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Abstract

Currently, the traffic information provided by ITS is collected through the sensor and CCTV installed in limited areas and provided after a certain period of time due to the procedure of analysis and collection, which does not satisfy the traffic information requirement o...Lead moreCurrently, the traffic information provided by ITS is collected through the sensor and CCTV installed in limited areas and provided after a certain period of time due to the procedure of analysis and collection, which does not satisfy the traffic information requirement of the citizens and is insufficient to be utilized for emergency situations such as traffic safety management, disaster and accident etc. Therefore National Police Agency is leading the "Urban Traffic Information System (UTIS)" project to integrate the information management of all major cities since 2005. This paper reviews the domestic technology trend and UTIS establishment condition
focusing on Inchon City, and reviews utilization and connection plan of BIS/BMS communication network of UTIS system.

Abstract

In the traditional transportation service industry, mobile phones are widely used for driver contacts and vehicles position tracing for operation management; cargo shipping time and status are login manually, and the vehicles travel course are audited by the driving recor...Lead moreIn the traditional transportation service industry, mobile phones are widely used for driver contacts and vehicles position tracing for operation management; cargo shipping time and status are login manually, and the vehicles travel course are audited by the driving recorder afterwards. While in motion, both customers and managers are unable to know the vehicles position immediately, then some problems frequently happened such as cargo detention delivery, and unable to arrange the temporary order. There is no efficient management system in terms of vehicles over speed, halting pass time limit, and falling off the assigned travel routes. For long time, most drivers always try their luck, they do not drive according to the stipulations, then the traffic accident rate remains high, and enterprise goodwill are affected, the above situations make the transport business even more difficult.We will discuss how to combine the spacial information and wireless technology in this article, to help the transport industry to resolve the above mentioned problems, and provide the CVO system in accordance with standards of transportation service industry. The system will provide planning before transportation, real-time monitoring during transportation, traffic exception management, and reduce the total mileage, and provide the operation analysis after transportation, help transport service industry managers make decisions, and increase operation efficiency and lower cost, then help the proprietor resolve the problems and enhance the driving efficiency and security, in order to reduce the operation cost and thus they can provide high standard service, and the overall enterprise competence is improved.

Abstract

Recently as traffic congestion is intensified and the driver's demand for traffic information is intensifying, the section travel time is more accurate than point-based speed to show the road's traffic condition. Traffic information users also want accurate traffic inform...Lead moreRecently as traffic congestion is intensified and the driver's demand for traffic information is intensifying, the section travel time is more accurate than point-based speed to show the road's traffic condition. Traffic information users also want accurate traffic information for sectional traffic conditions. Therefore, the reliability of the data regarding the link travel time as well as the development of a high traffic information acquisition technique is vital. To estimate the appropriate number of cars required to collect traffic information some of the main decision factors are types of Probe cars (car model), running characteristic of the Probe cars, amount and accuracy of section traffic information data acquisition, and characteristics of subject roads (link extension, link traffic condition, etc). Based on these factors the number of appropriate Probe cars that were needed in Incheon was estimated

Abstract

The green growth in traffic is showing us its issue as a policy of green traffic was introduced to be applied as a new paradigm earlier in 1990s and the current central government considers the green growth as a major policy. The low carbon green growth in traffic can be ...Lead moreThe green growth in traffic is showing us its issue as a policy of green traffic was introduced to be applied as a new paradigm earlier in 1990s and the current central government considers the green growth as a major policy. The low carbon green growth in traffic can be defined as decreasing carbon exhaustion with maintaining the mobility and accessibility of traffic, and we will be able to expect the effect of two for one through promoting ITS ( Intelligent Transportation System). In this study, we intend firstly to consider the promoting processes of the domestic and foreign green traffic, secondly to think about the ITS promotion status in the green traffic, thirdly to consider the ITS in the green traffic and its relationship, fourthly to address the elementary technology of ITS for the green traffic, and finally to suggest development directions and promotion strategies to allow the policy of green traffic to take root as a traffic policy, which can last in South Korea in the future.

Abstract

To evaluate public transportation system, the concept of reliability is accepted the most important. Reliability can be calculated as on-time performance, headway adherence and so on. Seoul has the bus system that frequency of bus is less than 10 minute. Bus systems do no...Lead moreTo evaluate public transportation system, the concept of reliability is accepted the most important. Reliability can be calculated as on-time performance, headway adherence and so on. Seoul has the bus system that frequency of bus is less than 10 minute. Bus systems do not have to have a time table at each bus stop as the distance of among bus stop is short, have frequent headway and passengers usually do not care what time what time bus will be arrived. In this study, we developed the reliability index of bus services based on passenger’s cognition at a bus stop. We apply this index to Seoul bus lines which drive both isolated Bus Median Lane and Side Bus Lane. We found some significant result from Seoul case study that BML is tend to improve and maintain the reliability as bus drive a haul. It is because bus equipped BMS system which operated GPS. Bus drivers continuously tried to adjust headway from previous passed bus and follow bus. We compare this finding with survey result conducted in Seoul MBL satisfaction survey in 2007.

Abstract

As the part of Intelligent Transportation System, BIS(Bus Information System) takes the important role for efficient traffic operation and passenger-oriented convenience. BIS provides useful services not only passengers with information such as buses’ present location and...Lead moreAs the part of Intelligent Transportation System, BIS(Bus Information System) takes the important role for efficient traffic operation and passenger-oriented convenience. BIS provides useful services not only passengers with information such as buses’ present location and estimated arrival time but also drivers with information such as the interval between the front and the rear buses. In Korea, lots of cities including Seoul, Incheon, Bucheon, and Jinju have adopted BIS and about 30 local governments are establishing BIS at present. Each local government operates BIS and manages bus companies which are only belong to its zone. It brings out unsatisfied and missing bus information because some bus lines linked with adjacent cities are not considered in the scope of analysis. Especially, not enough bus information are provided to the metropolitan buses which have long distance routes. Therefore, evaluation index for the effect of BIS in terms of metropolitan characteristics should be developed in order to improve public transportation services for all the citizens in capital area. In this study, we come up with the criteria for evaluating metropolitan bus information system by keeping pace with the current project of metropolitan BIS and through the review of analysis about existing BIS projects. The pre-evaluation and ex-post evaluation for bus related projects will be also examined.

Abstract

UTIS is a system that carries out the basic function of traffic information collection and also serves as the base for providing various ITS services. In Korea it is being planned or is being constructed by each local government in the capital area. UTIS of Incheon which ...Lead moreUTIS is a system that carries out the basic function of traffic information collection and also serves as the base for providing various ITS services. In Korea it is being planned or is being constructed by each local government in the capital area. UTIS of Incheon which was constructed by DB Communication&Systems is the only system that is currently being operated in Korea. During construction of 1st and 3rd UTIS of Incheon, many problems like heterogeneous equipment, standard applied equipment and shadow section equipment occurred. In this paper, improvements that were made while solving these problems will be examined through examples. Pointers are presented so trial and error can be reduced in future UTIS projects that will be carried out by other local governments.

Abstract

For providing an energy saving route guidance by the navigation system, it is efficiency not only to find the shortest route and congested routes but also to use the altitude information of the candidate routes. This paper considers the relation of the altitude informatio...Lead moreFor providing an energy saving route guidance by the navigation system, it is efficiency not only to find the shortest route and congested routes but also to use the altitude information of the candidate routes. This paper considers the relation of the altitude information and the energy saving route by setting the actual sloping routes and taking the fuel consumption data on these routes. We investigate the future energy saving route guidance method from these examinations.

Abstract

Generally, optimum shortest path algorithms adopt single attribute objective among several attributes such as travel time, travel cost, travel fare and travel distance. On the other hand, multi-objective shortest path algorithms find the shortest paths in consideration wi...Lead moreGenerally, optimum shortest path algorithms adopt single attribute objective among several attributes such as travel time, travel cost, travel fare and travel distance. On the other hand, multi-objective shortest path algorithms find the shortest paths in consideration with multi-objectives. Up to recently, the most of all researches about multi-objective shortest paths are proceeded only in single transportation mode networks. Although, there are some papers about multi-objective shortest paths with multi-modal transportation networks, they did not consider transfer problems in the optimal solution level. In particular, dynamic programming method was not dealt in multi-objective shortest path problems in multi-modal transportation networks. In this study, we propose a multi-objective shortest path algorithm including dynamic programming in order to find optimal solution in multi-modal transportation networks. That algorithm is based on two-objective node-based label correcting algorithm proposed by Skriver and Andersen in 2000 and transfer can be reflected without network expansion in this paper. In addition, we use non-dominated paths and tree sets as labels in order to improve effectiveness of searching non-dominated paths. We also classifies path finding attributes into transfer and link travel attribute in limited transit networks. Lastly, the calculation process of proposed algorithm is checked by computer programming in a small-scaled multi-modal transportation network.

Abstract

This paper aims at examining the thermal influence of vehicle related heats (vehicle heats) on the road surface temperature and evaluating the validity of a vehicle heat road freezing forecasting (VHRFF) model proposed by the present authors. Vehicle heats consist of the ...Lead moreThis paper aims at examining the thermal influence of vehicle related heats (vehicle heats) on the road surface temperature and evaluating the validity of a vehicle heat road freezing forecasting (VHRFF) model proposed by the present authors. Vehicle heats consist of the tire frictional heat, the vehicle radiant heat and the vehicle sensible heat due to vehicle induced wind velocity. In order to calculate the road surface temperature in a vehicle-passage area, the total vehicle heat flux in addition to metrological heat fluxes is included in a heat balance equation of the road surface layer. A thermography observation targeted a roadway near a traffic light in Fukui city that has two-three lanes each way. Stopping and starting of vehicles (vehicles stop and go) are always repeated due to the traffic light on only one side. It was shown that the difference in the road surface temperature on the lane between with and without the vehicles stop and go became clear as an atmospheric temperature fell. The former was about 3.5°C higher than the latter in the nighttime. This is caused by the tire frictional heat and the vehicle radiant heat. The validity of the VHRFF model was identified by comparing the calculated road surface temperature with the experimental one obtained from the thermography observation. The VHRFF model could reproduce almost the same temperature rise due to the vehicle heats as the outcome of the thermography observation.

Abstract

In the study of transportation, the free-flow speed is one of important variables, which are often used to estimate and/or quantify the effects of various ITS technologies. In Korea, the free-flow speeds on expressway determined in the 1990s have been used in many transpo...Lead moreIn the study of transportation, the free-flow speed is one of important variables, which are often used to estimate and/or quantify the effects of various ITS technologies. In Korea, the free-flow speeds on expressway determined in the 1990s have been used in many transportation studies without careful improvements. However, it is possible that the free-flow speeds on expressway have been changed because the free-flow conditions on expressway are highly likely to be affected by numerous time-variant factors such as vehicle performances, roadway geometric conditions, and human factors. Therefore, it is imperative to reassess the free-flow speeds on expressway in Korea by reflecting the change in the factors over time. Recognizing this challenge, this study attempts to determine the free-flow speeds on expressway in Korea by utilizing the Automatic Vehicle Classification (AVC) data collected from 95 sites on expressway in Korea. To capture the free-flow speeds, roadway segments were first classified by the number of lanes, and the peak period data were excluded in this study. By using the observed non-peak speed and traffic volume data, this study developed speed-flow curves and determined the free-flow speeds. It is highly expected free-flow speeds determined in this study are somewhat different from those in the past studies. Hence, it is necessary to improve the free-flow speeds on expressway in Korea by reflecting the results of this study.

Abstract

A harmonic rejection bandpass filter (BPF) introduced in this article. This filter designed Tapped-line geometry and, using Meander spurline to reject harmonic components. The tapped-line structure suggested in this paper designed simple and accurate. As the inverter real...Lead moreA harmonic rejection bandpass filter (BPF) introduced in this article. This filter designed Tapped-line geometry and, using Meander spurline to reject harmonic components. The tapped-line structure suggested in this paper designed simple and accurate. As the inverter realized meander spurline, the parasitic mode has suppressed and size reduced about 20% at the same time. To validate the design, a prototype of λ/4 short stub bandpass filter was fabricated and measured. Designed bandpass filter fabricated substrate at dielectric constant of 2.54, thickness of 0.54 mm. The measurements are insertion loss of 1.3dB, return loss of 10.3dB at center frequency of 2.45GHz and bandwidth of 12.2%.

Abstract

In the field of traffic safety, the detection of bad weather, such as visibility, heavy rain, snow, and a large number of stagnant water, and landslides, collapses, falling rocks and other important factors that affect traffic is particularly important. These adverse natu...Lead moreIn the field of traffic safety, the detection of bad weather, such as visibility, heavy rain, snow, and a large number of stagnant water, and landslides, collapses, falling rocks and other important factors that affect traffic is particularly important. These adverse natural disasters often lead to serious traffic accidents. Through in-depth analysis and research on video image features of meteorological hazards and natural traffic environmental disasters, we research and develop meteorological and environmental analysis detection system of traffic video. This system fully develops and expands the video camera function of the existing traffic system, to achieve low-cost, large coverage safety detection.

Abstract

In VANET(Vehicle Ad hoc NETwork) environment, the moving vehicles transmit data through broadcast. For reducing the data transmission errors when the channels between transmitters and receivers are getting unstable, XOR based Buffer Coding scheme is proposed in this paper...Lead moreIn VANET(Vehicle Ad hoc NETwork) environment, the moving vehicles transmit data through broadcast. For reducing the data transmission errors when the channels between transmitters and receivers are getting unstable, XOR based Buffer Coding scheme is proposed in this paper. Network Coding is used in wireless communication for reducing the network overhead and enhancing the throughput of the network. XOR based Buffer Coding is a novel Network Coding based on the RTS/CTS/ based handshaking method.

Abstract

In order to reduce greenhouse gas emissions, the preliminary question which must be set is how to measure it precisely. There are many factors which affect the amount of vehicle-produced emissions, including the kind or size of vehicle, driving speed, the grade of the roa...Lead moreIn order to reduce greenhouse gas emissions, the preliminary question which must be set is how to measure it precisely. There are many factors which affect the amount of vehicle-produced emissions, including the kind or size of vehicle, driving speed, the grade of the road, etc. Vehicles break down into passenger's car, bus, truck, and so forth and this is further complicated by breakdown into manual or automatic drive and the kinds of fuels used. The amount of emissions varies depending on which one of these factors applies. This paper presents an estimation of CO2 emissions as a result of TCS (Toll Collection System )deployment in Kyongbu expressway, a large-scale traffic network. Other important feature of this paper is disaggregate spatial estimation and analysis of the emissions of motorway instead of aggregate national-wide estimations in road (including various kind of road) The presented model calculates CO2 emissions for each vehicle type based on their speeds which is estimated using enter & exit time from TCS data set, for each section divided by IC(Interchange)

Abstract

Base on the advanced traffic flow video multi reuse and high-definition video detection technology, design and develop urban traffic video integrated detector. The detector can make full use of existing video resources to achieve comprehensive monitoring capabilities, inc...Lead moreBase on the advanced traffic flow video multi reuse and high-definition video detection technology, design and develop urban traffic video integrated detector. The detector can make full use of existing video resources to achieve comprehensive monitoring capabilities, including traffic incident detection, traffic-flow volume detection, vehicle license plate recognition, vehicle violation detection, vehicle blacklist detection and real-time remote monitoring, of urban intersections, entrances and exits of highway and expressway routes. The detector can also provide traffic information needed by intersection signal controllers, including switch traffic flow data, travel time, comprehensive traffic flow data and traffic flow incident information, and to achieve traffic signal controllers of urban intersections or entrances and exits of highway, and to improve the capability of manager to the integrated monitoring, effective coordination and traffic control of urban road network.

Abstract

The cable network for Intelligent Transport Systems (ITS) deployed on expressways in Korea is configured using the copper cable and the fiber-optic cable. Recently, it has become a tendency that only the fiber-optic cable is for the communication lines but the copper cabl...Lead moreThe cable network for Intelligent Transport Systems (ITS) deployed on expressways in Korea is configured using the copper cable and the fiber-optic cable. Recently, it has become a tendency that only the fiber-optic cable is for the communication lines but the copper cable is not used any more. In addition, the existing equipment that uses the copper cable is being replaced with the one using the fiber-optic cable. Main reason for such replacement is because the fiber-optic cable is resistant to erosion and population, free of interference from noises and capable of long-distance transmission at low transmission loss while the copper cable is vulnerable to surge and provides low communication quality. Along with such trend, new types of ITS have been introduced and their quantities have also increased, causing the fiber-optic cable to be saturated in which the number of fiber-optic cores is short. It is possible to solve this problem by increasing the fiber-optic cable but the expected effect in comparison to the investment is relatively low. Upon this, this study intends to improve the cable communication network using the communication equipment rather than using the line. This paper proposes a optimization plan to design a proper communication equipment configuration system depending on the data type of the information obtained from or to be provided to the system, and to configure a communication network by combining the cable and the wireless networks depending on the installation environment.

Abstract

Following increase of vehicles and road complexity, dangerous driving and driver distraction are becoming principal reasons for traffic accident. According to statistics of Korean National Police Agency, more than half of all traffic accidents were incurred by dangerous d...Lead moreFollowing increase of vehicles and road complexity, dangerous driving and driver distraction are becoming principal reasons for traffic accident. According to statistics of Korean National Police Agency, more than half of all traffic accidents were incurred by dangerous driving. Various efforts are being implemented to settle this problem which include recording of drivng data using blackbox, driver education or reinforcement of traffic laws and regulations. This study presents development of a safe driving management system and its application. Based on prior study, we classified dangerous driving maneuvers into 16 cases which consist of 10 single maneuvers and 6 combined, and we also suggested a dangerous driving detection algorithm and reasonable threshold for each maneuver. To validate effectiveness of dangerous driving detection algorithm and safe driving management system, we tried to apply system to commercial buses and passenger cars. After data collection for a few months in real traffic condition and analysis of data, we found distinctive features about dangerous driving maneuvers. They were frequent in some vehicle speed ranges, and infrequent in the other ranges. Furthermore, they were frequent in some times in a day or week, and infrequent in the other times. With this research, we tried to approach to the problem at the bottom. Along with further application in real-time monitoring and driver warning, or with driver education using driving simulator, we expect that traffic accidents will be reduced and social demand for construction of safe driving environment will be realized.

Abstract

Traffic information on road conditions need be transmitted accurately and swiftly to guarantee optimal travel paths and control traffic jam. This paper is to introduce the gossip networking technology that has recently been suggested as an alternative means of sending tra...Lead moreTraffic information on road conditions need be transmitted accurately and swiftly to guarantee optimal travel paths and control traffic jam. This paper is to introduce the gossip networking technology that has recently been suggested as an alternative means of sending traffic information and to attempt modeling and simulation of such technology applied in the field to find out relevant performance. Gossip networking refers to collecting traffic information on road conditions through communication between vehicles and grasping the situation based on information collected as such. Gossip networking is implemented with UIS module that collects and re-broadcasts traffic information sent from UVS module corresponding to vehicles, and UTC module that aggregates and manages the information from the UIS module. Each module is configured with a tiered structure leading to a system. In the study, each module of gossip networking technology is represented as a model using DEVS formalism, one of the methodologies used for modeling discrete events. Also, a scenario is simulated taking movements in actual environment into account to assess the performance of gossip networking and determine its applicability to the traffic environment system in the field.

Abstract

CCTV housing is a structure to protect the camera and lens from dust, moisture and impact so that the camera can work at all times at its optimum condition. Though the housing has been rarely treated very important as it is cheaper than the camera or the lens and does not...Lead moreCCTV housing is a structure to protect the camera and lens from dust, moisture and impact so that the camera can work at all times at its optimum condition. Though the housing has been rarely treated very important as it is cheaper than the camera or the lens and does not require advanced technology, it still plays an important role in maintaining the performance of CCTV. For the housings installed outdoor, a wiper and a heat wire are attached to the monitor window, to prevent the video quality from being degraded by dew condensation, rain drops or dust, or compressed air is used to blow away dust or other impurities. Even though such electronic or mechanical technology is introduced, however, it is difficult to secure the monitor view under inadequate environment including snowstorm or unfavorable wind in which snow is stuck to the front glass of the housing. Sometimes, a fault in the system may interfere with the monitoring function. In other words, if the wiper stops working at the center of the front glass of the housing or the heater sensor does not work properly causing high temperature to badly affect the camera operation. This paper examines the cases of operation of the housing that determines the monitoring performance of CCTV, analyzes the features of the housings with auxiliary functions, and then proposes an improved housing design method. The housing fabricated by the improved design method and the one by the existing method are tested under a poor operation environment, to verify the validity of the proposed method.

Abstract

Traffic congestion incurs a lot of personal and social expenses and especially the accidents including cars malfunctioning on the road result in personal and material loses in addition to traffic congestion. The traffic control center operator and/or administrator can min...Lead moreTraffic congestion incurs a lot of personal and social expenses and especially the accidents including cars malfunctioning on the road result in personal and material loses in addition to traffic congestion. The traffic control center operator and/or administrator can minimize the damages by promptly detecting such accidents and taking proper actions. As CCTV helps detect the accident promptly, ensure the safety of victims, and reduce the traffic stoppage time, the installation of CCTVs is rapidly increasing. Despite the increase in the number of CCTVs installed, the standard of CCTV installation has not yet been standardized, so that different manufacturers are using different pan/tilt specifications. This paper points out the problems caused by the use of different specifications and develops the integrated bracket that can accommodate different specifications at a low cost.

Abstract

U-ITS(Ubiquitous Intelligent Transportation System) has more higher dispersive characteristics versus the existing ITS and it means high standard of openness, compatibility and mutual management are required for U-ITS. That is to say, the system of U-ITS’ Complexity metri...Lead moreU-ITS(Ubiquitous Intelligent Transportation System) has more higher dispersive characteristics versus the existing ITS and it means high standard of openness, compatibility and mutual management are required for U-ITS. That is to say, the system of U-ITS’ Complexity metric can be complicated more and more. For realizing overall U-ITS system, not only did the system overcome complexity metric problem but the development process, core technology based on architecture, is also needed. Furthermore, the basic technologies of ubiquitous should be connected intimately together, or, ubiquitous transportation environment can’t be established successfully. The purpose of this study is to suggest the hybrid-model and dual methodology for architecting. Hybrid - model is optimized for making architecture framework which provides user - friendly, efficient and safe transportation service.

Abstract

Bus Information and Management System (BIS/BMS) using GPS Position Tracking Technology and Wireless Transmission Technology has already been verified effective and successful, and it has being applied in several big cities. However, it is a common opinion that it is no mo...Lead moreBus Information and Management System (BIS/BMS) using GPS Position Tracking Technology and Wireless Transmission Technology has already been verified effective and successful, and it has being applied in several big cities. However, it is a common opinion that it is no more difficult to maximize the detection rate that is a key element of the bus location information accuracy because of the BMS OBU(On-Board Unit) based the Node data only and the fundamental error of GPS. This document provides an overview of the bus position tracking method using the Link data which it can improve the node detection rate dramatically. I will call this technique, “Link-based Map-matching method”. This technique was applied to bus information management system in Incheon metropolitan city, and showed a great performance. I will introduce the Link-based Map-matching method and Incheon case through this document.

Abstract

In Korea, tollgates are installed and put in operation at the point of entry into the expressways in order to collect the toll from the vehicles that use the expresses. The toll collection systems installed at the tollgates are divided into mechanical tolling system and e...Lead moreIn Korea, tollgates are installed and put in operation at the point of entry into the expressways in order to collect the toll from the vehicles that use the expresses. The toll collection systems installed at the tollgates are divided into mechanical tolling system and electronic tolling system, each of which is configured with multiple pieces of equipment As the toll policy and the specifications of the vehicles passing through the tollgates changed, new systems have been installed, most of which are electronic equipment and protective structures for the equipment. This paper makes a study of an integrated structure that enables systematic installation, operation, and management of various types of equipment installed in the tollgates, and proposes its design. The proposed integrated structure is designed for the lanes for which Hipass system, the electronic tolling system, has already been deployed but the mechanical tolling system is left for future study. Since the Hipass system lanes are operated unattended, many structures are installed to prevent accidents. For this reason, the proposed integrated structure aims at improving the quality of system operation. In order to design the integrated structure, this paper analyzes the equipment deployed on the Hipass lanes, defines the items of which improvement can result in the improved operating quality of the equipment, and suggests the expected effects.

Abstract

The concept of ‘Ubiquitous’ has been generalized since Mark Weiser had suggested ‘Ubiquitous computing’ paradigm in 1998. It means that people interact with computer at anytime wherever they are. It doesn’t need people’s consciousness of using computer themselves and all ...Lead moreThe concept of ‘Ubiquitous’ has been generalized since Mark Weiser had suggested ‘Ubiquitous computing’ paradigm in 1998. It means that people interact with computer at anytime wherever they are. It doesn’t need people’s consciousness of using computer themselves and all procedures are processed invisibly. In other words, Ubiquitous computing is human-centered computing environment. With this Ubiquitous computing technology and paradigm, transportation system can be developed as U-ITS(Ubiquitous Intelligent Transportation System). U-ITS is state of the art in the field of ITS as it can surpass the limit of existing ITS’ restricted technology and external factors. The purpose of this study is to analyze the characteristics of U-ITS and suggest ‘service-definition-template’ in order to create appropriate U-ITS services, and what is more important, U-ITS services should be evaluated properly how U-ITS services close to the ubiquity. Because of that, Ubiquity quotient(UQ) which is able to measure the degree of ubiquity about U-ITS services will be developed in this study for defining each services’ ubiquity requirements.

Abstract

Right turns have the potential to give heavy work load to drivers at an intersection, because the driver has to judge the headway in oncoming traffic while avoiding pedestrians in the crosswalk. This study investigated the data transmission performance of DSRC (5.8GHz) ty...Lead moreRight turns have the potential to give heavy work load to drivers at an intersection, because the driver has to judge the headway in oncoming traffic while avoiding pedestrians in the crosswalk. This study investigated the data transmission performance of DSRC (5.8GHz) typed Pedestrian-Vehicle communication to avoid conflict between right-turn vehicle and pedestrians in the crosswalk. We conducted a field experiment to measure transmission performance at three actual intersections. This study found that the vehicles during approaching to the intersection and taking a right turn could communicate with the pedestrians approaching from both right and left side.

Abstract

This paper is introducing the Daegu Bus Management System(BMS) case which was improved the accuracy of the bus information using Zigbee communication. Daegu metropolitan city installed BMS to provide the citizen with the real-time bus position and arrival time for active ...Lead moreThis paper is introducing the Daegu Bus Management System(BMS) case which was improved the accuracy of the bus information using Zigbee communication. Daegu metropolitan city installed BMS to provide the citizen with the real-time bus position and arrival time for active public transport in August 2006. The bus position is collected by bus On Board Unit(OBU) and transmitted to bus management center through CDMA . And the time of arrival of next buses is served to the citizens through installed Bus Information Terminal (BIT) at bus stop. However, in metropolitan city such as Deagu, both the traffic congestion and the short interval between bus stops were able to make the error of inaccuracy of estimated arrival time. For example, it was occurred problem which display “Arrival Soon” information continuously after bus passes. This can cause several problems such as citizen’s complaint or inconvenient. To solve this problem, Zigbee has been applied to the secondary network between bus and bus stop. This resolved the time lag of “Arrival Soon” information and improved the accuracy of bus arrival information. As a result using the secondary network, the accuracy of information was analyzed as a very good by 99.67%.

Abstract

In the bus information system, mobile communication is given much weight. Mobile communication is a basic means of collecting, processing, and providing necessary data. In Korea, almost all bus information systems use CDMA. However, due to such problems as resource sharin...Lead moreIn the bus information system, mobile communication is given much weight. Mobile communication is a basic means of collecting, processing, and providing necessary data. In Korea, almost all bus information systems use CDMA. However, due to such problems as resource sharing with general voice call networks and data communication networks and connection delay, the demand for alternative networks is getting greater. This paper proposes a method of applying Wibro to the bus information system. It also examines the shuttle bus information system deployment project on Goyang City, by applying Wibro communication network for locating buses in real time and for providing information to the drivers and to the bus information terminal.

Abstract

This Paper is regarding Advanced Passenger processing in the airport using latest biometric technology based on e-Passport. It’s included Analysis result of several major facial recognition system's performance on real airport environment. With this analysis result, Airpo...Lead moreThis Paper is regarding Advanced Passenger processing in the airport using latest biometric technology based on e-Passport. It’s included Analysis result of several major facial recognition system's performance on real airport environment. With this analysis result, Airport Authority could prepare deployment of automatic immigration clearance gate for passengers who have e-passport in near future. So, airport could have better performance of passenger processing with more speed, convenience and high level security.

Abstract

Connectivity and transfer information for the means of public transport is mostly provided via web. However, it is very inconvenient to use the web during travel and thus there are many limitations in using the web service during travel. This paper proposes an efficient m...Lead moreConnectivity and transfer information for the means of public transport is mostly provided via web. However, it is very inconvenient to use the web during travel and thus there are many limitations in using the web service during travel. This paper proposes an efficient method of providing the intermodal transfer information using the personal digital assistant and the connectivity information terminals installed at the transfer center, based on the popularization of wireless network environment and smart phones.

Abstract

Traveler trip plans currently serviced by portal sites calculate the total trip time considering most of transfer centers simply as transits. However, the time required for transfer accounts for a large percentage of the entire trip time and thus it significantly affects ...Lead moreTraveler trip plans currently serviced by portal sites calculate the total trip time considering most of transfer centers simply as transits. However, the time required for transfer accounts for a large percentage of the entire trip time and thus it significantly affects how to promote people’s use public transport. This paper proposes a plan to improve the quality of transfer service and thus promote the use of public transport, by minimizing the transfer time through optimization of the time required for transfer at the transfer center or by providing the expected time required for transfer.

Abstract

‘On-time delivery is the most important key goal in air cargo terminal operation. Therefore, if export operation is delayed, it is negative to the goal of air cargo terminal, also to the competitive of the country and the brand image of airlines. Also, In 2009 the volume ...Lead more‘On-time delivery is the most important key goal in air cargo terminal operation. Therefore, if export operation is delayed, it is negative to the goal of air cargo terminal, also to the competitive of the country and the brand image of airlines. Also, In 2009 the volume of export cargo has increased 6.4% compared to 2008. However, despite the increasing rate it is considered that we are still behind the competitors such as Japan, Hongkong and Singapore in terms of quality in cargo process technology. At this point RFID technology, which has capability of batch reading, real time identification, transparency to the object and fast processing, looks promising because it could bring competitiveness in cargo business area. However, due to high cost associated with its adoptions, careful investigation with precise analysis on the process and clear development on the specific application process are required. Recently there have been many studies on the RFID which analyze expected benefits in logistics area. However, it is not easy to apply such studies to the industry because, in many case, they omitted detail characteristics of technology or application method. In this study, we propose by reporting the location of cargo with SGLN code, the accuracy of the location information is improved from the current process in where the location identification is done manually. Also, by storing the location information into the system, working time can be reduced. A new RFID based process for storage and picking where the location identification is not easy task and compared the new process with conventional processing using simulation.

Abstract

This study is to suggest a system transmitting traffic information at a low cost based on V2V, or inter-vehicle communication. The system measures and transmits information in a vehicle.As it is necessary to know the location of information generated, the system represent...Lead moreThis study is to suggest a system transmitting traffic information at a low cost based on V2V, or inter-vehicle communication. The system measures and transmits information in a vehicle.As it is necessary to know the location of information generated, the system represents locations with minimum data by segmenting roads and marking locations with road numbers and segment numbers. Each vehicle upon entering a segment aggregates nformation sent from the vehicle ahead and its own data to send the result to another vehicle following. When there is no car in the rear within the communication radius, the information is discontinued. Then information is aggregated periodically and sent to the vehicle, if any, in the rear. In segment-less sections of roads, information is transmitted based on traveling distances. The V2V (vehicle to vehicle) information transmission based on aforesaid three modes can even send information to vehicles at a long distance.

Abstract

This paper introduces a design of parking information and guidance system which can be operated with reduced energy, for meet the latest low carbon emission needs of tall buildings. The designed system is based on a pre-developed micro power inductive loop vehicle detecto...Lead moreThis paper introduces a design of parking information and guidance system which can be operated with reduced energy, for meet the latest low carbon emission needs of tall buildings. The designed system is based on a pre-developed micro power inductive loop vehicle detectors of our company, MORU Industrial Systems. The system consists of a large amount of parking space detectors, passing vehicle count detectors, turnoff guidance displays, section displays, entrance display, car location guidance terminals, wireless communication repeaters and control units. The design of system contains architecture design, communication network design, parking information and parking guidance service scenario design, and battery life balancing. The preliminary estimation result for operating power shows that the designed parking nformation and guidance system can operate with remarkably small energy, with no driver convenience reduction.

Abstract

This paper presents a method of applying RFID to an air cargo terminal. Currently the portion of air freight is increasing among global supply chain. As demand for air cargo delivery is increasing rapidly since the second half in 2009, the effort to manage air cargo is gr...Lead moreThis paper presents a method of applying RFID to an air cargo terminal. Currently the portion of air freight is increasing among global supply chain. As demand for air cargo delivery is increasing rapidly since the second half in 2009, the effort to manage air cargo is growing. Especially the real-time management of air cargo using identification technologies is emphasized and various studies and businesses to construct information infrastructure are carried out these days. In this situation, many advanced countries try to develop the air cargo management system in real-time for air logistics. In order to apply RFID to an air cargo terminal and construct information infrastructure for air cargo management in real-time, this research follows the structure hereunder. - Analyzing international standard - Analyzing environmental facts in which RFID will be applied in an air cargo terminal - Measuring performance of RFID in an air cargo terminal in which RFID will be applied - Analyzing spectrum in an air cargo terminal in which RFID will be applied - Proposing a guideline for applying RFID to an air cargo terminal The object of this study is to provide as a model for how RFID can be effectively applied to an air cargo terminal.

Abstract

Automatic sequencing and scheduling of arrival flights with safe spacing in a terminal airspace was studied as an algorithm which can be applied to a decision support tool for air traffic controllers. For the efficient use of a limited airspace, the discrete delay time op...Lead moreAutomatic sequencing and scheduling of arrival flights with safe spacing in a terminal airspace was studied as an algorithm which can be applied to a decision support tool for air traffic controllers. For the efficient use of a limited airspace, the discrete delay time options corresponding to the predetermined available trajectories or command modes are used as the control variables in sequencing and scheduling of flights. In the author’s previous works, a Genetic Algorithm, a Branch-and-Bound algorithm and a polynomial time algorithm, which is based on a minimum cost perfect matching problem, are developed for wide range of scenarios with various operational constraints, such as Maximum Position Shift or precedence constraints as well as discrete delay time options, and the performances of the proposed algorithms are compared through simulation study using illustrative flight data and real flight data of Gimpo airport in Korea. In this study, in order to extend the optimal scheduling problem at a single merging point, which was dealt with in the previous works, into the scheduling problem of multiple merging points in an entire terminal airspace, an interaction model of the formulated static optimization problems and the dynamic air traffic estimation model is proposed. Through simulation studies, it is verified that the proposed algorithms are capable of solving the optimal scheduling problem in a reasonably short time to cooperate with the dynamic traffic flow estimation model.

Abstract

Abstract ? this paper proposes USN-based software agent approach to traffic management which utilizes wireless sensors, wireless APs (access points) and central traffic controller. Since thousands of thousand sensors installed on the roads in a huge physical area send and...Lead moreAbstract ? this paper proposes USN-based software agent approach to traffic management which utilizes wireless sensors, wireless APs (access points) and central traffic controller. Since thousands of thousand sensors installed on the roads in a huge physical area send and receive through wireless coordinators and AP traffic data such as vehicle detection, classifications and speed measurements, a central traffic controller utilizes software agents to produce meaningful information for users, and to control distributed software agents. Particularly, it is of paramount importance to relate time-specific, location-specific and contents-specific information one way another. This paper reviews the recent updates of advanced methodologies for vehicle detection and classification sensors, USN network elements such as wireless coordinators (Zigbee) and AP (Wi-Fi or WiMAX(Worldwide Interoperability for Microwave Access)), and RIA (Rich Internet Application)-based user interfaces. This paper also introduces an application of new standards KML (Keyhole Markup Language) in conjunction with software agents.

Abstract

The volumes of metropolitan areas account for 57% of entire expressway as the areas expand with a land development plan. The multidirectional methods are having been studied to solve the congestion as the traffic volumes are growing faster than expected. Especially, HANAM...Lead moreThe volumes of metropolitan areas account for 57% of entire expressway as the areas expand with a land development plan. The multidirectional methods are having been studied to solve the congestion as the traffic volumes are growing faster than expected. Especially, HANAM Junction is congested by the traffic volumes of regular commuters because of lacks of capacity in the ramp and ramp junction. To solve this problem, alternative analysis was made for the capacity control and entrance control. The LCS that increases the capacity by using shoulder as driving lane was chosen as optimum alternative considering the condition of HANAM Junction. The simulation analysis was implemented to verify the effectiveness of application of LCS. The results showed that there was 20km/h increase of speed. The LOS and v/c improved from D to C and 0.89 to 0.56 respectively. It generated 15milion dollars as benefit cost and proved that effectiveness of benefit was outstanding.

Abstract

Hi-Speed Railway runs at the speed up to 300Km/h and is complex system that works many electronic devices and machines together. Its system complexity is very high, so sensors that check the system status and communication systems are very important. And sensors installed...Lead moreHi-Speed Railway runs at the speed up to 300Km/h and is complex system that works many electronic devices and machines together. Its system complexity is very high, so sensors that check the system status and communication systems are very important. And sensors installed this kind of hi-speed railway make data that is several Mbytes per minute, so measurements for trains usually use wire-based networks. Most of trains are divided into two part, up-side and down-side. And sensors for important data are attached in down-side, but monitoring servers and monitoring equipments are installed in up-side. Here is problem. When up-side and down-side is divided because of maintenance etc, wired network between up-side and down-side has to remove, and after repairing, connect again. If trains use 6LoWPAN to remove this kind of inconvenience, data wire can be eliminated. In addition, If trains use a high-speed wireless mobile communication network like HSDPA, it’s possible to send monitoring data, that is collected in inside of trains, at the server of outside remote place. Thus it can be a central control system.

Abstract

In this research, automatic control algorithm is proposed that can prevent user’s overreaction and road concentration problem caused by VMS. The proposed algorithm uses route diversion probability from estimated traffic condition of alternative routes after active detour ...Lead moreIn this research, automatic control algorithm is proposed that can prevent user’s overreaction and road concentration problem caused by VMS. The proposed algorithm uses route diversion probability from estimated traffic condition of alternative routes after active detour information is displayed. This algorithm determines when VMS active detour information is given and finished automatically by real-time traffic information from Intelligent Transportation Systems (ITS). There exist two assumptions in this paper. First, the algorithm is developed especially for a simple hypothetical network with two alternative routes. Second, drivers choose their routes with route diversion probability based on probability utility theory after active detour information is shown. Moreover, explanatory variables that affect alternative routes choice are chosen such as distance between detour point and VMS, VMS contents, traffic situation of alternative route 1, 2, remaining distance to destination. As a result, it is expected that active detour strategies considering traffic condition can be carried out through the suggested algorithm in this paper. Moreover, the following second detour strategies can be fulfilled rapidly and reasonably by using finish decision module for detour information reflected previous VMS detour strategies. However, in this study, the validation for algorithm’s application possibility and credibility is not performed yet. Thus, algorithm’s each module and model should be verified through continuous researches in order to enhance the algorithm’s credibility in the future.