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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 13, Issue 6 - Dec 2014
Volume 13, Issue 5 - Oct 2014
Volume 13, Issue 4 - Aug 2014
Volume 13, Issue 3 - Jun 2014
Volume 13, Issue 2 - Apr 2014
Volume 13, Issue 1 - Feb 2014
Selecting the target year
Development of Integrated Transportation Analysis System for Large-scale event
Lim, Sung-Han ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 1~9
DOI : 10.12815/kits.2014.13.3.001
This study deals with development of Integrated Transportation Analysis System for Large-scale event. Based on case studies, the requirements of the system were defined and the direction of development was established. The large-scale events that require fast and accurate transportation policy were selected. The data warehouse and data mart were developed by integrating the large-scale event data and the traffic data. Business intelligence system was designed and developed users to allow timely decisions.
Methodology for Processing GPS-based Bicycle Speed Data for Monitoring Bicycle Traffic
Rim, Heesub ; Joo, Shinhye ; Oh, Cheol ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 10~24
DOI : 10.12815/kits.2014.13.3.010
Bicycle is a useful transportation mode that is healthy, emission-free, and environmentally compatible. Although large efforts have been made to promote the use of bicycling to date, there still exist various hurdles and limitations. One of the key issues to increase bicycling is how to gather bicycle-related data from the field and to generate valuable information for both users and operations agencies. This study proposes a method to process bicycle trajectory data which is obtained from tracing global positioning systems(GPS) equipped bicycle, which is defined as the probe bicycle. The proposed method is based on the concept of statistical quality control of data. In addition, a data collection and processing scenario in support of public bicycle system is presented. The outcomes of this study would be valuable fundamentals for developing bicycle traffic information systems that is a part of future intelligent transportation systems(ITS).
A Study on Active Priority Control Strategy for Traffic Signal Progression of Tram
Lee, In-Kyu ; Kim, Young-Chan ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 25~37
DOI : 10.12815/kits.2014.13.3.025
Recently, our local governments are conducting the introduction of tram system because it is recognized as an effective public transit that can solve a traffic jam in downtown, decreasing public transit share and environmental issues in world wide cities. We developed the Active Priority Control Strategy to efficiently operate a tram in our existing traffic signal system. This study organized the tram system for operating the Active Priority Signal Control, developed the algorithm that calculates a tram-stop dwell time in order to pass the downstream intersection without a stop. The dwell time is determined by arrival time at tram-stop, downstream signal time, and the location of a opposite tram, it can be reduced by choosing the optimal one among Signal Priority Controls. Using the VISSIM and VISVAP model, we conducted a simulation test for the city of Chang-won that it is expected to install a tram system. It showed that a developed signal control strategy is effective to prevent a tram's stop in intersections, to reduce a tram's travel time.
Performance Evaluation of Energy Efficient Packet Transmissions for Wi-Fi System
Shin, Taehyu ; Kim, Jongwoo ; Park, Suwon ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 38~46
DOI : 10.12815/kits.2014.13.3.038
Wi-Fi STAs in power saving mode described in the Wi-Fi specification can deteriorate the system performance such as throughput, time delay when they receive data frames from a Wi-Fi AP. This problem is caused by data frame reception failure due to the channel state, and it increases re-transmissions. In this paper, we propose a modified power saving mode of Wi-Fi system in order to solve the problem. Also, we evaluate its performance in terms of throughput and time delay by simulation.
Developing a Structural Equation Model of Drivers' Preference on Route Diagrams of Variable Message Sign
Kwon, Hye Ri ; Kim, Byung Jong ; Kim, Won Kyu ; Yu, Su In ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 47~65
DOI : 10.12815/kits.2014.13.3.047
VMS(Variable Message Sign) helps drivers to choose their path to destinations on roadways. Some types of VMS often provide traffic information with clearly visible and comprehensible graphical route diagrams. Currently many diagramed types of VMS are installed on urban arterial and highways. This type of VMS surely enhances drivers' ability to comprehend traffic route information while they are driving on the roadway. Nevertheless, some of them are presented with so much information and design elements and they sometimes lead to decline of drivers' comprehensible level for traffic information. Drivers would fail to decide their preferable route in this state of information overflow. The purpose of this paper is to develop a drivers preference model for effective design principle including size and height of displaying font, and the amount of information in the route diagram considering driving speed, sex and age of the driver. This model is developed using structural equation modeling techniques. This model considers driver's emotional factor and, human factor and design component of route diagram. To collect data, we built driving simulator which is able to replicate real driving condition. 72 people who participated in the simulation were selected considering gender and age. The developed model showed that the amount of information, and visibility are more influential factors to the drivers' preference of the route diagram on VMS than design elements such as the shape and the font of the diagram.
A study on the imputation solution for missing speed data on UTIS by using adaptive k-NN algorithm
Kim, Eun-Jeong ; Bae, Gwang-Soo ; Ahn, Gye-Hyeong ; Ki, Yong-Kul ; Ahn, Yong-Ju ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 66~77
DOI : 10.12815/kits.2014.13.3.066
UTIS(Urban Traffic Information System) directly collects link travel time in urban area by using probe vehicles. Therefore it can estimate more accurate link travel speed compared to other traffic detection systems. However, UTIS includes some missing data caused by the lack of probe vehicles and RSEs on road network, system failures, and other factors. In this study, we suggest a new model, based on k-NN algorithm, for imputing missing data to provide more accurate travel time information. New imputation model is an adaptive k-NN which can flexibly adjust the number of nearest neighbors(NN) depending on the distribution of candidate objects. The evaluation result indicates that the new model successfully imputed missing speed data and significantly reduced the imputation error as compared with other models(ARIMA and etc). We have a plan to use the new imputation model improving traffic information service by applying UTIS Central Traffic Information Center.
An Estimation of Link Travel Time by Using BMS Data
Jeon, Ok-Hee ; Ahn, Gye-Hyeong ; Hyun, Cheol-Seung ; Hong, Kyung-Sik ; Kim, Hyun-Ju ; Lee, Choul-Ki ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 78~88
DOI : 10.12815/kits.2014.13.3.078
Now, UTIS collects and provides traffic information by building RSE 1,150(unit) and OBE about 51,000(vehicle). it's inevitable to enlarge traffic information sources which use to improve quality of UTIS traffic information for Stabilizing UTIS's service. but there are missing data sections. And, In this study as a way to overcome these problems, based on BIS(Bus information system) installed and operating in the capital area to develop normal vehicle's link transit time estimation model which is used realtime collecting BMS data, we'll utilize the model to provide missing data section's information. For these problem, we selected partial section of suwon-city, anyang-city followed by drive only way or not and conducted model estimating and verification each of BMS data and UTIS traffic information. Consequently, Case2,4,6,8 presented highly credibility between UTIS communication data and estimated value but In the Case 3,5 we determined to replace communication data of UTIS' missing data section too hard for large error. So we need to apply high credibility model formula adjusting road managing condition and the situation of object section.
The Visualization Evaluation of Traffic Apps using Heuristics Techniques
Cho, Hyun-Ji ; Nam, Doohee ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 89~95
DOI : 10.12815/kits.2014.13.3.089
Traffic information is closely related to our daily lives. Thanks to the development of portable electronic devices, we can get traffic information rather easily. In particular, Most of traffic informations are being provided through mobile apps due to the spread of smartphones. Accordingly, to improve usability is emerged significant challenge. Therefore, this paper perform comparative evaluation for four traffic mobile apps which is currently being offered in our country and draw user needs. Then we suggest direction of traffic information apps for the future. First, We summarized research trend on information visualization and techniques which is used to traffic mobile apps with introduction traffic mobile apps. We adopted heuristic evaluation technique which is suitable for evaluating visualization and drew evaluation elements for traffic information visualization. Then, We conducted a survey based on evaluation elements so we was able to give objectivity to evaluation of information visualization which was could subjective. Based on the results we could derive results of evaluation of visualization for four traffic mobile apps. We expect that the results of this study will be contributed to develop of traffic information visualization services.
Analysis on Factors of Traffic Accident on Roads having Width of Less than 9 Meters
Lim, You-Jin ; Moon, Hak-Ryong ; Kang, Won-Pyoung ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 96~106
DOI : 10.12815/kits.2014.13.3.096
Necessarily traffic policies have been biased in car than pedestrian, so pedestrian's environment is getting worse. Result of this situation our accident rate is high as 36.4%, compared to OECD member countries with average rate of 17.8%(in 2009). Increasing interest for pedestrians environment improvement, and it make an effort to build environment to guarantee walk and safety of pedestrians. Analysis on the binary logistic regression(BLR) was used. The dependent variable is occurring from the road width of less than 9m accident, and independent variable extracted can be obtained from the traffic accident data. Traffic accident on roads having width of less than 9 meters affecting variables is when the driver is straight, when the driver is female, when the pedestrian is walk driveway, and so on. To prevent it, efforts is demanded to protect handicapped, to build safe pedestrians environment using C-ITS and to decrease speed of going straight vehicle on roads having width of less than 9 meters.
A Correlation Model of Traffic Safety and Personality in Elderly and Non-Elderly People
Kim, Wonchul ;
The Journal of The Korea Institute of Intelligent Transport Systems, volume 13, issue 3, 2014, Pages 107~114
DOI : 10.12815/kits.2014.13.3.107
The purpose of this study is to explore a correlation model of traffic safety and personality in elderly and non-elderly people. The correlation model is constructed by a factor regression analysis with latent factors and items related to traffic safety consciousness. As a result, it is found that non-elderly people with positive, active, perfectionistic, and unforgiving personality are likely to speed, have a high chance to be involved in traffic accidents, and tend to give low scores to traffic conditions. However, elderly people who are highly educated are likely to give high scores to traffic conditions and do not speed. Instead, elderly people become more likely to be involved in traffic accidents when they are engaged in more social activities. The results could contribute to developing traffic safety education and policy that is better customized to the specific needs of different groups of road users.