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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 19, Issue 6 - Dec 2001
Volume 19, Issue 5 - Oct 2001
Volume 19, Issue 4 - Aug 2001
Volume 19, Issue 3 - Jun 2001
Volume 19, Issue 2 - Apr 2001
Volume 19, Issue 1 - Feb 2001
Selecting the target year
A Study on Operation Efficiency of Container Port by Comparison of Similar Ports
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 7~16
The Principle objective of this paper is to introduce a systematic approach to identifying similar container ports in Asia. For this, it analyses data on port facilities, port facility availability, port service level total container throughput, and economic index, by using Multidimentional Scaling (MDS) method. Based on the analysis it identifies five groupings of similar container ports in Asia within which Port comparison can be justifiably made, evaluates a present position of five groupings on the basis of factors used to compare container ports in Asia ; and finally proposes policy implications for operation efficiency of Pusan container port in comparison with Kaohsiung Port. The major implication is that both the Kaosuing and the Pusan port have to strengthen port facility to attract more traffic, and particularly, Pusan Port has to reinforce the number of berth, total length of berth. and yard areas.
Logistics Cost Analysis on Electronic Commerce(EC) by Delivery Type
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 17~28
The purpose of this study is to analyze logistics cost of transportation systems on EC(electronic commerce) between company and consumer. Transportation system in logistics is classified by three types on EC. The first type is the direct delivery from supply factory to consumers(type I). The second type is the delivery through distribution center in each area by owner logistics company (type II). The third type is the commission of delivery to the third party logistics company(type III). The logistics of EC has various service characteristics such as dealing with small quantity, various goods, and high frequency. This study assumes that all day's order is delivered on a next day. The logistics cost function is calculated according to the number of orders, delivery distance, transport quantify. and allocated freight trucks for daily order of the subject zone. The logistics cost changes according to the daily order characteristics. Therefore it is simulated to analyze the logistics cost change that considers the type of transportation's order characteristics. As a result of analysis, if the number of order is less than 10 and the quantify of each order is less than 10kg, type III has an advantage over the others And if the number of order is more than 10 and the quantity of each order is more than 10kg, type I has an advantage in the same zone and type II has an advantage in the other zones. This study is limited on the actual application because this study doesn't consider logistics infra of supply company and transport service time. If further study that considers these factors is implemented, it can estimate more accurate logistics cost on EC and propose an efficient freight transport alternatives to the company. This study attributes to estimate the logistics cost change over the frequency of daily order, the quantify of supply goods, and the transport distance on EC.
Exploring the Link between Transportation and Land Use Planning with Reference to the British Planning Policy Guidance 13 and Local Transport Plan
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 29~52
The purpose of this paper is to pursue a case study of urban land use and transportation linkage policies based on a British city of Cardiff, Wales. To this end, the paper combines a review and synthesis of available land use and transportation planning sources, and a series of interviews with planners and a extensive survey of planning policy documents to assess the effectiveness of policy instruments in the city context. Considerable emphasis is placed on the analysis of the British land use and transportation planning in terms of the Policy guidance notes 11, 12 and 13 as well as the local transport policy guidance. The paper highlights the fact that the Cardiff unitary development plan and the local transport plan form a policy framework of integrating land use and transportation planning process, employing travel demand management schemes and implementing the various strategy components on the overall aim of achieving and maintaining a sustainable city.
National Highway's Design Criteria Based on Analysis of Functional Classification
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 53~61
This study shows that a functional order relationship of national highways in rural areas, which provides the functional system as a principal and minor arterial highways, can be established by the use of statististics. As a result, the adequate functional design criteria of those highways are proposed on the basis of the traffic characteristics in those areas. According to those statistical studies, a function of national highways in the national road network is proved to form three categories broadly. Especially, the survey results based on the traffic characteristics on each road sections show that the initially constructed national highways can not provide an adequate functional role as the arterial highways in the studied areas. In order to operate the intended national highways functionally as the arterial highways, the functional design criteria of highways and the standard order of highway facilities based on the design traffic speed should be considered as an alternative.
A study on the Establishment of Transportation Policy of Korean Peninsula Based on the Case Study of the Unified Germany
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 63~73
This study focuses on the analysis of the changes of transport policies before and after the German Unification. It shows also the efficient strategies of transport in the process of Korean Reunification by the analysis of trials and errors in German case. This study is composed of four parts : First. Korean Peninsula is compared with Germany in terms of economical, social and infrastructure situation before and after the Unification. Secondly, Germany had very important task that is to connect West-Germany with West-Berlin located in the middle of East-Germany. Two nations had long and complicated discussions for this connection and this can show us many lessons in the consideration of the connection of Gyoungui-Line. Especially, it shows problems in the management of this connectors such as the misuse of connectors as escape routes and the conflict in the calculation of toll between two nations. Thirdly, the transport plans after the Unification in Germany are analyzed and this can provide some lessons in the long term planning : German Federal Transport Plan 1992, Transport Projects for the German Unification and other institutional supports. Finally, five strategies and five important projects are proposed for the Korean Reunification in the consideration of many lessons from German Unification.
Development of a demand estimation method by using multiclass traffic assignment based on traffic counts
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 77~88
Until now, though most of the studies related to demand estimation method using traffic counts use methods based on singleclass, travel demands or flows are made by mixing various vehicles in real networks. In general, existing demand estimation methods based on traffic counts estimate O/D by converting a multiclass O/D matrix and traffic counts into a singleclass O/D matrix and traffic counts through PCE conversion, and analyze a O/D matrix by dividing into a multiclass O/D matrix and traffic counts after multiplying an estimated O/D matrix by the fixed ratio of a singleclass O/D matrix and traffic counts before PCE conversion. However, the merits of a demand estimation method based on multiclass calculate each route choice ratio about multiclass O/D, and maximize the estimation capability of multiclass by calculating each gradient, the reduction direction of objective function. Therefore, this study aims to establish a demand estimation method which considers congestion between vehicle and vehicle by using multiclass instead of singleclass.
Optimal Network Design Using Sensitivity Analysis for Variable Demand Network Equilibrium
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 89~99
The conventional studies on equilibrium network design problem(ENDP) with fixed travel demand models assume that the future OD travel demand might not be changed even if the structure and the capacity of the network are improved. But this fixed demand assumption may loose its validity in the long-range network design because OD travel demand actually shifts with the network service level. Thus, it is desirable to involve the variable travel demand which is determined endogenously in the model in the optimal network design. In this paper a hi-level model formulation and solution procedure for ENDP with variable travel demand are presented. Firstly It is considered how to measure the net user benefits to be derived from the improved in link capacities, and the equilibrium network design problem considered here is to maximize the increase of net user benefit which results from a set of lift capacity enhancements within the budget constraints, while the OD travel demands and link travel times are obtained by solving the lower level network equilibrium problem with variable demand. And secondly sensitivity analysis is carried out to find the links to which the network equilibrium flow pattern is the most sensitive. Finally numerical example with simple network is carried out to test the validity of the model.
A Comparative Study about Industrial Structure Feature between TL Carriers and LTL Carriers
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 101~114
Transportation enterprises should maintain constant and qualitative operation. Thus, in short period, transportation enterprises don't change supply in accordance with demand. In the result, transportation enterprises don't reduce operation in spite of management deficit at will. In freight transportation type, less-than-truckload(LTL) has more relation with above transportation feature than truckload(TL) does. Because freight transportation supply of TL is more flexible than that of LTL in correspondence of freight transportation demand. Relating to above mention, it appears that shortage of road and freight terminal of LTL is larger than that of TL. Especially in road and freight terminal comparison, shortage of freight terminal is larger than that of road. Shortage of road is the largest in 1990, and improved after-ward. But shortage of freight terminal is serious lately. So freight terminal needs more expansion than road, and shows better investment condition than road. Freight terminal expansion brings road expansion in LTL, on the contrary, freight terminal expansion substitutes freight terminal for road in TL. In transportation revenue, freight terminal's contribution to LTL is larger than that to TL. However, when we adjust quasi-fixed factor - road and freight terminal - to optimal level in the long run, in TL, diseconomies of scale becomes large, but in LTL, economies of scale becomes large. Consequently, it is necessary for TL to make counterplans to activate management of small size enterprises and owner drivers. And LTL should make use of economies of scale by solving the problem, such as nonprofit route, excess of rental freight handling of office, insufficiency of freight terminal, shortage of driver, and unpreparedness of freight insurance.
Development of a Cycle-free Based, Cooridinated Dynamic Signal Timing Model for Minimizing Delay (Using Genetic Algorithm)
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 115~129
The purpose of this study is to develop a cycle-free signal timing model for minimizing delays based on Third-generation control concept using Genetic Algorithm. A special feature of this model is its ability to manage delays of turning movements on the cycle basis. The model produces a cycle-free based signal timing(cycles and green times) for each intersection to minimize delays of turning movements on the cycle basis. The performance of cycle-free signal timings was evaluated on normal (v/c = 0.7) and oversaturated (v/c=1.0) conditions. The performance measures are throughput and the number of queued vehicles at the end of green time. The result shows that the cycle free signal timing is superior to the fixed signal timing to manage traffic flows of intersections; (1) the proposed model accomplishes the basic objective of the research, producing cycle free signal timings on the cycle basis, (2) on normal conditions, cycle free signal timings produce less queued vehicles at the end of green time, and (3) on oversaturated conditions, the cycle free signal timing is superior to the fixed signal timing to manage saturated traffic flows of intersections.
An Estimation of Driving Aptitude Effect on Traffic Safety
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 139~148
Uniform Event-Reaction Formula for Incident Management strategy
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 149~157
Dynamic Traffic Assignment Techniques for General Road Networks
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 161~162
A Neural Network Approach to Air Cargo Fleet Assignment
Journal of Korean Society of Transportation, volume 19, issue 1, 2001, Pages 163~164