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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 25, Issue 6 - Dec 2007
Volume 25, Issue 5 - Oct 2007
Volume 25, Issue 4 - Aug 2007
Volume 25, Issue 3 - Jun 2007
Volume 25, Issue 2 - Apr 2007
Volume 25, Issue 1 - Feb 2007
Selecting the target year
The Efficiency and Equity Analysis of Cordon Pricing in the Capital Region
Jo, Eun-Gyeong ; Kim, Seong-Su ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 7~21
The purpose of this study is to examine the transportation, equity and efficiency impacts of cordon pricing schemes in the Seoul Capital Region of Korea. Autos would be required to pay a toll of 2.000 Won each time they enter cordons around the CBD or the subcenters during morning peak periods. The imposition of the toll would produce a substantial decrease in traffic volumes within the cordons as well as throughout the Capital Region. The lower the income level of commuters is, the more the share of auto decreases and that of transit increases. For equity impacts, the welfare of commuters would increase or decrease according to the cordon pricing schemes but would produce progressive impacts irrespective of the schemes. However, the commuters who have the highest value of time would experience welfare gains and it would result in regressive impacts. The schemes would result in a substantial net social welfare gain for the efficiency impacts. When the toll is charged at the CBD cordon only, the net social welfare would increase more.
A Study on Improvement of Design Method for Freeway Diverging Areas
Park, Jae-Beom ; Lee, Seung-Jun ; Gang, Jeong-Gyu ; Kim, Il-Hwan ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 23~35
Freeway diverging areas are very vulnerable to traffic accidents due to abrupt vehicle speed changes and geometric changes. Therefore, in designing diverging areas, much attention should be Paid to safety The Present design criteria about freeway diverging areas regulate transition sections for lane changes, deceleration lanes, transition corves for direction changes. and other similar items. However, the design criteria were often violated in implementation because of ambiguities in the criteria. This study aims at clarifying and improving the present design criteria for freeway diverging areas. For this, field survey data and traffic accident data for diverging areas were analyzed.
A Study on Inter-agency Fare Allocation Methods under the Integrated Distance-based Fare System in Seoul
Yun, Ji-Hyeon ; Kim, Seong-Su ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 37~47
The Integrated Public Transport Reforms of the Seoul Metropolitan Government, which were implemented on the
of July. 2004, launched a new fare allocation method. However, when a Private transit operator or a new transport system is introduced into the existing system, it will cause an allocation problem. Therefore, this study aims to Propose a rational fare allocation method which can be applicable regardless of the number of Public transportation modes or operators. To create alternatives, this study has adopted a fundamental principle of revenue allocation methods for the transit or communications sectors, and has applied it to the current transit system of Seoul. This study kas analyzed results of the cost recovery ratios and characteristics of each alternative through case studies. This study kas Presented an assessment criterion Z in order to select an optimal alternative. The criterion consists of the sum of the cost recovery ratio of each operator and the difference of the cost recovery ratio for each agency in inter-agency transit. Using the assessment criterion. the results showed that Alternative 1 is superior to the others : Alternative 1 is considering passenger-km of each operator and unit cost of passenger-km for each operator.
A Study on the Evaluation of Value for Money in Private Provided Infrastructure with a Focus on BTO Projects
Baek, Seong-Jun ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 49~59
This study has examined the allocation of risk in Korea's private provided Infrastructure(PPI) with the following contents (1) Developing a quantitative risk allocation model for Korea's PPI and (2) examining the implication of changes in the minimum revenue guarantees (MRG) clause of government legislation using the developed empirical model. The model of this study adopts and extends H. Yamaguchi's model developed in 2002. To investigate Korea's actual risk allocation deals, the author incorporated the MRG framework. The payment related to the MRG is indeterminable. Hence. the average MRG rate was calculated using probabilistic risk analysis. The risk allocation model is applied to the two eases to validate the model and evaluate the project's VFM(Value for Money). As the revenue guarantee rate is lowered, the government subsidies are increased. This in turn worsens VFM. The same relationship is true when the revenue guarantee Period is shortened
Determinants of Domestic Shippers' Location Choice Decisions
Kim, Chan-Seong ; Seong, Hong-Mo ; An, Seung-Beom ; Ye, Chung-Yeol ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 61~71
This study examines the determinants of location decisions for domestic skippers and identifies them with the aid of the location choice model The authors have used Korea's commodity flow survey collected by the inter-regional shippers as well as socio-economic indicators. The results suggest that the location of shippers depend on agglomeration economies, market size, and logistics activities. Finally. this study suggests the direction of locational Policies to help the Korean government with logistics-related policies.
Analysis of Driving Conditions and Traffic Accidents in the Case of Trumpet Interchange Ramps
Kim, Tae-Yeong ; Park, Byeong-Ho ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 73~79
This study deals with traffic accidents at the ramps of trumpet interchanges. The purpose of the study is to analyze the relations between tke turning direction of ramps (and combinations with other factors) and traffic accidents. In Pursuing this analysis, this study gives particular attention to the combination of turning direction and grade and the combination of turning direction and radius of curvature in the case of the trumpet interchange ramps. The null hypothesis tests show that the average accident number and average accident rate ate rejected at the 90% and 95% significance level respectively Also. the null hypothesis tests show that the combinations or turning direction and Evade as well as turning direction and radius are all rejected at the 95% significance level. In summary, right turn movements ate more dangerous than left turns on the trumpet interchange vamps. Also, ramps with a right turn and up grade or with a left turn and radius more than 200m have more traffic accident Potential than other types of ramps.
A Study for Measuring Service Quality in Incheon International Airport Focusing on the Passenger Terminal
Hong, Seok-Jin ; Lee, Jae-Hwan ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 81~91
Incheon International Airport (IIAC) has been named "best airport worldwide" according to the AETRA Passenger survey Program that was jointly administered by Airports Council International (ACI) and the International Air Transport Association (IATA) in 2005. This paper identifies eight dimensions underlying the overall service qualify in passenger terminals. These eight elements were found from literature reviews through relevant documents. The research explains the linkage between the overall satisfaction with IIAC and five services that influence that satisfaction. The five services are the following: service quality of passenger terminals, commercial facility services, easy access by transportation, service quality of the airlines, and contributions to the community by IIAC. The data envelopment analysis (DEA) designed by Cook and Kress (CK Model) was used to maximize the efficiency of commercial facility services, easy access by transportation, service qualify of the airlines, and contributions to the community by IIAC because the model best provided practical plans for a more competitive airport. This paper has three significant results. First, it includes research of passenger terminal-oriented service quality. Second, the author researches service qualify focusing on a three-cornered relation among passengers, airline employees, and IIAC. Third, the paper contains research of service quality focusing on IIAC's employees.
A Casual Correlative Analysis of Bus Driver Job Satisfaction on Passenger Service Performance
Gwon, Yong-Seok ; Kim, Jeom-San ; Park, Jun-Sik ; Lee, Chang-U ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 93~105
To raise transit ridership, it is necessary to expand transit facilities in long term Plans and to raise passengers' satisfaction by improving bus service qualify in short term Plans. In this study, the relationship between bus driver job satisfaction and Passenger service Performance is analyzed. The results of the study indicate that a driver s job satisfaction has an influence on accident rates. However, even when job satisfaction is not very high, if food resting facilities and Policies ave Provided then the Probability of an accident tends to decrease. To improve job satisfaction, several things should be done, such as stabilizing employment, creating fair company policies, improving overall employee welfare, and enhancing driver achievement from working. The satisfaction from salary is also an important factor and drivers are satisfied when they earn more money relative to other companies' drivers and when they aye satisfied with their salary increases. Therefore, creating appropriate monetary incentives would be a food policy for improving bus driver job satisfaction. This study serves as pilot research to make a foundation for further research about job satisfaction in the public transit field.
Multinomial Logit Modeling: Focus on Regional Rail Trips
Kim, Gyeong-Tae ; Lee, Jin-Seon ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 109~119
Increasingly, the emphasis in regional Passenger rail Planning is finding ways to more efficiently use existing facilities, with particular attention being Paid to Policies designed to spread Peak-Period travel demand more evenly throughout the week with consideration of train classification. In this context the individual's choice of time to travel is of crucial significance. This paper investigates the use of multinomial logit analysis to model ridership by rail classification using data collected for travel from Seoul to Busan during the one week in October 2004. The Particular model form that was successfully calibrated was the multinomial logit (MNL) model : it describes the choice mechanism that will Permit rail systems and operations to be planned on a more reliable basis. The assumption of independently and identically distributed(IID) error terms in the MNL model leads to its infamous independence from irrelevant alternatives (IIA) property. Relaxation of the IID assumption has been undertaken along a number or isolated dimensions leading to the development of the MNL model. For business and related rail travel patterns, the most important variables of choice were time and frequency to the chosen destination. The calibrated model showed high agreement between observed and Predicted market shares. The model is expected to be of use to railroad authorities in Planning and determining business strategies in the Increasingly competitive environment or regional rail transport.
Missing Data Imputation Using Permanent Traffic Counts on National Highways
Ha, Jeong-A ; Park, Jae-Hwa ; Kim, Seong-Hyeon ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 121~132
Up to now Permanent traffic volumes have been counted by Automatic Vehicle Classification (AVC) on National Highways. When counted data have missing items or errors, the data must be revised to stay statistically reliable This study was carried out to estimate correct data based on outoregression and seasonal AutoRegressive Integrated Moving Average (ARIMA). As a result of verification through seasonal ARIMA, the longer the missed period is, the greater the error. Autoregression results in better verification results than seasonal ARIMA. Traffic data is affected by the present state mote than past patterns. However. autoregression can be applied only to the cases where data include similar neighborhood patterns and even in this case. the data cannot be corrected when data are missing due to low qualify or errors Therefore, these data shoo)d be corrected using past patterns and seasonal ARIMA when the missing data occurs in short periods.
A Nested Logit Model of Auto Ownership and Vehicle Type Choices
Park, Sang-Jun ; Kim, Seong-Su ;
Journal of Korean Society of Transportation, volume 25, issue 1, 2007, Pages 133~141
The study examines households' auto ownership and car type choice with a nested legit model. In summary.
and the inclusive values, which represent the goodness of fit of the model, are statistically significant. Therefore. the nested logit model is superior to the standard legit model in this case. Also. the elasticity of operating costs is larger than 1, which means households' car ownership and car type choice is very sensitive to the operating costs. Finally, the elasticity of the operating costs in the lower income group is higher than that or the operating costs in the higher income group.