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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 33, Issue 6 - Dec 2015
Volume 33, Issue 5 - Oct 2015
Volume 33, Issue 4 - Aug 2015
Volume 33, Issue 3 - Jun 2015
Volume 33, Issue 2 - Apr 2015
Volume 33, Issue 1 - Feb 2015
Selecting the target year
The Study of Reflecting Regional Characteristics in Car Insurance for Reduction of Traffic Accidents
KIM, Dong Kuk ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 223~236
DOI : 10.7470/jkst.2015.33.3.223
This study dealt with regional characteristics in car insurance for reduction of traffic accidents. The objective was to establish scientifically the verification procedure in the application of regional auto insurance rate. To specify the objective, this study conducts the correlation analysis between factors which are various in each local traffic environment and the loss ratio in automobile insurance. Also, this provides a correlation and a modal in loss ratio, classifying human factors in locality in major cause result from traffic accident. Based on the results, this brings up the problems with applying a uniform criterion for automobile insurance rate although various factors have effect on traffic accidents in locality. Therefore, what stands out most from this study is that a policy on automobile insurance applied to regional factor should be introduced.
Calculation of Basic Unit of Carbon Emissions in Operation and Maintenance Stage of Road Infrastructure
KWAK, In Ho ; KIM, Kun Ho ; WIE, Dae Hyung ; PARK, Kwang Ho ; HWANG, Young Woo ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 237~246
DOI : 10.7470/jkst.2015.33.3.237
Operation and Maintenance in road infrastructure is repetitive carbon emissions activities to preserve the road in its originally constructed condition. In the view of road planning and construction, operation, and maintenance of life cycle, operation and maintenance stage quantification of carbon emissions is very important because it is easily accessible activities to reduce carbon emissions in road infrastructure that existing and new road. However, carbon emissions estimation in operation and maintenance stage is yet to do, because data collection is so hard and carbon emissions estimation methodology is very complicated. In this study, a basic unit of carbon emission in the operation and maintenance stage of the road infrastructure was developed in order to get the quantitative determination of carbon that occurring. Carbon emissions of the Expressway and Common state road was calculated by using the basic unit of carbon emission and application plan of basic unit of carbon emission are presented.
Development of Revenue Change Index by New Highway Opening Under the Unified Revenue System
JEON, Gyoseok ; CHUNG, Woohyun ; CHOI, Keechoo ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 247~255
DOI : 10.7470/jkst.2015.33.3.247
When the new highway is opened, the new highway has alternative or linkage relationship with current highway networks. This change will lead to the different traffic patterns which can also lead to the change of toll revenue in other surrounding highways. This study investigates the change of revenue on the current highway networks caused by the new highway opening under the unified revenue system. Moreover, this study calculates the effectiveness of the revenue fluctuation when the highway system is under controlled by the public or private institution and proposes the meaning of the revenue fluctuation to those institutions. This study also proposes an index of revenue change that could be used to reflect the individual project evaluation and set the priority between multiple projects. Some limitations and future research agenda have also been discussed.
Development of a Mid-/Long-term Prediction Algorithm for Traffic Speed Under Foggy Weather Conditions
JEONG, Eunbi ; OH, Cheol ; KIM, Youngho ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 256~267
DOI : 10.7470/jkst.2015.33.3.256
The intelligent transportation systems allow us to have valuable opportunities for collecting wide-area coverage traffic data. The significant efforts have been made in many countries to provide the reliable traffic conditions information such as travel time. This study analyzes the impacts of the fog weather conditions on the traffic stream. Also, a strategy for predicting the long-term traffic speeds is developed under foggy weather conditions. The results show that the average of speed reductions are 2.92kph and 5.36kph under the slight and heavy fog respectively. The best prediction performance is achieved when the previous 45 pattern cases data is used, and the 14.11% of mean absolute percentage error(MAPE) is obtained. The outcomes of this study support the development of more reliable traffic information for providing advanced traffic information service.
Relationships Between Urban Infrastructure and Travel by the Elderly: Based on the Public Transit Trip Attraction Model for Dong
LEE, Soong-bong ; JUNG, Dongjae ; CHANG, Justin S. ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 268~275
DOI : 10.7470/jkst.2015.33.3.268
As Korea is predicted to be a super-aged society in the near future, transport policies that internalize the elderly have also drawn attentions. Even though some studies have examined the travel by the elderly with various motives, it is, however, difficult to find references that deal with the unique spatio-temporal characteristics of senior trips. For example, the models by time period have represented the temporal property while a set of independent variables associated with urban infrastructure have addressed the spatial feature. This study was conducted under a trip attraction model for transit. The result shows that transit facilities, commercial areas, and hospitals are the dominant factors to explain the travel by the elderly, particularly during 09:00-17:00.
A Study on the Road Facilities Use Characteristics of the Transportation Vulnerable by AHP Analysis
KIM, Min Je ; LEE, Young Woo ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 276~283
DOI : 10.7470/jkst.2015.33.3.276
Pedestrians have been exposed to dangerous traffic environments, in which walking spaces in a city decrease without improved facilities even though cars increase. Such poor walking environments are deadly dangerous to the vulnerable as well as the non-vulnerable. This study analyzed the road facilities use characteristics according to a type of vulnerability in order to improve traffic safety and walking environment for vulnerable pedestrians. This study surveyed the vulnerable in terms of issues that they encountered on existing walkways and conducted the analytic hierarchy process (AHP), which took all quantitative and qualitative variables into account. The results of Level-3 analysis were showed that the elderly and the disabled were partially similar; both felt most inconvenient at enter-exit sections, steep walkway and bad paved walkway. Unlike those results, people with children and/or infants answered that overpass or underpass walkways without lifting facilities were most inconvenient walking environments.
The Method of Wet Road Surface Condition Detection With Image Processing at Night
KIM, Youngmin ; BAIK, Namcheol ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 284~293
DOI : 10.7470/jkst.2015.33.3.284
The objective of this paper is to determine the conditions of road surface by utilizing the images collected from closed-circuit television (CCTV) cameras installed on roadside. First, a technique was examined to detect wet surfaces at nighttime. From the literature reviews, it was revealed that image processing using polarization is one of the preferred options. However, it is hard to use the polarization characteristics of road surface images at nighttime because of irregular or no light situations. In this study, we proposes a new discriminant for detecting wet and dry road surfaces using CCTV image data at night. To detect the road surface conditions with night vision, we applied the wavelet packet transform for analyzing road surface textures. Additionally, to apply the luminance feature of night CCTV images, we set the intensity histogram based on HSI(Hue Saturation Intensity) color model. With a set of 200 images taken from the field, we constructed a detection criteria hyperplane with SVM (Support Vector Machine). We conducted field tests to verify the detection ability of the wet road surfaces and obtained reliable results. The outcome of this study is also expected to be used for monitoring road surfaces to improve safety.
Developing a Method for Estimating Urban Environmental Impact Using an Integrated Land Use-Transport Model
HU, Hyejung ; YANG, Choongheon ; YOON, Chunjoo ; KIM, Insu ; SUNG, Junggon ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 294~303
DOI : 10.7470/jkst.2015.33.3.294
This paper describes a method that can be used for estimating future carbon emissions and environmental effects. To forecast future land use and transportation changes under various low carbon policies, a DELTA and OmniTRANS combination (a land use-transport integrated model) was applied. Appropriate emission estimation methods and dispersion models were selected and applied in the method. It was designed that the estimated emissions from land use and transportation activity as well as the estimated concentrations of air pollutants and comprehensive air quality index (CAI) are presented on a GIS-based map. The prototype was developed for the city of Suwon and the outcome examples were presented in this paper; it demonstrates what kinds of analysis results are presented in this method. It is expected that the developed method will be very useful for decision makers who want to know the effect of environmental policies in cities.
A Method to Evaluate Distance Efficiency of Seoul Metropolitan Subway by Estimating Subway Detour Factor
LEE, Jae Min ; KIM, Nam Seok ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 304~314
DOI : 10.7470/jkst.2015.33.3.304
Detour of metro (subway) in metropolitan area has been regarded as one of inherent elements that make entire metro system less competitive than passenger cars. However, factors affecting detour of metro line is not specified clearly when a new subway system is planned or an existing system is improved. Previous detour-related studies was reviewed for developing 'distance efficeincy evaluation model' for metro as well as its counterpart (i.e. road). Metro line 3 (orange line) of Seoul metropolitan area was applied as a case study. As a results, the most detoured OD segment is Daechi - Apgujeong and its detour factor is 1.93 which means that the distance of the metro is 1.93 times longer distance compared to the distance of the road. The metro line 3 has averagely 20% longer distance compared to road for the identical O/D pairs.
A City Path Travel Time Estimation Method Using ATMS Travel Time and Pattern Data
KIM, Sang Bum ; KIM, Chil Hyun ; YOO, Byung Young ; KWON, Yong Seok ;
Journal of Korean Society of Transportation, volume 33, issue 3, 2015, Pages 315~321
DOI : 10.7470/jkst.2015.33.3.315
ATMS calculates section travel time using two-way communication system called DSRC(Dedicated Short Range Communications) which collects data of RSE (Road Side Equipment) and Hi-pass OBU (On-board Unit). Travel time estimation in urban area involves uncertainty due to the interrupted flow. This study not only analyzed real-time data but also considered pattern data. Baek-Je-Ro street in Jeon-Ju city was selected as a test site. Existing algorithm was utilized for data filtering and pattern data building. Analysis results repoted that travel time estimation with 20% of real-time data and 80% of pattern data mixture gave minimum average difference of 37.5 seconds compare to the real travel time at the 5% significant level. Results of this study recommend usage of intermixture between real time data and pattern data to minimize error for travel time estimation in urban area.