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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 30, Issue 6 - Dec 2012
Volume 30, Issue 5 - Oct 2012
Volume 30, Issue 4 - Aug 2012
Volume 30, Issue 3 - Jun 2012
Volume 30, Issue 2 - Apr 2012
Volume 30, Issue 1 - Feb 2012
Selecting the target year
A Study on Estimating the Benefits by Pedestrian Environment Improvement Using CVM
Kim, Jang-Wook ; Kang, Soon-Yang ; Kim, Kyung-Tae ; Kang, Young-Kyun ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 7~19
DOI : 10.7470/jkst.2012.30.4.007
In this study of estimating the benefits of environmental materials, the CVM method used in environmental economics was applied to estimate the value of pedestrian environment improvement. After finding the Willingness To Pay (WTP) level of residents through CVM, this study attempts to calculate quantitative benefits from the pedestrian environment improvement. In this study, a survey targeting the inhabitants in Seongbuk-gu adjacent to a business area was carried out for pedestrian environment improvement considering form of payment, willingness to pay and such by establishing and showing several virtual scenarios depicting a quiet and comfortable pedestrian environment. As a result, the willingness to pay level of the Seongbuk-gu residents was 627 won of surcharge for pedestrian environment improvement per month. Additionally, the annual total benefits by pedestrian environment improvement was estimated within a range from 1,247,516,820 won to 286,305,110 won.
A Study on the Safety-Maximizing Design of Exclusive Bus Lanes
Yang, Chul-Su ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 21~32
DOI : 10.7470/jkst.2012.30.4.021
Exclusive bus lane (EBL) is typically located in the roadway median, and is accessed by weaving across the GPLs(general purpose lanes) before entering from the left lane of the GPLs. To maximize the potential for successful EBL operations, a critical design issue that requires special attention is the length of bus weaving section before entering EBL. The process of developing guidelines for the length of bus weaving section can be supported by a sensitivity analysis of performance measure (safety) with respect to the bus weaving distance. However, field data are difficult to obtain due to inherent complexity in creating performance measure (safety) samples under various interesting flows and bus weaving distance that are keys to research success. In this paper, VISSIM simulation is applied to simulate the operation of roadway weaving areas with EBL, and based on vehicle trajectory data from microscopic traffic simulation models, the Surrogate Safety Assessment Model (SSAM) computes the number of surrogate conflicts (or degree of safety) with respect to the bus weaving distance. Then, a multiple linear regression (MLR) model using safety data (number of surrogate conflicts) is developed. Finally, guidelines for bus weaving distance are established based on the developed MLR. Developed guidelines explicitly indicate that a longer bus weaving distance is required to maintain desired safety as weaving volume increases.
Analysing Relationships between Transportation and Communications Industries Based on Input-Output Table
Chang, Yu-Kyoung ; Choo, Sang-Ho ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 33~42
DOI : 10.7470/jkst.2012.30.4.033
Recent development and penetrating expansion in ICT(Information and Communication Technology) has brought considerable improvements in transportation services. However, there is a controversial debate whether transportation and communications behave as substitutes or as complements to one another. On this subject, recent studies considered those two industries as services, but transportation and communications are broadly put for intermediary goods into other industries. Hence, it is essential to examine this issue from understanding their relationships to each other with respect to manufacturing and services. In this study, input-output tables of benchmark years from 1980 to 2005 have been analysed to explore the relationships between transportation and communications using Spearman`s correlation analysis. The results show that both industries had complementary roles over the period, but, to some extent, changed into substitution roles in some categories.
Safe Driving Inducement Effect Analysis of Smart Delineator through Driving Simulation Evaluation
Ko, Han-Geom ; Kim, Ji-Ho ; Seong, Myung-Jae ; Lee, Jin-Soo ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 43~59
DOI : 10.7470/jkst.2012.30.4.043
Assuming a completed Smart Highway road & communication environment that allows real-time information collection and transmission of road traffic condition ahead, the purpose of this study is to develop a plan for inducing a network-level safe driving pattern by providing road traffic condition and safety information to multiple drivers through a road information provision device. In this study, the device with a function that displays different colors according to the hazard level to the existing delineator has been named `Smart Delineator`. Smart Delineator is a device that provides not only alignment information but also safety information for drivers to receive real-time warning information and intuitively recognize road traffic condition ahead so that drivers can respond. To examine the effects of safety driving inducement level on drivers, a simulation test was conducted using driving simulator as well as a satisfaction survey. The result showed that the Smart Delineator was able to identify the location of occurrence and affecting driving according pattern, either adhering to recommended speed or reducing speed according to the pre-defined hazard level.
A Study on the Factors Concerning Non-Work Trip of the Elderly People : A case of Seoul Metropolitan Area
Hahn, Jin-Seok ; Oh, Sung-Ho ; Park, Jong-Il ; Kim, Joon-ki ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 61~70
DOI : 10.7470/jkst.2012.30.4.061
This research explores different non-work trip characteristics between the elderly group (65+) and the working age group (20-64) using heteroscadastic ordered logit model. The analysis is based on travel survey data of Seoul Metropolitan area in 2006. The results show that age induces heteroscadasticity and the model provides a better fit than ordered logit model. The factors increasing the number of non-work trip of the elderly were driver`s license and household income. Conversely, the number of non-work trips decreased in those groups that were male, with a job, in aging, and with the number of preschool children. The factors having opposite effects (increased the number of non-work trips in the working age groups and decreased in the elderly group) between the elderly group and working age group were age and job.
Unifying the operation of Privately Funded Expressways
Shin, Yong-Suk ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 71~81
DOI : 10.7470/jkst.2012.30.4.071
The Korean government has actively accepted private investments in building expressways to improve its financial status. As of 2012, 422km of 9 private expressways are under operation, and until 2016 additional 15 are planned to be built with private investments. However, on average, each private expressway is at most 37km long, which works against economies of scale in maintenance and thus leads to inefficiencies such as traffic jams, driver inconveniences, and the increase in operating costs. To resolve these problems, the present study suggested that the maintenance and tolling system should be unified across each private operator. Unifying the operation of private expressways was expected to reduce user travel times and tolls, and save operator maintenance costs. These economic effects were expected to be tantamount to hundreds of billions of dollars. The shared toll collecting system will also reduce user`s delays by removing main line tollgates. This can save another hundreds of billions of dollars by ensuring driver`s convenience and safety.
Freight Demand Analysis for Multimodal Shipments
Hong, Da-Hee ; Park, Min-Choul ; Lee, Jung-Yub ; Hahn, Jin-Seok ; Kang, Jae-Won ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 85~94
DOI : 10.7470/jkst.2012.30.4.085
Modern freight transport pursues not only the reduction of logistic costs but also aims at green logistics and efficient shipments. In order to accomplish these goals, various policies regarding the multimodal shipment and stopover to logistic facilities have widely been made. Such situation requires changes in existing methods for analyzing freight demand. However, the reality is that a reliable freight demand forecast is limited, since in the transport research field there is no robust freight demand model that can accommodate transshipments at logistic facilities. This study suggested a novel method to analyze freight demand, which can consider transshipments in multi-modal networks. Also, the applicability of this method was discussed through an example test.
Characteristics of Geometric Conditions Affecting Freeway Traffic Safety at Nighttime, Sunrise, and Sunset
Hong, Sung-Min ; Kim, Joon-Ki ; Oh, Cheol ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 95~106
DOI : 10.7470/jkst.2012.30.4.095
Driver`s capability of identifying the change in freeway alignments and environments is one of important factors associated with traffic safety on freeways. In particular, driver`s visibility and recognition capability are highly dependent on the altitude of the sun by sunset, sunrise, and nighttime. The purpose of this study is to identify the characteristics of geometric conditions affecting crash occurrences at sunset, sunrise, and nighttime. Poisson and negative binomial regressions were adopted to predict freeway crash frequency in this study. Freeway crash data during 2007~2010 were used for developing the crash frequency models. A set of variables representing the characteristics of geometric conditions were identified as significant ones affecting crash occurrences. The results of this study would be useful in deriving effective countermeasures for preventing traffic crashes that mainly occur at sunset, sunrise, and nighttime on freeways.
Prevention of Habitual Drunk Driving through Analyzing Psychological Difference for each Group partitioned by the Number of DUI Records
Jang, Seok-Yong ; Park, Won-Beom ; Jung, Hun-Young ; Ko, Sang-Seon ; Baik, Sang-Keun ;
Journal of Korean Society of Transportation, volume 30, issue 4, 2012, Pages 107~118
DOI : 10.7470/jkst.2012.30.4.107
This paper investigated habitual drunk drivers` characteristics by grouping them by the number of DUI records, and customized countermeasures for each group. Theoretical models to accommodate underlying causes for drunk driving, which adopted the form of a path analysis, were developed based on psychological variables. According to the psychological paths to drunk driving, each group showed different defense mechanisms and different senses of guilty, shame and embarrassment. This provided a rationale for differentiating countermeasures for each group. Habitual drunk drivers were found to have a strong propensity of self-justification due to their defense mechanism. Thereby, it would be useless to simply discourage them from drinking and driving. Rather, more active measures such as locking devices, invalidation of driver license, and group counseling should be taken to stop habitual drunk driving. Furthermore, since habitual drunk drivers showed high projection propensity, it is necessary to force them to participate in a sensibility training program, which might entail the amendment of related laws or regulations.