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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Journal of The Korea Institute of Intelligent Transport Systems
Journal Basic Information
Journal DOI :
The Korea Institute of Inteligent Transport Systems
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Volume & Issues
Volume 15, Issue 4 - Aug 2016
Volume 15, Issue 3 - Jun 2016
Volume 15, Issue 2 - Apr 2016
Volume 15, Issue 1 - Feb 2016
Selecting the target year
Development for City Bus Dirver's Accident Occurrence Prediction Model Based on Digital Tachometer Records
Kim, Jung-yeul ; Kum, Ki-jung ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 1~15
DOI : 10.12815/kits.2016.15.1.001
This study aims to develop a model by which city bus drivers who are likely to cause an accident can be figured out based on the information about their actual driving records. For this purpose, from the information about the actual driving records of the drivers who have caused an accident and those who have not caused any, significance variables related to traffic accidents are drawn, and the accuracy between models is compared for the classification models developed, applying a discriminant analysis and logistic regression analysis. In addition, the developed models are applied to the data on other drivers' driving records to verify the accuracy of the models. As a result of developing a model for the classification of drivers who are likely to cause an accident, when deceleration (
) and acceleration to the right (
) are simultaneously in action, this variable was drawn as the optimal factor variable of the classification of drivers who had caused an accident, and the prediction model by discriminant analysis classified drivers who had caused an accident at a rate up to 62.8%, and the prediction model by logistic regression analysis could classify those who had caused an accident at a rate up to 76.7%. In addition, as a result of the verification of model predictive power of the models showed an accuracy rate of 84.1%.
Identifying the Characteristics of Elderly Pedestrian using the Tobit Model
Choi, Sung-taek ; Choo, Sang-ho ; Jang, Jin-young ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 16~27
DOI : 10.12815/kits.2016.15.1.016
This study identified the factors which affect pedestrian behavior using the tobit model with a descriptive analysis. Individual characteristics, household characteristics, zone characteristics were selected as the independent variables. Walking frequency and walking time was adopted for the variables which represent walking behavior. The results showed that the walking time models were superior than the walking frequency models. The model for education purpose had the most lowest fitness and the model for others purpose had characteristics mixed up the various purposes. Futhermore, this research found that independent variables: individual, household and zone characteristic variables affected walking activities of elderly pedestrian by purpose. The walking activity decresed when a pedestrian grew older or had a vehicle or a driver's license. The Elderly facilities promoted the walking activity of seniors. As the floor area of neighborhood and business facilities was wide, the walking activities were animated. In addition, the compacted downtown developments decreased the elderly's walking activities, so it is needed to consider those results in terms of the urban planners.
Study on the B2X(Bicycle and Motorcycle-to-Everything) Safety Service in C-ITS
Kim, Jin-Tae ; Kim, Joo-Young ; Kim, Jun-Yong ; Bae, Hyun-Sik ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 28~38
DOI : 10.12815/kits.2016.15.1.028
Cooperative-Intelligent Transport Systems (c-ITS) has emphasized a real-time traffic safety service in urgent situations among highway infrastructure and four-wheeled vehicles, while two-wheeled vehicles, e.g. bicycles and motorcycle, sharing highway space and endangering highway safety, have yet been out of its interest. This paper delivers the results of a study conducted to analyze the patterns of two-wheeled-vehicle traffic accidents experienced in the past, the last three years (2011~2013), and to propose the types of service enhancing the safety of the riders of those. It was found from the analysis of historical accident data that the side collision on a link section should be taken care of for further safety treatment, while the old female drivers need additional care to decrease their fatality rate. By combining the services proposed for bicycles and motorcycles, this paper proposes (1) eight different bicycle-to-everything (B2X) services which can be eventually provided in c-ITS and (2) three of those that would be available in the near future with the current communication technologies.
Psychometric Analysis for Designing Elderly Customized Walking Assist Device
Kim, Junghwa ; Jang, Jeong-ah ; Choi, Keechoo ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 39~51
DOI : 10.12815/kits.2016.15.1.039
In accordance to rapid aging of population, the accidents of elderly pedestrian and pedestrian safety are becoming very important issues. In terms of smartphone technologies, older people are increasingly looking for useful and friendly ICT services that which can add a value on their silver life. This paper introduced a new IT-based service for elderly walking assist using a smart-phone accompanied by a wearable watch. We describe the functional requirements and a systems architecture model with an interface between a smart-phone and wearable watch. Moreover, this study attempted to verify what services are needed and to estimate elderly pedestrians' WTP (willingness to pay) for IT-based walking assistance device. A total of 189 elderly pedestrians were randomly surveyed through face-to-face interviews. The questionnaire consisted of 3 categories: (1) questions pertaining to socio-economic status, (2) 12 questions regarding walking attitudes, and (3) a question to measure WTP. With this gathered data, factor analysis and path model estimating were conducted. The results identified the elderly user requirements and the use-value of new innovative products for IT-based walking assistance services by two groups(latent elderly and elderly). The modeling result shows that elderly's service preference would increase the possibilities for the commercialization of IT-based walking device with improving their walking safety.
Improvement of Hi-Pass Users' Satisfaction Using Modified Importance Performance Analysis
Choi, Yoon-Hyuk ; Ko, Han-Geom ; Yun, Ilsoo ; Kim, Dong-In ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 52~65
DOI : 10.12815/kits.2016.15.1.052
The electronic toll collection system(ETCS), is globally used in about 40 countries. In Korea, the Korea Expressway Corporation led the nationwide introduction of the ETC system in 2007 under the brand name of the Hi-pass. Since then, Hi-pass, with its rate of average daily use reaching about 70%, has become an essential facility in Korean expressways. To identify users' perception on Hi-pass (satisfaction, preference, etc.), this study conducted a Modified Importance-Performance Analysis (M-IPA). With this, this study attempted to identify the kind of efforts necessary to enhance current Hi-pass users' convenience and satisfaction. According to the result of M-IPA, the items including "non-stop payment" and "toll discount" are identified as key items that require further improvement. For improvement in the "non-stop payment" item, operations of Hi-pass toll booths appropriate for the demand for Hi-pass use and the selection of Hi-pass booths' locations in consideration of entry and exit lanes need to be improved. In addition, with regard to the "toll discount" item, although toll discount is currently provided to Hi-pass users, thus, PR thereof will have to be strengthened. It is expected that this study will be used as basic data to devise methods of enhancing Hi-pass usage through improvement of Hi-pass users' satisfaction.
A Study on Measuring Vehicle Length Using Laser Rangefinder
Ryu, In-Hwan ; Kwon, Jang-Woo ; Lee, Sang-Min ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 66~76
DOI : 10.12815/kits.2016.15.1.066
Determination of type of a vehicle is being used in various areas such as collecting tolls, collecting statistical traffic data and traffic prognosis. Because most of the vehicle type classification systems depend on vehicle length indirectly or directly, highly reliable automatic vehicle length measurement system is crucial for them. This study makes use of a pencil beam laser rangemeter and devises a mechanical device which rotates the laser rangemeter. The implemented system measures the range between a point and the laser rangemeter then indicates it as a spherical coordinate. We obtain several silhouettes of cross section of the vehicle, the rate of change of the silhouettes, signs of the rates then squares the rates to apply cell averaging constant false alarm rate (CA-CFAR) technique to find out where the border is between the vehicle and the background. Using the border and trigonometry, we calculated the length of the vehicle and confirmed that the calculated vehicle length is about 94% of actual length.
Characteristic Analysis on Drivers' Glance Durations with Different Running Speeds on the Expressway
Sim, Hyeon-Jeong ; Do, Myung-sik ; Chong, Kyu-soo ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 77~86
DOI : 10.12815/kits.2016.15.1.077
Drivers can receive diverse types of traffic information through a number of methods. However, there are not enough information services considering human factors. In this study, as a basic research on human factors of the drivers, characteristic analysis on drivers' mean glance (fixation) durations with different running speeds on the expressway was performed under diverse running environments. To control variables other than running speeds, running environments were categorized into 4 types: 'daytime running without preceding vehicles', 'daytime running with preceding vehicles', 'nighttime running without preceding vehicles', and 'nighttime running with preceding vehicles'. Furthermore, ANOVA Test was used to divide speed groups. As a result of performing a multiple comparison to compare differences in glance behavior per each group, the road item and the preceding vehicles item showed an increase in mean glance durations as the speed increased, while the front view showed a decrease in mean glance durations. It was confirmed that the road sign showed no statistically significant difference in glance durations as the speed varied.
A study on the Electromagnetic Environment for the Navigation Device and Propulsion Device in Ship
Cho, Hyung-Rae ; Choi, Gi-Do ; Kim, Jong-Woo ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 87~94
DOI : 10.12815/kits.2016.15.1.087
Although studies and investments on electro-magnetic fields in terrestrial areas are being conducted, they are not applied to a ship. Especially ship is consist of Top Side, Bridge, and Engine Room. Top Side is mounted Antenna and radar. Bridge is mounted navigation and navigation equipment that have a safe voyage. Finally, Engine Room is mounted switchboard and this is used to ship propulsion system. Therefore the purpose of this paper is for suggesting optimized standard to apply to marine environment through analyzing electromagnetic wave environment in ship. For this, we were measured EMF in Hanbada ship in Korea Maritime and Ocean University and we compared and analyzed to measured values in Korea standards and international standards. Consequently, Engine Room of ship for the identified that there are limits to apply. The proposed results of this research will be expected to utilize for establishing standard a plan for EMF in ship.
A study on the Analysis of Radio Characteristics about Communication Mode in a Road
Choi, Gi-Do ; Lim, Ki-Taek ; Cho, Hyung-Rae ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 95~101
DOI : 10.12815/kits.2016.15.1.095
Vehicular communications is system which can be applied for transmission of various safety messages or Intelligent Transportation Systems(ITS) applications by combining vehicle/road technology with Information and Communication Technology(ICT). In recent years, a variety of ITS services are available such as driving information, road conditions, V2X messages as well as navigation and traffic jams notification. In general, vehicular communications can be used for vehicle-to-vehicle and vehicle-to-infrastructure communication by adopting IEEE802.11p/1609 standard which is commonly known as wireless access in vehicular environments. In this paper, WAVE communication standard based on the IEEE802.11p is explained and signal characteristics in WAVE communication is introduced. Also, The H/W and S/W characteristics in Road Side Station and On Board Equipment for the Vehicle to Everything communication are analyzed. Received Signal Strength which is power of receiving signal of communication equipment is measured in test road to estimate the real WAVE communication's performance. It is shown that the implemented WAVE communication technology is satisfactory to provide ITS services.
The Stabilization Loop Design for a Drone-Mounted Camera Gimbal System Using Intelligent-PID Controller
Byun, Gi-sig ; Cho, Hyung-rae ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 102~108
DOI : 10.12815/kits.2016.15.1.102
A flying drone generates vibrations in a great variety of frequencies, and it requires a gimbal system stabilization loop design in order to obtain clean and accurate image from the camera attached to the drone under this environment. The gimbal system for drone comprises the structure that supports the camera module and the stabilization loop which follows the precise angle while blocking the vibration from outside. This study developed a dynamic model for one axis for the stabilization loop design of a gimbal system for drones and applied classical PID controller and intelligent PID controller. The Stabilization loop design was developed by using MATLAB/Simulink and compared the performance of each controller through simulation. Especially, the intelligent PID controller can be designed almost without the dynamic model and it demonstrates that the angle can be followed without readjusting the parameters of the controller even when the characteristics of the model changes.
Fuzzy Domain Ontology-based Opinion Mining for Transportation Network Monitoring and City Features Map
Ali, Farman ; Kwak, Daehan ; Islam, SM Riazul ; Kim, Kye Hyun ; Kwak, Kyung Sup ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 15, issue 1, 2016, Pages 109~118
DOI : 10.12815/kits.2016.15.1.109
Traffic congestions are rapidly increasing in urban areas. In order to reduce these problems, it needs real-time data and intelligent techniques to quickly identify traffic activities with useful information. This paper proposes a Fuzzy Domain Ontology(FDO)-based opinion mining system to monitor the transportation network in real-time as well to make a city polarity map for travelers. The proposed system retrieves tweets and reviews related to transportation activities and a city. The feature opinions are extracted from these tweets and reviews and then used FDO to identify transportation and city features polarity. This FDO and intelligent prototype are developed using
OWL (Web Ontology Language) and JAVA, respectively. The experimental result shows satisfactory improvement in tweets and review's analyzing and opinion mining.