the technical approach to create the traffic information by individual using WiBro network, a bidirectional wireless Internet and traffic information algorithm to make it public information.

Abstract

Emerging paradigm dubbed Ubiquitous worldwide has brought about a large reform in ITS Service. Such reform, of course, was possible thanks to significant development of electronic /system/communication technologies that serve the basis of integrated system such as ITS, an...Lead moreEmerging paradigm dubbed Ubiquitous worldwide has brought about a large reform in ITS Service. Such reform, of course, was possible thanks to significant development of electronic /system/communication technologies that serve the basis of integrated system such as ITS, and compacted portable terminal and similar media and changed consumers’ demand. Such change of awareness, from service provider or supplier’s standpoint, means the understanding of information has been shifted from the existing frame of ‘traffic information = text’ to the concept of 'traffic information = multimedia contents’ (i.e. visual, audio). Thus the study was intended to propose the urban traffic information collection system using airship from new contents viewpoint. And as part of preliminary study, the limitation of ITS information collection system focusing on rather supplier or operator’s standpoint than user or consumer’s standpoint was proposed, along with the evaluation of the use of aerophoto. The need of aerophoto may be approached from the two standpoints. First, the trend of the customers who retrieve the traffic information. As aforementioned, the current advanced technology led the customers to prefer the picture over the text and prefer the video over the picture. Accommodating the trend is the way for ITS to survive in the new era. Second, the limits of existing detection system which restrains the development of new contents. Generally, the fundamental data of the traffic comprises spot (i.e. volume), link (i.e. density, space and speed) and polygon (i.e. network, demand).

Abstract

This paper describes a novel ORTI aware debugging system for development of automotive applications based on OSEK/VDX operating system (OSEK OS). This system uses an ORTI file as universal interface to the objects of the OSEK OS. The ORTI file is generated based on the pa...Lead moreThis paper describes a novel ORTI aware debugging system for development of automotive applications based on OSEK/VDX operating system (OSEK OS). This system uses an ORTI file as universal interface to the objects of the OSEK OS. The ORTI file is generated based on the parsed OIL file by the system generator of the OSEK OS vendor. The ORTI aware debugging system provides special display functions for internal operating system data and properties of the OSEK objects using the ORTI file. In this paper, we show the design and the implementation of the ORTI aware debugging system.

Abstract

A lot of new technologies and new lighting systems of vehicle have been applied in headlamp to improve forward visibility and decrease glare. One of technologies is adaptive forward lighting systems with various beam patterns such as bend lighting mode, city mode, express...Lead moreA lot of new technologies and new lighting systems of vehicle have been applied in headlamp to improve forward visibility and decrease glare. One of technologies is adaptive forward lighting systems with various beam patterns such as bend lighting mode, city mode, expressway mode and adverse weather beam. In this investigation, operation algorithm and prototype adaptive headlamp under rainy weather were developed for old drivers with poor visual acuity. From the experimental results, value of mean luminance of adaptive headlamp was much lower than those of other headlamps in the near field. Glare of adaptive headlamp for rainy weather condition was less than those of HID headlamp.

Abstract

Handover scheme is important technique to provide seamless communication in vehicular environments. In this paper, we introduce a novel L2 handover scheme which uses common time base and transmits beacon frame based on that time base. The proposed L2 handover algorithm wa...Lead moreHandover scheme is important technique to provide seamless communication in vehicular environments. In this paper, we introduce a novel L2 handover scheme which uses common time base and transmits beacon frame based on that time base. The proposed L2 handover algorithm was implemented and tested on the test road.

Abstract

In the future urban transport system development strategy, it must be the emphasis to construct a multi-system interactive urban comprehensive public transport system with a certain service level. As an important part of this system, Para-transit has important theoretical...Lead moreIn the future urban transport system development strategy, it must be the emphasis to construct a multi-system interactive urban comprehensive public transport system with a certain service level. As an important part of this system, Para-transit has important theoretical significance and application significance. Mobility Allowance Shuttle Transit, which is an innovative concept of Para-transit, merges the flexibility of Demand Responsive Transit systems with the low cost operability of fixed-route bus systems. In this paper, we study the multi-vehicle system design problem for MAST, and develop a non-backtracking nearest-insertion algorithm, which is based on the research and analysis on the single-vehicle system. We also compare the performance of the multi-vehicle system with a single-vehicle system by a simulation analysis.

Abstract

The feedforward control is a very important factor for the autonomous vehicle driving system. It’s also important for this system to set the driving trajectory in the feedforward control system, which enables vehicles(e.g., truck and bus) to follow the designated course a...Lead moreThe feedforward control is a very important factor for the autonomous vehicle driving system. It’s also important for this system to set the driving trajectory in the feedforward control system, which enables vehicles(e.g., truck and bus) to follow the designated course automatically from the departure point to the destination point. This driving trajectory is the 3D geometric curve, which is generated by calculating the 3D road map data(e.g., white line marking, stop line), and includes various attributes like 3D positioning data(e.g., latitude, longitude and altitude), direction, curvature, vertical slope, cumulative distance and the position of informatory sign(e.g., stop line, cross walk). The 3D geometric curve with these attributes is useful for automatic steering control system, which the vehicle can move with safety travel speed, adequate steering angle and so on. In this paper, we propose the geometric curve generation approach, and we demonstrate the effectiveness of the proposed approach by applying it to the system and generating the driving trajectory.

Abstract

Japanese society is rapidly aging and the birth rate falling faster than any other countries in the world. Therefore, it is important to create a universal society in Japan. The ministry of Land, Infrastructure, Transport and Tourism (MLIT) is trying to develop the free m...Lead moreJapanese society is rapidly aging and the birth rate falling faster than any other countries in the world. Therefore, it is important to create a universal society in Japan. The ministry of Land, Infrastructure, Transport and Tourism (MLIT) is trying to develop the free mobility system that is intended to remove any restrictions on the mobility of all people by applying advanced information or communication technologies. In order to provide barrier-free guide maps or navigation services for vulnerable road users, it is necessary to collect barrier-free network or facility data. MLIT has carried out experimental studies on pedestrian network data collection in various environments throughout Japan. In this paper, outline of pedestrian network data and draft of data specifications based on the result of surveys are described.

Abstract

In Korea, other highway corporations including KEC is using TCS and ETCS to collect Tolls. But, There is potential problems of TCS not separating vehicle classification from the same specifications of vehicles by recognizing the plate number of vehicles because there are ...Lead moreIn Korea, other highway corporations including KEC is using TCS and ETCS to collect Tolls. But, There is potential problems of TCS not separating vehicle classification from the same specifications of vehicles by recognizing the plate number of vehicles because there are various kind of vehicle, rapid government policy etc. So, This paper tries to show solution separating vehicle classification from the same specifications of vehicles by recognizing the plate number of vehicles