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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Society of Transportation
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Journal DOI :
Korean Society of Transportation
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Volume & Issues
Volume 32, Issue 6 - Dec 2014
Volume 32, Issue 5 - Oct 2014
Volume 32, Issue 4 - Aug 2014
Volume 32, Issue 3 - Jun 2014
Volume 32, Issue 2 - Apr 2014
Volume 32, Issue 1 - Feb 2014
Selecting the target year
Economic Effects Analysis for Passenger Car's Idle Stop and Go Strategy: Focusing on Seoul Metropolitan Area
Lee, Kyu Jin ; Jang, Jeong Ah ; Choi, Keechoo ; Shim, Sang Woo ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 421~430
DOI : 10.7470/jkst.2014.32.5.421
The greenhouse gas emission generated by idling vehicles is a critical issue in the greenhouse gas reduction from the transportation sector. Recently, the mandatory application of the Idle Stop and Go (ISG) for buses, trucks and taxis is in the process of legislation. Focusing on the regulation is about to apply to passenger cars, this study analyzed the quantitative economic effects of the ISG installation by passenger car types in Seoul metropolitan area to support proper policy making. The benefit cost ratio of ISG installation on commercial passenger car of Seoul is the most effective, calculated as 8.55. Accordingly, the amount of 660 liters (per year per vehicle) of fuel and 1,606 kg (per year per vehicle) of
could be reduced. The results of this study might be used as an index for judgment of policy such as determining appropriate subsidy for ISG installation on passenger cars.
A Study on Aviation Safety Plan and Safety Performance Indicator of the Domestic and International Case Studies
Lee, Ji Seon ; Lee, Dong Houn ; Yoon, Yoon Jin ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 431~440
DOI : 10.7470/jkst.2014.32.5.431
According to the State Safety Program (SSP) of the International Civil Aviation Organization (ICAO), it is essential to establish and manage Safety Performance Indicators (SPIs) which are used for monitoring the safety performance to achieve the national aviation safety goal. There have been enormous efforts to develop the framework of SPIs by considering the current status for each country. In case of Republic of Korea, however, there has been limited research and policy projects related to the framework for SPIs. Furthermore, Korea has used identical SPIs since the SSP was legislated in 2008. With this background, this research is, as part of strategy for the state level of SPI development, the study cases of advanced aviation countries for SPI development plans, such as the European Aviation Safety Agency (EASA) of the EU, the Civil Aviation Authority (CAA) of the UK, the Finish Transport Safety Agency (FTSA) of the Finland and the Federal Aviation Administration (FAA) of the U.S. The comparison between the foreign and domestic policies for SPI development strategies are provided in the conclusion of this study. The results and analyses of the case studies performed in this research will be helpful to provide some valuable development strategies for further SPI research in Korea.
Development of an Evaluation Index for Identifying Freeway Traffic Safety Based on Integrating RWIS and VDS Data
Park, Hyunjin ; Joo, Shinhye ; Oh, Cheol ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 441~451
DOI : 10.7470/jkst.2014.32.5.441
This study proposes a novel performance measure, which is referred to as Hazardous Spacing Index (HSI), to be used for evaluating safety of traffic stream on freeways. The basic principle of the proposed methodology is to investigate whether drivers would have sufficient stopping sight distance (SSD) under limited visibility conditions to eliminate rear-end crash potentials at every time step. Both Road Weather Information Systems (RWIS) and Vehicle Detection Systems (VDS) data were used to derive visibility distance (VD) and SSD, respectively. Moreover, the K-Nearest Neighbors (KNN) method was adopted to predict both VD and SSD in estimating predictive HSIs, which would be used to trigger advanced warning information to encourage safer driving. The outcome of this study is also expected to be used for monitoring freeway traffic stream in terms of safety.
A Study on Development and Utilization of Automatic Parking Survey System
Lee, Young Woo ; Kwon, Hyuck Jun ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 452~461
DOI : 10.7470/jkst.2014.32.5.452
Conventional parking survey has been usually performed by a person, which has a lot of problems such as decreased mobility, data input error, longer time and expensiveness. Therefore, this study attempted to develop an automatic parking survey method using lately commercialized equipments that were highly efficient imagery interpretation equipments, GPS, and infrared lighting fixtures. In addition, this study developed a parking analysis software that enables to modify and save data, and analyze survey data by the automatic parking survey method. When parking survey is conducted using automatic parking survey method, surveying accuracy is influenced by the running speed of a surveying vehicle, the photographing angle of an imagery interpretation equipment, the gap between parking vehicles and the distance of a surveying vehicle to parking vehicles. Therefore, this study drew optimum conditions by testing on each items for accuracy improvement, and developed a parking analysis software for systematic storage and management of parking survey data, supporting the parking analysis and output the parking analysis result.
A Study on Sentiment Evaluation and Satisfaction of the Vertical Rope-type Platform Safety Door(RPSD)
Park, Jungsik ; Jung, Byungdoo ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 462~472
DOI : 10.7470/jkst.2014.32.5.462
As the Rope Type Platform Safety Door (RPSD) is now commercially available, the technology of RSPD and the public sentiment towards RPSD are being scrutinized. During the period of RPSD development and trial installation, there has been a need to examine its technical reliability and safety, and its users' emotional attitudes. Though often dichotomized in practice, technological innovation of, and the public sentiment towards RPSD are directly related to continuing and collaborated efforts to enhance public satisfaction with the service. Therefore, based on the analyses of public sentiment towards the RPSD system and the log files of operation, this study evaluates public satisfaction with RPSD during its trial phase at Munyang Station in the Daegu Subway System.
Necessity of Climbing Lane on SMART Highway and its Design Guidelines
Kim, Sang Gu ; Kim, Young Chun ; Sim, Dae Young ; Lee, Yong Mun ; Kim, Jong Won ; Kim, Heung Rae ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 473~486
DOI : 10.7470/jkst.2014.32.5.473
This study aims to review whether climbing lane installment is needed by analyzing the impact that standard trucks have on traffic according to vertical alignment at SMART highway, and if climbing lanes are required to propose truck speed change curves based on slope length. We used VISSIM simulation model to obtain the speed change of the standard truck on uphill roads. The standard truck on climbing lanes was set for 100kg/kW (170lb/hp) with the entry speeds set and analyzed by 90, 100, and 110 km/h considering the future speed limit of trucks. The results of the research show that under SMART highway circumstance, the 1 and 2% vertical alignment is not needed at the climbing lane but 3% vertical alignment is necessary. In order to install the climbing lane at 3% vertical alignment, the speed change curve of truck depending on slope length of 90, 100, and 110km/h of entry speed is proposed.
Importance Factor Analysis on Transfer Facilities by Considering Characteristics of Urban Railway Station
Kim, Hwang Bae ; Ahn, Woo-Young ; Lee, Sang Hwa ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 487~496
DOI : 10.7470/jkst.2014.32.5.487
Much research has been actively done so far on the inconvenience of each urban railway station; however, Research is on importance factor analysis on transfer facilities by considering characteristics of railway stations is relatively insufficient. In this study, a novel method of finding causality between transfer facilities(movement, information, comfortability, etc,) in terms of demands and platform types is provided by using SEM(Structural Equation Model). The results of SEM analysis show that a large demand transfer station if combined with island and segregate platform types, has a higher importance factor with respect to information facility, movement facility position and comfortability. In addition, a medium demand transfer station if combined with separate and separate platform types has a higher importance factor with respect to information facility, movement facility and comfortability.
Aerodrome Air Traffic Control Simulator of Promotion for Advanced Ground Safety
Lee, In Young ; Choi, Youn Chul ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 497~502
DOI : 10.7470/jkst.2014.32.5.497
As ground air traffic control at the airport is one of the most important tasks in air transport, attention to the development of a related simulator has expanded all around the world. For this reason, this research describes the characteristics and advantages of this advanced aerodrome traffic control simulator, developed in South Korea, as well as its linkage with A-SMGCS, which is planned to be developed in the future. One of the characteristics of this simulator is that it is possible to train an air traffic controller independently, especially under various conditions such as in different weathers and normal or abnormal circumstances. Therefore, this aerodrome traffic control simulator, through the comprehensive training under various conditions, will contribute to aviation safety and airport capacity enhancement training.
Coasting and Post-impact Motion of a Vehicle With Tire Blowout
Han, Inhwan ; Lim, Sanghyun ; Park, Jong-Chan ; Choi, Jihun ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 503~512
DOI : 10.7470/jkst.2014.32.5.503
In this paper, various tire blow-out force experiment data were collected and analyzed to obtain approximate values of related coefficients such as rolling resistance, self-aligning torque, cornering stiffness, and radial stiffness for the analysis of the motion of vehicles with tire blow-outs. These coefficients related to tire blow-outs were input into a vehicle accident analysis program to simulate and examine the effects of tire blow-outs. Various configurations and velocities of vehicle collisions without tire blow-outs were also used as reference to establish collision events of vehicle collisions with tire blow-outs. For the events, the simulation analysis was performed and collision characteristics were obtained. Consideration of tire blow-outs or damages suggested in this study will greatly contribute to more reliable vehicle accident reconstructions.
Development and Achievement of Head-Up Display in Public Transit for Reducing Accidents
Roh, Chang-Gyun ; Park, Bum Jin ; Kang, Weon-Eui ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 513~521
DOI : 10.7470/jkst.2014.32.5.513
Korea's traffic congestion costs including other social costs due to accidents, environmental pollution and increased demand is increasing every year. In this regard, direction of government policy was geared toward suppression of vehicle demand and activation of public transportation, which is determined to be the best solution with limited supply of infrastructure such as road facilities. This study aims to implement public transport bus-only Head-Up Display (hereafter called HUD) technology which displays public transport information required for a bus driver on the front glass of a bus. The public transport bus-only HUD not only prevents gaze dispersion of bus drivers but also helps to reduce the heavy workload of bus drivers by providing information required for driving. Ultimately, the final research purpose is a reduction of bus traffic accidents by 50% caused by negligence in keeping eyes forward or sideways.
An Automatic Pattern Recognition Algorithm for Identifying the Spatio-temporal Congestion Evolution Patterns in Freeway Historic Data
Park, Eun Mi ; Oh, Hyun Sun ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 522~530
DOI : 10.7470/jkst.2014.32.5.522
Spatio-temporal congestion evolution pattern can be reproduced using the VDS(Vehicle Detection System) historic speed dataset in the TMC(Traffic Management Center)s. Such dataset provides a pool of spatio-temporally experienced traffic conditions. Traffic flow pattern is known as spatio-temporally recurred, and even non-recurrent congestion caused by incidents has patterns according to the incident conditions. These imply that the information should be useful for traffic prediction and traffic management. Traffic flow predictions are generally performed using black-box approaches such as neural network, genetic algorithm, and etc. Black-box approaches are not designed to provide an explanation of their modeling and reasoning process and not to estimate the benefits and the risks of the implementation of such a solution. TMCs are reluctant to employ the black-box approaches even though there are numerous valuable articles. This research proposes a more readily understandable and intuitively appealing data-driven approach and developes an algorithm for identifying congestion patterns for recurrent and non-recurrent congestion management and information provision.
A Study on Data Preprocessing for the Activity-Travel Simulator: A Case of FEATHERS Seoul
Cho, Sungjin ; Hwang, Jeong Hwan ; Bellemans, Tom ; Kochan, Bruno ; Lee, Won Do ; Choi, Keechoo ; Joh, Chang-Hyeon ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 531~543
DOI : 10.7470/jkst.2014.32.5.531
Research on activity-based travel demand forecasting and activity-travel simulator has received an international attention for the last two decades. Ways to develop the activity-based simulator may be manifold. It is obvious that importing an existing simulator that has been proven internationally likely reduces the development cost and the risk of failure. By definition of the activity-based approach, however, the details of an activity-based simulator inevitably relies on particular social, economic and cultural characteristics of the society where the simulator is developed. When importing such a simulator from overseas, the researcher should be aware of the importance of tuning the system for the society to which the imported system is applied. There are many potential works on this, including for example the tuning of data structure that is likely different form of the original system. The authors are yet aware of certain research on those. The current paper aims to report the result of transforming the input data for applying the existing activity-travel simulator to Seoul. The paper first introduces FEATHERS that was developed in Belgium having Albatross which is the core of system. FEATHERS Seoul that is under development and modified version of the original FEATHERS is briefly described and the related problems are discussed. The paper then explored to resolve and to alleviate such problems.
A Study on Activity Type Based on Multi-dimensional Characteristics
Na, Sung Yong ; Lee, Seungjae ; Kim, Joo Young ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 544~553
DOI : 10.7470/jkst.2014.32.5.544
Activity-based models analyze individuals' various daily activities that are identified as a decision-making unit for transportation planning. In other words, it is the model that determines the types of activities according to the social, economic and situational characteristics of the groups with the same activity patterns and predicts individuals' activity time, distance, spatial movement and transportation mode. The activity-based model is a method of estimating more efficient and realistic demand in transportation forecasting because traffic is regarded as a complex decision-making process that an individual and other people participate in. In this paper, we grasp the factors affecting choice behavior of activity pattern and analyze choice behavior of activity pattern based on multi-dimensional characteristic of each person. First, we classify activity types of reviewing the trip chain and activity purpose. Next, we identified preferable activity types using complicated characteristics of main agent of activity. We concluded that choice behavior of activity pattern is dependent on complex characteristics of each agent, and further multi-dimensional characteristics of each person are affected over the whole decision process of activity schedule.
A Study of Driver's Response to Variable Message Sign Using Evolutionary Game Theory
Kim, Joo Young ; Na, Sung Yong ; Lee, Seungjae ; Kim, Youngho ;
Journal of Korean Society of Transportation, volume 32, issue 5, 2014, Pages 554~566
DOI : 10.7470/jkst.2014.32.5.554
An objective of VMS(Variable Message Signs) is to make transportation system effective specifically for driver's path selection. The traffic solutions including a VMS problem can be modeled through Game Theory, however, the majority of the studies can not model various driver's response according to VMS information in game theory. So, this paper tries to analyze a driver's response according to VMS traffic informations through evolutionary game theory. We apply a behavior characteristics of driver to evolutionary game theory, then finds drivers are only accepting in case of the biggest pay-off, and if a traffic flow finds a balance over time, ratio of accepting information is converged as an evolutionary stable state gradually. Consequently, the strategy of the other drivers such as traffic problems can not be predicted accurately. In case, drivers repeat between groups and reasonable judgment by the experience, we expect that VMS can provide strategic information through evolutionary game theory.