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Abstract

Recent year, the new trend of car industry is intelligent vehicle which take notice of its location and recognize environment. We developed the VDC (Vehicle Data Convergence) Framework to serve as a standard vehicle infotainment and/or a standard power-train in the future...Lead moreRecent year, the new trend of car industry is intelligent vehicle which take notice of its location and recognize environment. We developed the VDC (Vehicle Data Convergence) Framework to serve as a standard vehicle infotainment and/or a standard power-train in the future. With regard to information processing in the car, we turned the hardware required for train control into software, and thus developed the Vehicle Data Convergence (VDC) Framework that allows for centralized management of all information processing.

Abstract

The traffic service that sends and receives vehicle safety related information by using wireless communication among moving vehicles is called traffic safety communication service. This study proposed an algorithm that delivers accident information swiftly to driver behin...Lead moreThe traffic service that sends and receives vehicle safety related information by using wireless communication among moving vehicles is called traffic safety communication service. This study proposed an algorithm that delivers accident information swiftly to driver behind in case traffic accident occurs, and calculates the risk degree of serial collision in current driving condition under the assumption that wireless communication service using wireless broadband communication is established on the highway. Furthermore, through the comparison of the result values with the use of the proposed algorithm, maximum tolerance value of delay time by system and driver reaction was estimated. This study used vehicle speed, acceleration and location as input information, and utilized separation distance by the final stopped location of the vehicle as risk degree determinant information. In the simulated experiment, total delay time was divided into the system delay time by accident detection and delay time by communication speed and driver recognition reaction, and by varying delay time values, results values were compared. As a results, it was estimated that in case total delay time exceeds 2 seconds, driver in the rear cannot prevent accident even after receiving the information.

Abstract

At present, VDS (vehicle detection system) is installed at each 1Km on every highway section and traffic quantity of vehicles, section average speed, section occupation rate and etc are transmitted to traffic collection server of Korea Expressway Corporation. However, dat...Lead moreAt present, VDS (vehicle detection system) is installed at each 1Km on every highway section and traffic quantity of vehicles, section average speed, section occupation rate and etc are transmitted to traffic collection server of Korea Expressway Corporation. However, data accuracy of data of entry vehicles and entry vehicles from opposite lanes of VDS (vehicle detection system) controller is difficult to trust because it is blocked by shoulder noise protection walls. In this thesis, improvement method of VDS (vehicle detection system) traffic collection and improvement method of collection information accuracy using wireless Bluetooth will be suggested.

Abstract

Recently, it is focused on improving vehicle safety and convenience using wireless communication, because large-scale consecutive vehicle crashes occurred in heavy fog or rain frequently. Consecutive vehicle crash prevention using wireless communication consists of crash ...Lead moreRecently, it is focused on improving vehicle safety and convenience using wireless communication, because large-scale consecutive vehicle crashes occurred in heavy fog or rain frequently. Consecutive vehicle crash prevention using wireless communication consists of crash detection and accident information delivery to drivers. The latter can be achieved through vehicle to infra-structure (V2I) or vehicle to vehicle (V2V) communications. In V2I communications, center-based or local-based accident handling can be considered. This paper proposes new approach to prevent vehicle crash using V2I communications, local-based accident handling, and anycast/multicast communication. This reduces traffic between on-board units(OBU) and accident handling servers and delivers emergency information to cars behind, that accident can be happen, stably and simultaneously. We verify the network architecture, requirements and technical feasibility based on testbed.

Abstract

A lot of projects to study future traffic environments aim to enhance traffic safety, to provide convenience and to improve traffic flow are undergoing in many countries. And social demand of traffic information is increasing in the world as well as Korea. In spite of inc...Lead moreA lot of projects to study future traffic environments aim to enhance traffic safety, to provide convenience and to improve traffic flow are undergoing in many countries. And social demand of traffic information is increasing in the world as well as Korea. In spite of increasing demand, to implement Intelligent Transportation Systems(ITS) need a lot of budget and requires long time to design and implement the system. This paper shows new strategies of configuration and design of Information Technology(IT) resources such as hardware and software for future traffic environments through prospecting Cloud computing is regard as innovative trend in field of IT.

Abstract

There are two kinds of traffic information gathering and providing services at this moment. Those are TPEG, UTIS. It is not easy to provide a service in terms of every road in the whole country based on the records in every minute or second as they gather the record only ...Lead moreThere are two kinds of traffic information gathering and providing services at this moment. Those are TPEG, UTIS. It is not easy to provide a service in terms of every road in the whole country based on the records in every minute or second as they gather the record only in the capital or metropolitan area. To solve this critical problem, a smart phone with WCDMA can collect the traffic records and process it. The traditional TPEG and UTIS systems, however, have difficulty managing it because this plan needs to process massive traffic data at national level. In this paper, a system architecture that gathers, saves and processes traffic data on the basis of WCDMA is suggested.

Abstract

Vehicular ad-hoc networks are considered as a modern technique for increasing the safety of drivers. In this research, effect of using vehicular ad-hoc networks for increasing average speed of drivers’ is studied. A microscopic model has been proposed based on the optimiz...Lead moreVehicular ad-hoc networks are considered as a modern technique for increasing the safety of drivers. In this research, effect of using vehicular ad-hoc networks for increasing average speed of drivers’ is studied. A microscopic model has been proposed based on the optimization process of drivers' for increasing speed. This model has been simulated by a cellular automata simulator and compared with the real data. It has been shown that there is no reason to consider the model invalid for drivers' behavior in Iran. The proposed model is used for studying the effect of using vehicular ad-hoc networks on traffic parameters. It has been shown that, using vehicular ad-hoc networks the average speed in the freeways can be increased during non-congested traffic conditions.

Abstract

Korea Highway Corporation has played a role of the construction and operation of the highway for the past for 40 years. The private sector since the 90s has made highway construction and operation. Central government and local governments were paid at subsidy in least ope...Lead moreKorea Highway Corporation has played a role of the construction and operation of the highway for the past for 40 years. The private sector since the 90s has made highway construction and operation. Central government and local governments were paid at subsidy in least operating income to 1.5896 trillion won for private operators from 2001 to 2008. Thus, Korea Highway Corporation will have important implications for understanding the cost structure. Korea Highway Corporation, a general analysis of the input element is used efficiently. And the operation of labor and capital estimated highly of the substitution elasticities. Korea Highway Corporation are judged to need financial separation of a strategic outsourcing enabled and the construction and operation institutions. In addition, currently running at highway the operation of private institutions combined to configure a new institution, if that institution invigorate the hi-pass, more of the country's highway believe to be increase operational efficiency.

Abstract

Recent developments in Ultra Wideband (UWB) technology have opened a way to create wireless networks for intra-vehicle environment. In the UWB literature, extensive analyzing work has been done for indoor and outdoor propagation, but very few analyses were investigated fo...Lead moreRecent developments in Ultra Wideband (UWB) technology have opened a way to create wireless networks for intra-vehicle environment. In the UWB literature, extensive analyzing work has been done for indoor and outdoor propagation, but very few analyses were investigated for intra-vehicle environments. This paper aims to analyze the performance of UWB propagation for intra-vehicle Networked Control System (NCS). A typical NCS includes two scenarios, one for communication that is undertaken beneath the chassis and another for transmitting and receiving terminals that are positioned within the engine compartment. To evaluate the performance of UWB propagation, we use the recently proposed channel models for intra-vehicle environment, those that are based on the IEEE 802.15.3a standard. Through simulations the bit error rate (BER) performance against the signal to noise ratio (SNR) under different intra-vehicle environments are shown. We also compare the UWB propagation performance of intra-vehicle communications and that of indoor/outdoor environments.

Abstract

Since the FTMS (Freeway Traffic Management System) in 1993, the ITS of Korea didn't have a standardized method and criteria for evaluating accuracy and operability of spot information for approximately 15 years. Accordingly, each body verified accuracy on the basis of its...Lead moreSince the FTMS (Freeway Traffic Management System) in 1993, the ITS of Korea didn't have a standardized method and criteria for evaluating accuracy and operability of spot information for approximately 15 years. Accordingly, each body verified accuracy on the basis of its own criteria. However, the Ministry of Land, Transportation and Maritime Affairs (MLTMA) developed a system of evaluation criteria in 2006 and established the "ITS Evaluation & Certification Outline" and started evaluation and certification for field equipment, for example, vehicle detectors in 2008 after a pilot operation period. We cannot overemphasize the importance of accuracy evaluation in traffic information. Required is the great effort of the institutions of managing and operating the ITS facilities so that evaluation and certification which just started can contribute to improving data accuracy and scientific maintenance and perfectly operate. In this study, I present some problems in the field discovered in ITS evaluation and certification which has been carried out for 2 years. Checking difficulty in data collection on a spot depending on various road conditions, I will present needs for improving spot evaluation equipment for carrying out more efficient ITS evaluation and certification.

Abstract

The Automatic Vehicle Classification Equipment (AVCE) is used to collect traffic information, for example, the speed of a passing vehicle, the number of passing vehicles, the class of a vehicle (12 classes), etc. In ITS Evaluation & Certification currently carried out by ...Lead moreThe Automatic Vehicle Classification Equipment (AVCE) is used to collect traffic information, for example, the speed of a passing vehicle, the number of passing vehicles, the class of a vehicle (12 classes), etc. In ITS Evaluation & Certification currently carried out by KEC (Korea Expressway Corporation), used are PODEs POrtable roadway Detector Evaluation systems) and high resolution cameras for evaluation of AVCE. The analyzer visually checks the video recorded by a high-resolution camera to classify the class of a vehicle. However, it is not considered a good method because it takes a long time for classification in that all of the data for the class of individual vehicles must be manually entered after visually checking the class of vehicles. Also, there is a possibility of the longer the time for visual checking by an analyzer, the less accuracy in vehicle classification. Therefore, in this study, I propose an AVCES (Automatic Vehicle Classification Evaluation System) which can easily and accurately carry out vehicle classification evaluation. With this system, it is expected that ITS evaluation and certification will be carried out more efficiently and reliably.

Abstract

Generally, highway design guides provide standard rules to design highways, and the guidelines to design highways were generated by results from many empirical studies and experiences related to highway safety. However, there are lots of vehicle crashes and some of them a...Lead moreGenerally, highway design guides provide standard rules to design highways, and the guidelines to design highways were generated by results from many empirical studies and experiences related to highway safety. However, there are lots of vehicle crashes and some of them are happened by highway design problems even though the highways were built by general design guidelines. It has been known that crashes are mainly caused by human errors not by design problems. Therefore safety evaluation of designed highway layouts is a very important process using historical safety data. Through this study, a safety evaluation system based on historical accident data was developed. First of all, accident prediction models were developed for various types of highways, and then the safety evaluation system which enable to evaluate safety level for designed highways and provide the results using visualized methods. A core of the safety evaluation algorithm is AMFs, which means a relative effect of geometric conditions on frequency of vehicle crashes. Using this system, the highways that will be constructed can be checked the safety problems and improved before construction. In addition, preliminary safety check in the design step, the additional cost to improve highway conditions after vehicle crashes happened can be reduced.

Abstract

The traffic accident is caused by bad weather conditions like rain fall, snow or ice cover of road surface status. The microwave radiometer measures the natural thermal radiation from the terrestrial atmosphere and the road surface and it can detect the status of road by ...Lead moreThe traffic accident is caused by bad weather conditions like rain fall, snow or ice cover of road surface status. The microwave radiometer measures the natural thermal radiation from the terrestrial atmosphere and the road surface and it can detect the status of road by the measurement of emissivity. There are several reasons to use microwave for remote sensing of road surface compare with IR or visible camera. The most important reasons are their capability to penetrate clouds, fog, and rain with small attenuation. Additionally, microwave remote sensing is not dependent on the sun as source of illumination. The information observed by visible and infrared radiation mainly determines the molecular resonance in the surface layer of the soil, whereas the information observed by microwaves determines geometric and bulk-dielectric properties of the surface or volume studied. In this paper, the theoretical analysis of water emissivity and dielectric characteristics are investigated to monitor the water layer on the road surface. Theoretical calculation of water emissivity and derived and the result is validated by the experiment in indoor and outdoor.

Abstract

A key of S/W design for the establishment of USN-BASED Parking Information System lies in the realization of demand prediction algorithm. Demand prediction algorithm shall predict future parking demand by analyzing the current parking situation, entrance/exit data of the ...Lead moreA key of S/W design for the establishment of USN-BASED Parking Information System lies in the realization of demand prediction algorithm. Demand prediction algorithm shall predict future parking demand by analyzing the current parking situation, entrance/exit data of the past and etc of parking lots and shall provide prediction information according to prediction units established in each information guidance board, various provision media and etc on real-time. For developing an algorithm for this kind of parking demand prediction, accurate patterns and forms of parking lots shall be understood by analyzing general characteristics. In general, parking data have chronological characteristics and prediction techniques for reflecting these shall be reviewed in a variety. This study has established demand prediction algorithm, each variable and etc for the establishment of Parking Information System by reviewing various prediction techniques in integration. In addition, in the part of design of algorithm, existing prior researches, research trend and etc were reviewed and reflected and parking demand prediction algorithm, which is appropriate, by investigating situations, actual status of operation and etc of parking lot and surrounding regions was designed. The demand prediction algorithm developed in this way was applied to Test-Bed fields and based on this, actual operation status of Parking Information System was monitored. Data of actually operated Parking Information System were collected and arranged for a certain fixed period and comparison and analysis for data on the system, patterns for actual parking status and behaviors of usage of parking were carried out.

Abstract

The purpose the Green Signal Countdown Devices (GSCD) is to provide the advance information of the green light termination and to help drivers make their stop/go decision easier and predictive. In order to explore the driver’s interactions with GSCD information and the ef...Lead moreThe purpose the Green Signal Countdown Devices (GSCD) is to provide the advance information of the green light termination and to help drivers make their stop/go decision easier and predictive. In order to explore the driver’s interactions with GSCD information and the efficacy of the GSCD, intersection in Kaohsiung city, Taiwan was chosen as the experimental site to test and analyze several GSCD information scenarios. A high accuracy data logger system was developed and calibrated to fulfill the need of recording the passing vehicles characteristics and signal phase data simultaneously. The experimental results among scenarios were compared and a compromise strategy of GSCD between traffic safety and driver’s satisfaction was discussed.

Abstract

According to the railroad facility safety standard (Korean MLTM Announcement No. 2006-395), risk Assessment for railroad-tunnel fire should be performed when design stage. Therefore, technical methods and scenario of risk assessment for tunnel fire have been studying in K...Lead moreAccording to the railroad facility safety standard (Korean MLTM Announcement No. 2006-395), risk Assessment for railroad-tunnel fire should be performed when design stage. Therefore, technical methods and scenario of risk assessment for tunnel fire have been studying in Korea. A guide manual for risk assessment of tunnel fire would be announced by Korean MLTM before long. In the paper, QRA(Quantitative Risk Analysis) technique for fire risk assessment is presented and applied to a tunnel for fire safety. Each fire scenarios are performed by using computational fire/egress simulation.

Abstract

In T-junction intersection with which main stream have large amount of traffic and sub-stream have small amount of traffic, semi-responded traffic control systems has been applied by using loop detector. In spite of high detection performance of loop the incorrect detecti...Lead moreIn T-junction intersection with which main stream have large amount of traffic and sub-stream have small amount of traffic, semi-responded traffic control systems has been applied by using loop detector. In spite of high detection performance of loop the incorrect detections, such as over-detection of the vehicles that pass through the entry position loop but left out of the turn-left lane, under-detection of vehicles that entering to turn-left lane without penetrate the entry position loop and under-detection of not passed vehicles during the turn-left signal, were recognized as beyond control. This work is for system development, utilized image processing technology, to minimize the mis-detection of vehicle of Vehicle Detection and Responded System and improves the efficiency of the traffic operation. Utilized the image processing technology to recognize the presence of vehicles in turn-left lane of main road and sub road, calculate the length of queue, also the information of traffic of intersection such as the volume of vehicle passages and the average speed of given time interval were collected. To evaluate the effectiveness of this work, a specific intersection selected for this work and the contents of this works were examined, compared the volume of vehicles and the waiting time to green signal with TOD(time of day) mode operation and verify the effectiveness of this work.

Abstract

U-bike aims at cycling users to be served cycling environment at any time, and anywhere. In order to do that, much diverse road and traffic information should be collected and provided than present road situation. Nowadays, the government presented low carbon green growth...Lead moreU-bike aims at cycling users to be served cycling environment at any time, and anywhere. In order to do that, much diverse road and traffic information should be collected and provided than present road situation. Nowadays, the government presented low carbon green growth as the key policy and the bicycle user want to be served more development bicycle information. Therefore it is time to construct Ubiquitous Bike environment. All of these backgrounds are the reason why this paper studies that collect and provide information method for U-Bike environment.

Abstract

To overcome the critical limitations of the current ITS technology in transmitting the rough traffic information via the center, the new technologies of the V2V wireless communication and the lane based precised vehicle location are recently developed. This study is prese...Lead moreTo overcome the critical limitations of the current ITS technology in transmitting the rough traffic information via the center, the new technologies of the V2V wireless communication and the lane based precised vehicle location are recently developed. This study is presented to introduce the V2V technology enabling to collect and provide the lane-based vehicle information in the real-time traffic flow, and to evaluate the effect on the driving behaviors under the unspecified incidents and then the lane closures for the highway traffic flow management

Abstract

Incheon Bridge, the longest bridge of Korea which crosses the Yellow Sea consists of several special featured bridges. A bridge health monitoring system of marine section of the Incheon Bridge was introduced. This monitoring system was planned focusing the maintenance of ...Lead moreIncheon Bridge, the longest bridge of Korea which crosses the Yellow Sea consists of several special featured bridges. A bridge health monitoring system of marine section of the Incheon Bridge was introduced. This monitoring system was planned focusing the maintenance of cable stayed bridge, the main bridge span of the Incheon Bridge. All instruments were installed on the bridge and they have indicated their location thanks to the GPS. Tiltmeters, cable tension meters, laser displacement meters, strain gauges, thermometers, and bearing shoe displacement meters were attached at the bridge. Additional sensors for better maintenance of the bridge during the traffic operations were installed on connecting bridge and viaducts for continuous bridge health monitoring system of Incheon Bridge. Advanced monitoring systems, such as Shape Management System using GPS, Earthquake Measurement System, All-the-data Time Synchronization System, Sensor Surveillance & Management System, and, Intelligent Management System connecting External System were adopted for this bridge. In addition, Real-time Inquiry System and Event Management System were adopted for real-time bridge movement surveillance and event occurrence encounter.

Abstract

The current variable speed limit(VSL) control system is limited to control the traffic flows in terms of control target and scope under the existing ITS technologies. The objectives of this study are to develop the VSL control strategy under the advanced V2V communication...Lead moreThe current variable speed limit(VSL) control system is limited to control the traffic flows in terms of control target and scope under the existing ITS technologies. The objectives of this study are to develop the VSL control strategy under the advanced V2V communication and individual vehicle detection technologies and compare its performance with the current VSL control system.

Abstract

To secure convenient transportations along the Incheon Bridge expressway, information on traffic accident risk and weather change should be promptly delivered to users and the ultimate goal of FTMS is to accurately inform the users with situations on Incheon Bridge and to...Lead moreTo secure convenient transportations along the Incheon Bridge expressway, information on traffic accident risk and weather change should be promptly delivered to users and the ultimate goal of FTMS is to accurately inform the users with situations on Incheon Bridge and to prevent secondary accidents. Furthermore, it has a significant function of selecting the route to the Incheon International Airport by accurately delivering the situation of Incheon Bridge to drivers who are expected to use the Incheon Bridge from the Gyeongin 2nd Expressway and National Road. In addition, in terms of toll collection, it should be able to provide accuracy of 99.9% on vehicle classification for sales inspection. As a high-tech system that is operated for 24 hours, it should ensure reliability, prevent violation, provide easy operation of equipments and so on to maximize the efficiency of operation. For drivers especially using Incheon Bridge Toll Booths, various toll payment means should be provided to minimize delay at toll booths which results in the highest satisfaction of customers and this is the important matter.

Abstract

As the latest vehicles have more high-tech entertainment systems, the data volume, speed and quality over in-vehicle networks has rapidly grown. Thus it demands the development of low-cost, low-weight interconnection with ever-increasing transmission speed. Plastic optica...Lead moreAs the latest vehicles have more high-tech entertainment systems, the data volume, speed and quality over in-vehicle networks has rapidly grown. Thus it demands the development of low-cost, low-weight interconnection with ever-increasing transmission speed. Plastic optical fiber (POF) is the most likely candidate for in-vehicle networks, due to its high-speed, low-EMI, low-cost characteristics. Figure 1 shows the block diagram of a fiber optic transmission system. In fiber optic transmission system, the most important parameters are their cost and current consumption. Thus, fiber optic transceiver for POF should have simple structure, while being satisfied with system requirements such as digital I/O level, the large range of operating frequency, and the large input dynamic rage. In this paper, we describe the design and implementation of fiber optical transceiver for in-vehicle networks using low-cost standard CMOS technology. In-vehicle network systems require low cost, stable, and robust interconnection. Fiber optic transmitter has to provide stable and constant output optical power with respect to internal PVT (process, voltage, and temperature) variations and external environments, such as temperature and age. In the receiver side, the pulse-width distortion is the main performance factor to determine the quality of the transmission signal. Proposed fiber optic transmitter and receiver can operate up to 50-Mb/s of bit rates and consume only 20-mW and 12-mW for a 3.3-V single supply voltage, respectively.

Abstract

In this paper, we propose integration strategy of traffic information for provision and transportation planning. In particular, we are emphasizing about needs and function of integration centers, through case study on the leading integrated traffic information center, Seo...Lead moreIn this paper, we propose integration strategy of traffic information for provision and transportation planning. In particular, we are emphasizing about needs and function of integration centers, through case study on the leading integrated traffic information center, Seoul TOPIS. (Seoul Transport OPeration & Information Service). So we are suggesting integration of individual traffic information for effective use of information. And proposed strategies for effective integration of traffic information was two. The first is standardize for connection and integration of traffic information. The second is the development of a standard platform for use to transportation planning of integrated traffic information. In future, traffic information integration will be made based on these technical standards. In addition, traffic information service will be improved by using this Technical Standard

Abstract

The diffusion rate of Car Navigation System (CNS), one of accessible ITS devices, is already 45.7% (1) in Japan even though it still stays at 11.3% (2) in the world. The diffusion rate, however, is expected to increase up to 27.7% by 2012 (2) in the world with the expansi...Lead moreThe diffusion rate of Car Navigation System (CNS), one of accessible ITS devices, is already 45.7% (1) in Japan even though it still stays at 11.3% (2) in the world. The diffusion rate, however, is expected to increase up to 27.7% by 2012 (2) in the world with the expansion of technology and wide recognition. At the same time, there are few such previous studies or clear direction on which region or area the CNS would possibly widespread or become very convenient. In this study by socio-economic policy methodology, therefore, we would like to find out the condition for diffusion of CNS by comparing the diffusion rate of CNS, the total road length, the number of car registration, and the average income in each prefecture and etc in Japan. In addition, by looking at the region where they make an effective use of CNS, we would like to achieve result to improve efficiency on urban traffic all over the world with green ITS under inter-modal community.

Abstract

As the rapid development of logistics technology, the idea of logistics management was quickly adopted by most of vehicle manufacturing industries. It is very critical for the industry to organize the material at each workspace, monitor and control the situation of materi...Lead moreAs the rapid development of logistics technology, the idea of logistics management was quickly adopted by most of vehicle manufacturing industries. It is very critical for the industry to organize the material at each workspace, monitor and control the situation of material consumption in a real-time manner, and insure the material supply without any mistakes and delay. This paper introduces a material management information system that embedded bar code technology, object oriented database concepts (SQL Server 2000), Integrated Circuit Card technology, and network technology together, to improve the efficiency and accuracy of material supplement for bus storage industries.

Abstract

Busan city is the 2nd largest city of Korea and has been hosted many international events, such as the 2002 World Cup Final, the 2005 APEC summit, Draw and the 17th ITS World Congress. Even though the city has been established with the essential systems of a digital trans...Lead moreBusan city is the 2nd largest city of Korea and has been hosted many international events, such as the 2002 World Cup Final, the 2005 APEC summit, Draw and the 17th ITS World Congress. Even though the city has been established with the essential systems of a digital transport city, the U-Traffic system was introduced to integrate all ITS service on the basis of ubiquitous technologies and eco-friendly service. In this paper, an outline and major systems of the Ubiquitous Traffic system for Busan city are presented.

Abstract

Purpose of this study is a development of model which is transform route bus travel speed into general car travel speed. In order to, first, it make an analysis of route bus travel character. Second, it make an analysis of relationship between route bus travel speed and g...Lead morePurpose of this study is a development of model which is transform route bus travel speed into general car travel speed. In order to, first, it make an analysis of route bus travel character. Second, it make an analysis of relationship between route bus travel speed and general car travel speed. Finally, it is developing relationship model between route bus travel speed and general car travel speed. The model will be tested simulation and real data.

Abstract

As an important component of Intelligent Transportation System (ITS), Advanced Public Transportation System (APTS) plays an irreplaceable role in improving operational efficiency and service quality. A crucial issue of the development of APTS is the design and implementat...Lead moreAs an important component of Intelligent Transportation System (ITS), Advanced Public Transportation System (APTS) plays an irreplaceable role in improving operational efficiency and service quality. A crucial issue of the development of APTS is the design and implementation of Intelligent Scheduling sub-system. This paper presents an Intelligent Scheduling system that is able to optimize the operation for both planning and real-time control purposes. In this paper, the overall structure of the system is introduced first, followed by the descriptions of main system modules in detail. A case study is presented at last based on actual route, fleet and passenger information obtained from Jinan, China to demonstrate the operations of the developed system in both planning phase and real-time operation mode.

Abstract

Variable speed limit (VSL) control system can improve the safety more effectively than traditional Posted Speed Limit (PSL) control. This topic has received a significant amount of attentions from researchers worldwide. However, few experiences are available about impleme...Lead moreVariable speed limit (VSL) control system can improve the safety more effectively than traditional Posted Speed Limit (PSL) control. This topic has received a significant amount of attentions from researchers worldwide. However, few experiences are available about implementing a real responsive VSL system backed with advanced control algorithms that can take consideration of real-time traffic conditions. This paper presents the structure and algorithm of the VSL implemented on MD100 in Maryland, USA. The purpose of this system is to smooth the transition area between uncongested and heavily-congested segments more effectively so as to reduce the potential risk caused by sudden slow down, and improve the stop-and-go conditions. This system collects the data from traffic detectors and License Plate Recognition (LPR) systems in its real-time operation. The overall condition of the control segment and segment-by-segment conditions are estimated with travel time data and road-side detector data. The speed limits at two VSL stations are determined by the combination of pre-planned scenarios and real-time adjustment. This paper also provides detailed analysis of drivers’ responses to the displayed speed limits.

Abstract

The electronic fare collection system for public buses has been more and more popular in China and around the world. The convenience of such system has attracted a lot of frequent users. For example, the percent of bus passengers holding smart cards is almost 65% in the c...Lead moreThe electronic fare collection system for public buses has been more and more popular in China and around the world. The convenience of such system has attracted a lot of frequent users. For example, the percent of bus passengers holding smart cards is almost 65% in the city of Jinan, China by the end of 2009. The log of payment activities is a rich source for transit planners’ decision support. However, the most important information, Origin-Destination (OD) matrix of passenger demands of each bus route, cannot be easily determined because only boarding information is recorded on buses with fixed fares. This paper mainly focuses on providing an improved approach for estimating the passenger demand OD matrix for each bus route. First, necessary data filtering technique is applied to process the smart card data. Then, OD matrix of passenger trip is obtained by considering the connectivity and walking distance of individual transfer. Finally, passenger OD matrix for each bus route is estimated individually. Experiments were carried out with smart card data collected in Jinan, China on July 7, 2009. Results showed that the proposed approach provided a success rate of 75% in average for route OD matrix estimation, while reaching 85% in peak hours. The computed OD matrix is valuable to support trip demand estimation, bus dispatching and route optimization for planners and decision-makers.

Abstract

Intelligent transportation systems (ITS) provide a proven set of strategies for addressing the challenges of assuring safety and reducing congestion, while accommodating the growth in transit ridership and freight movement. The purpose of this study is to develop the ITS(...Lead moreIntelligent transportation systems (ITS) provide a proven set of strategies for addressing the challenges of assuring safety and reducing congestion, while accommodating the growth in transit ridership and freight movement. The purpose of this study is to develop the ITS(Intelligent Transportation System) evaluation using the transportation simulator

Abstract

This paper was performed to investigate effectiveness freeway non-stop tolling service under V2I wireless communications.This paper was performed to investigate effectiveness freeway non-stop tolling service under V2I wireless communications.

Abstract

Among modern industries fields, there are many areas that Korea is noticeably developing. Korea takes great pride particularly in the manufacturing the mobile cellular phones and that its service is the best in the world. There are many services that can be used with cell...Lead moreAmong modern industries fields, there are many areas that Korea is noticeably developing. Korea takes great pride particularly in the manufacturing the mobile cellular phones and that its service is the best in the world. There are many services that can be used with cellular phones including mobile services, internet, Locating Service, GPS, navigation and E-commerce transactions. The goal of this paper was to develop a way to pay expressway tolls using the mobile service of cellular phones.

Abstract

Today, Korean society experiences rapidly increasing distribution rate of in-vehicle display devices such as navigation or DMB, owing to the remarkable advance in IT. At the same time, the number of traffic accidents and violation of traffic regulations now increasing res...Lead moreToday, Korean society experiences rapidly increasing distribution rate of in-vehicle display devices such as navigation or DMB, owing to the remarkable advance in IT. At the same time, the number of traffic accidents and violation of traffic regulations now increasing resulted from drivers’ attention distraction when they are using the devices. In particular, since the in-vehicle display devices such as navigation temporally distracts driver’s visual or cognitive attention when they perform a unit task, drivers cannot help keeping eyes on a series of unit task to be completed. Accordingly, it is necessary to prepare adequate standards to make a guideline, especially in Korea. There are few empirical studies that employed experiments to support the rule of it. In this study, an experiment was conducted, using a driving simulator, to establish the proper standard of maximum distraction time per unit task to the extent that the in-vehicle display devices do not cause any hindrance on safe driving. A total of 25 participants participated in the experiment. Distraction span was manipulated by asking participants to perform the two tasks at once: while participants were driving as a primary task, they performed secondary task that counts the number of intersections in between the start point and the arrival point displayed on the screen. The results showed that the 2.0 second condition differed from the control condition in the deviation of distance from the car ahead, speed deviation, and the deviation in steering wheel, whereas there were no differences between the control condition and 1.0 or 1.5 second condition. Finally, limitations of the study, and implications of the findings with regards to the future studies and application of the Korea version of guideline for the in-vehicle display devices are discussed.

Abstract

Detector is policing device of height exceeding vehicle as it is installed on commercial vehicle entry lanes of business branches and it measures and records loading height of entry vehicles. In this thesis, alarm function is add to limit vehicle policing system so that w...Lead moreDetector is policing device of height exceeding vehicle as it is installed on commercial vehicle entry lanes of business branches and it measures and records loading height of entry vehicles. In this thesis, alarm function is add to limit vehicle policing system so that workers can recognize contamination and breakdown of Photo-eye of vehicles because weight exceeding vehicles enter highway without any policing due to causes such as contamination, breakdown and etc of Photo-Eye during operation of limit vehicle policing system and economic losses such as road repair cost and etc can be reduced by reducing road damages by weight exceeding vehicle entries.

Abstract

Korea government decided to reduce greenhouse gases 4 percentages comparing to that of year 2005. And, also we need to take an effor to save energy in the field of transportation. And also, we need to reply to the new needs of transportation. Therefore, it is urgent to im...Lead moreKorea government decided to reduce greenhouse gases 4 percentages comparing to that of year 2005. And, also we need to take an effor to save energy in the field of transportation. And also, we need to reply to the new needs of transportation. Therefore, it is urgent to improve transportation systems into low greenhouse gases, energy savings, and green growth oriented transportation systems. Intermodalism is a new paradigm for the new era of transportation systems. Intermodalism can make it possible to move people and freights from one place to another in the most efficient ways with two or more transport modes in a manner of low greenhouse gases and energy consumption. Intermodalism can reduce the dependancy on private automobiles and trucks for transporting passengers and freights. For implementing intermodalism, measures should be considered from many aspects. Firstly, network should be constructed efficiently for various modes. Secondly, physical facilities should be improved. Thirdly, fare system should be constructed integratedly. Forth, information system should be constructed efficiently. Lastly, institutional system should be prepared propely. The role of ITS for intermodalism is very important in many ways. ITS is especially important in software systems for intermodalism. For efficient operations of intermodal facilities, fare systems, and information systems, ITS can have an important role in implementing Intermodalism. This paper may search more various aspects of ITS for implementing intermodalism in the future.

Abstract

Since there is no compatibility between transmission equipment from different manufacturers that are used by Korea Expressway Corporation, each ring must be
organized with equipment from the same manufacturer and defective equipment cannot be replaced with equipment ...Lead moreSince there is no compatibility between transmission equipment from different manufacturers that are used by Korea Expressway Corporation, each ring must be
organized with equipment from the same manufacturer and defective equipment cannot be replaced with equipment from a different manufacturer. In addition, there is no compatibility even between equipment from the same manufacturer since there are differences in card size and standards. Because shelf and card size are different, rack standard also differs. This makes it difficult to find a location inside each rack. By promoting compatibility for each manufacturer and standardization of the cards, compatibility problem will be solved. By standardizing the cards, indiscriminate equipment abuse will be prevented and efficient management will become possible.

Abstract

This describes the improvement solution of temporarily rebooting the Variable Message Sign System (VMS) by turning OFF-ON at regional information center or remote location without having to deploy on site as an emergency situation in an event of error with no communicatio...Lead moreThis describes the improvement solution of temporarily rebooting the Variable Message Sign System (VMS) by turning OFF-ON at regional information center or remote location without having to deploy on site as an emergency situation in an event of error with no communication capability from HOLD ERROR in modem and controller within VMS due to rebooting, label error or broken label display etc.

Abstract

UTIS (Urban Traffic Information System) can be said to be main part of telematics and telematics mean a technology which provides safety and convenience service such as path information to passengers of cars, traffic information provision, emergency remedy information and...Lead moreUTIS (Urban Traffic Information System) can be said to be main part of telematics and telematics mean a technology which provides safety and convenience service such as path information to passengers of cars, traffic information provision, emergency remedy information and etc for maintaining & operating vehicles safe and conveniently using location information and wireless communication network as well as infortainment services such as Internet, movies, games and etc. UTIS is one field of services providing traffic information of telematics service and is a key of application service which can be developed as a big service of telematics through integration with toll collection such as mobile communication, Internet, DSRC and HI-PASS in the future besides provision of traffic information.