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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
Comparison Between Travel Demand Forecasting Results by Using OD and PA Travel Patterns for Future Land Developments
Kim, Ikki ; Park, Sang Jun ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 113~124
DOI : 10.7470/jkst.2015.33.2.113
The KOTI(Korea Transport Institute) released the new version of KTDB(Korea Transport DataBase) in public. The new KTDB is different from the past KTDB in using the concept of trip generation and trip attraction instead of using the concept of Origin-Destination (OD), which was used in the past KTDB. Thus, the appropriate analysis method for future travel demand became necessary for the new type of KTDB. The method should be based on the concept of PA(Production-Attraction). This study focused on analysis of trip generation and trip distribution related to newly generated trips by future land developments. The study also described clearly the standardized forecasting process and methods with PA travel tables. The study showed that the analysis results with OD-based analysis can be different from the results with PA-based analysis in forecasting travel demand for a simple example case even though they used exactly same orignal travel data. Therefore, this study emphasized that a proper method should be applied with the new PA-based KTDB. It is necessary to prepare and disseminate guidelines of the proper forecasting method and application with PA-based travel data for practician.
Perceived Features of Cycling and Value of Public Bike System
Kim, Junghwa ; Choi, Keechoo ; Kim, Suk Hee ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 125~135
DOI : 10.7470/jkst.2015.33.2.125
In this study our main focus is to verify the relationship between social value of transportation system and its perceived features. To achieve this objective, we investigated the value of public bike system (PBS) through willingness to pay (WTP) analysis using contingent valuation method (CVM) and the survey was conducted for 1726 respondents who live in Suwon, Korea. Moreover the determinants related to features related to bicycle use were also gathered. The estimated binary logistic regression and censored regression reveal that the value of PBS is influenced by perceived features towards bicycle use incorporating non-congestion, transportation mode like auto and bus, and high mobility system as well as other variables such as income, bicycle ownership etc. Furthermore the results show that the perceiving of positive features to bicycle use leads to higher social value of PBS. Based on the findings, we discuss the importance of pre-review for transport policy implementation, and also explore the possibilities for application to PBS.
Analysis on Pedestrian Crossing Illegal Behavior on Exclusive Median Bus Corridor: A Cace Study of Express Bus Terminal Station
Lee, Dong-Il ; Kim, Jin Tae ; Kim, Jun-Yong ; Bae, Hyun-Sik ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 136~144
DOI : 10.7470/jkst.2015.33.2.136
It has reported that a median bus-stop island on an exclusive median bus corridor has shortened a unit crossing distance, encouraged a pedestrian`s illegal jay walking, and thus increased the number of accidents in the area. Therefore, this study plans to analyze the various crossing patterns of pedestrians at exclusive median bus corridors. This study analyzes 30,184 pedestrian crossing data which are collected from the median bus-stops, `Express Bus Terminal,` and reveals that the rate of spatial jaywalking was 37.8%. This rate is 11.1 times higher than the rate of traffic signal violation. Therefore, this study suggests that more research needs to be done to provide a traffic safety facilities for protecting spatial crossing pedestrians and preventing jaywalking and traffic signal violation.
Demand Estimation Methodology for a New Air Route
Choi, Jong Haea ; Yoo, Kwang Yui ; Lee, Sang Yong ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 145~158
DOI : 10.7470/jkst.2015.33.2.145
A network connectivity has been regarded as a key element to strengthen a business competitive power in the aviation industry, so many airport authorities try to attract the new airlines and scheme out new air routes. With this trend, a study for an induced travel demand estimation methodology is needed. This study introduces a demand estimation method, especially for a new air route to a promising destination. With the results of previous studies, the derived demand is classified into four types - Local, Beyond, Behind and Bridge. The explanatory variables are established for each type of demand and the main independent variables are composed of distance, ratio of detour, and relative capacity compared with other airports. The equations using such variables and statistically significant coefficients are suggested as the model to make an estimation of derived demand for a new route. Therefore this study will be expected to take an initial step for all related parties to be involved more deeply into developing new air routes to enhance network connectivity.
A Study on the Speeding Intention and Behaviors Based on a Driver Behavior Questionnaire
Lee, Chang Hee ; Kum, Ki Jung ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 159~169
DOI : 10.7470/jkst.2015.33.2.159
Speeding has been the most common traffic violation which increases the risk of accidents. The purpose of this study is to examine drivers` behaviors on the speeding intention and speeding action and to identify the relationship between those causes and effects. Effects of behaviors and human characters of drivers on speeding are analyzed through a Driver Behavior Questionnaire and the cause and effect among behavior characters, speeding intention and speeding behavior are validated through the structural equation model. In order to validate the hypothesis of the study, a path analysis is conducted through structural equation model. As the result, Driver Behavior Questionnaire property that influences the speeding is revealed to be the violation while Driver Behavior Questionnaire properties that influences the speeding behavior are lapse, mistake, and violation. And the speeding intention influences the speeding behavior. The study results are compared with previous studies to reveal that Driver Behavior Questionnaire properties influencing the speeding behavior are in the order of violation, mistake and lapse. Three properties of Driver Behavior Questionnaire, lapse, mistake and violation, are behavior scales in agreement with previous studies. The results of this study based on a Driver Behavior Questionnaire are expected to be utilized as a way to predict and validate driving behaviors.
A Study on Passengers` Travel Characteristics at Bus Stops on Seoul Ring Expressway
Lee, Soongbong ; Baek, Seungkirl ; Kim, Jiyoon ; Choo, Sang Ho ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 170~181
DOI : 10.7470/jkst.2015.33.2.170
This study explores passengers` travel characteristics at six bus stops on the Seoul Ring Expressway using smart traffic card data. Based on the characteristics, political strategies to improve bus facilities on expressway are suggested. Firstly, among them two bus stops of Guri and Uiwang-Cheonggye have higher transfer rate of passengers, 37.56% and 36.9% of the total intercity (red) bus passengers on the expressway, respectively. Secondly, Uiwang-Cheonggye bus stop has the highest transfer rate, and Guri bus stop has also higher transfer rate and the highest on-and-off passengers. It implies that both bus stops need to be prioritized for improving bus stop facility, access roads, and connection facility between the bi-directional stops. Thirdly, Guri (down) bus stop has relatively longer waiting time for transfer, thus shorter bus headways running the bus stop should be considered. Lastly, most passengers using both stops come to and from Bundang-gu in Geongnam City. Overall, the results of this study would be helpful for transport planners to develop effective bus route policies and bus operation.
Comparison of Section Speed Enforcement Zone and Comparison Zone on Traffic Flow Characteristics under Free-flow Conditions in Expressways
Shim, Jisup ; Jang, Kitae ; Chung, Sung Bong ; Park, Shin Hyoung ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 182~191
DOI : 10.7470/jkst.2015.33.2.182
The Korean government introduced an automated speed enforcement system (ASES), which uses traffic enforcement cameras, to counteract safety issues that are caused by speeding. As the information of the traffic enforcement camera locations is provided to the drivers via navigation systems and mobile applications in a timely manner, drivers can avoid enforcement by momentarily diminishing their speeds only near the camera locations. To prevent drivers` evasional behavior and improve the effectiveness of ASES, section control, which enforces speeding vehicles by measuring their average travel speeds over a stretch of road and checking against the speed limit, has been recently implemented. In this study, Section Speed Enforcement Zone and Comparison Zone are compared in terms of traffic stream characteristics under free flow conditions. To this end, loop detector data were obtained from the three study sites and analyzed. The study results demonstrated that drivers maintain their speeds below the speed limit over the enforcement section with a lower variance of speeds.
An Analysis of the Effectiveness of Social Path Using the Space Syntax Technique
Choi, Sung Taek ; Lee, Hyang Sook ; Choo, Sang Ho ; Jang, Jin Young ; Kim, Su Jae ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 192~203
DOI : 10.7470/jkst.2015.33.2.192
Pedestrians not only walk along pedestrian pathways, but also choose unusual routes such as passing through buildings or crossing large scale open spaces. This study defines these unusual paths as social path, and includes them into one of the pedestrian road categories. Previous pedestrian accessibility and route choice studies could not evaluate correctly the space connectivity or optimal route because the social path was not considered properly. Therefore, this study analyzes the effectiveness of the social path in view of space connectivity focused on Coex and Seoul stations in Seoul, which are representative transit oriented development(TOD) areas. Global integration, which is widely used in network analysis, is selected (as performance index) to identify the space hierarchy and define new pedestrian links. The study results show that the network connectivity is improved especially in the main streets and social paths. This study demonstrated that the social path should be considered in finding the pedestrian optimal route from the practical perspective.
Improvement of Pedestrian Convenience and Mobility by Applying the Walking Guidance System in Subway Stations
Lee, Joo-Yong ; Kim, Taewan ; You, So-Young ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 204~213
DOI : 10.7470/jkst.2015.33.2.204
The congestion of pedestrians impedes the utilization efficiency of a subway station. Conflicts among pedestrians due to unseparated pedestrian flows not only increase the impedance of pedestrian mobility but also negatively affect on pedestrian safety. This paper analyzes the travel characteristics of bi-directional pedestrian flow based on microscopic movements, and evaluates the operation efficiency on separating the traffic line. The subway station was simulated in a 2-D grid structure by applying Discrete Element Method, and the movement is organized in each cell of the grid. As a result, the model explicates that separating the traffic line and encouraging the `Keep right rule` would be mostly effective for the conflicting flows. Therefore, applying the `Walking Guidance System` would be efficient to improve the pedestrian convenience and mobility.
Estimation of Annual Runway Capacity for Jeju International Airport Considering Aircraft Delays
Park, Jisuk ; Yun, Seokjae ; Lee, Youngjong ; Baik, Hojong ;
Journal of Korean Society of Transportation, volume 33, issue 2, 2015, Pages 214~222
DOI : 10.7470/jkst.2015.33.2.214
Jeju International Airport has become the most delayed airport in Korea, due to increased demand in air passengers and unexpected local weather condition. Observing the demands continuously grow for a decade, the airport is expected to be saturated in the near future. As a part of effort to prepare effective and timely measure for this expected situation, airport planners seeks the annual runway capacity, i.e., the appropriate number of flight operations in a given year with tolerable delay. In practice, the FAA formula is frequently adopted for the capacity estimation. The method, however, has intrinsic issues: 1) the hourly capacity imbedded in the formula is not clearly defined and thus the estimated value is vulnerable to be subjective judgement, and 2) the formula doesn`t consider aircraft delay resulted from runway congestion. In this paper, we explain a novel method for estimating the daily runway capacity and then converting to the annual capacity taking into account the aircraft delay. In this paper, average delay of aircraft was measured using microscopic air traffic simulation model. Daily capacity of the runways were analyzed based on the simulation outputs and the method to assess the yearly capacity is introduced. Using a microscopic simulation model named TAAM, we measure the average aircraft delay at various levels of flight demand, and then estimate the practical daily runway capacity. The estimated daily and annual runway capacities of Jeju airport are about 460 operations a day which is equal to 169,000 operations year. The paper discusses how to verify the simulation model, and also suggests potential enhancement of the method.