• Proceedings of the KOR-KST Conference
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• 1998.10b
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• pp.507-507
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• 1998

화물 수송은 상품의 생산과 소비에 직결되어 있으며 원활한 화물 수송이 경제에 미치는 영향이 크므로 그 중요성이 날로 증대되고 있다. 우리 나라는 그 동인 지속적 경제 성장으로 인한 경제 규모가 확대되면서 화물 수송에 대한 수요가 급격히 증가하였다. 이러한 화물 수송 수요의 증가 추세에 비해 물류 단지의 확충에 위한 적절한 투자 및 정책 등이 결여되어 왔다. 그러므로, 경제 및 산업발전에 중요한 역할을 담당하고 있는 물류 단지를 파악하고 물류 단지 입지 결정 모형을 개발하고, 이 모형을 토대로 적정 입지를 결정하고자 한다. 물류 단지 입지에 관한 문제의 주요 관심 대상은 수송비용을 최소화하면서, 원하는 목적지까지의 빠른 수·배송을 이루어지게 하는 효율적 수송 입지 단지를 찾는데 있다. 따라서 본 연구에서는 물류 단지의 적정 위치 결정을 위하여 혼합 정수 모형을 이용해서 수송비용과 차량 경로를 고려한 수학적 모형을 개발하고자 한다. 개발된 모형을 공로부문의 수송을 중심으로 경기도 지역의 여러 물류 단지 후보 지역에 적용하고 적정 물류 단지를 찾고자 한다.

• Proceedings of the KOR-KST Conference
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• 1998.10b
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• pp.529-529
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• 1998

운송 서비스산업에 대한 지속적인 규제완화는 운송 기업의 진입 및 퇴출을 자유롭게 하였고, 외국 기업의 국내에서의 영업 활동이 가능하게 했을 뿐 아니라, 업종간 분류를 무의미하게 하여 운송기업은 전방위 경쟁을 피할 수 없게 되었다. 이러한 경쟁 환경하에서 운송 기업의 효율적인 운영은 국가 물류비 절감 측면에서, 그리고 해당 기업의 사활 측면에서 매우 중요한 의미를 갖는다. 소화물 일관 수송은 택배 또는 특송이라 불리우는 운송 서비스업의 일종으로, 화주 한명의 화물량이 차량 한 대 분량에 못 미치고, 고객이 원하는 출발지에서 목적지까지 운반해주는 특성을 가지고 있다. 소화물 일괄 수송은 지역을 순화하면서 화물을 접수하여 인근 터미널까지 운반하는 수집과정, 터미널과 터미널을 연결하는간선수송 과정, 터미널에서 최종 목적지까지 운반하는 배달과정을 거쳐 이루어진다. 본 연구를 통하여 터미널과 터미널을 연결하는 간선 수송과정에서 발생하는 비용을 줄이는 화물운송경로를 찾아주는 네트웍 최적화 모형이 개발되었으며, 이를 실제 업무에 적용하여 화물운송 경로를 조정함으로써 적재율 20%이상 개선, 운송비용 10%이상 절감이 가능함을 확인하였다.

• Journal of Korean Society of Transportation
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• v.26 no.5
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• pp.7-16
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• 2008

There are unique aspects of truck vehicle movements compared with the personal travel in trip chaining. This paper reports an analysis on the truck vehicle trip chaining which intercity/metropolitan/intraregional trips are classified. Data collected from the travel dairy survey is used the truck trip-chaining analysis. The pattern of trip chaining classes is classified by the GIS mapping based on orgin-destination trip information. The physical index and efficiency index for each trip diary is used to the truck vehicle activity. Truck trips lengths and time differs from its truck type, service type and travel patterns. It is shown that the efficiency of the truck trip chaining depends on vehicle types and its delivery patterns. There are many other topics for research on trip chaining modeling such as the classification of trip chain, time use and mode choice by trip chaining.

• Journal of Korean Society of Transportation
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• v.27 no.4
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• pp.145-154
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• 2009

The main goal of this paper is to develop a methodology for increasing the reliability of truck OD matrices in Seoul Metropolitan Area. We propose a Hybrid Method made up of five processes by using Non-Traffic Assignment and Gradient Method. A Hybrid Method and Gradient Method have applied for comparison and estimation in Seoul Metropolitan Area. Mean Error and Root Mean Square Error of a Hybrid Method present lower than Gradient Method. The findings of this paper show that the new truck OD matrices created by a Hybrid Method are more reliable than the existing truck OD matrices in the Seoul Metropolitan Area.

• Journal of Korean Society of Transportation
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• v.22 no.3 s.74
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• pp.167-177
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• 2004

The Hub-and-spoke strategy is widely used in the field of transportation. According to containerization and the development of transshipment technology, it is also introduced into European rail freight transportation. The objective of this article is to develop a service network design model for rail freight transportation based on the Hub-and-spoke strategy and efficient algorithms that can be applied to large-scale network. Although this model is for strategic decision, it includes not only general operational cost but also time-delay cost. The non-linearity of objective function due to time-delay factor is transformed into linearity by establishing train service variables by frequency. To solve large scale problem, this model used a heuristic method based on decomposition and three newly-developed algorithms. The new algorithms were examined with respect to four test problems base on the actual network of European rail freight and discussed the accuracy of solutions and the efficiency of proposed algorithms.

• Journal of Korean Society of Transportation
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• v.31 no.3
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• pp.3-18
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• 2013

This study develops a forecasting method to estimate air cargo demand from ICN(Incheon International Airport) to all airports in EU with Seasonal Autoregressive Integrated Moving Average (SARIMA) Model using volumes from the first quarter of 2000 to the fourth quarter of 2009. This paper shows the superiority of SARIMA Model by comparing the forecasting accuracy of SARIMA with that of other ARIMA (Autoregressive Integrated Moving Average) models. Given that very few papers and researches focuses on air route, this paper will be helpful to researchers concerned with air cargo.

• Journal of the Korea Society of Computer and Information
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• v.27 no.1
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• pp.157-166
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• 2022

In this study, The goal is to analyze the feasibility of introducing a Piggyback system that can reduce the time and cost incurred by transshipment work and improve the transportation speed when transporting complex cargo by rail. To this end, the feasibility analysis methodology is reviewed through domestic and international literature review. In order to quantitatively derive the feasibility analysis values, a transportation database was applied to develop a freight transport simulation model and a freight demand prediction model for major freight transport O-D routes with a transportation distance of 200 km or more. As a result of analyzing economic feasibility by setting the analysis period to 15 years on the premise that the Piggyback System will be introduced on major cargo transport O-D routes in 2025, the NPV value was positive and the B/C value was 1.18, indicating that the Piggyback system was economical. The proposed research method can be meaningful data for establishing transportation policies that can improve the competitiveness of railroad transportation.

• Journal of Korean Society of Transportation
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• v.28 no.1
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• pp.77-86
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• 2010

The study developed physical distribution channel choice models reflecting decision making of the firms and studied how choice decision factors influence selection of distribution channel. The distribution channel survey data in Korea was used to do empirical study. As a choice set, distribution channels were classified into two main choice channels: direct and indirect channels. In addition, indirect channels were classified into other three channels according to the type of intermediate point: distribution center, wholesale store, and agency. This study developed choice models by applying both binary and multinomial logit model with various set of factors. The results showed that the developed logit models seemingly reflect distribution channel choice behaviors. The hypothesis tests on how each factor influences choice of distribution channel were performed and discussed as well.

• The Magazine of the IEIE
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• v.24 no.2
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• pp.41-49
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• 1997

본 논문에서는 전자, 통신, 제어, 컴퓨터공학 등의 첨단기술을 교통공학에 응용하여 기존의 도로 효율성을 극대화 시키는 방안으로 제시되고 있는 첨단 교통체계(ITS)연구의 기반시스템인 지능형 교통관리체계(ATMS)의 시스템 구성 및 제공서비스를 개관하였다. 연구범위는 ATMS의 개념 및 정의, 시스템의 기능적 요구사항 및 기본구상, 그리고 제공서비스의 종류를 살펴보았다. 향후 지능형 교통관리체계는 대도시 교통 소통을 완화시키는 방안으로서 도시가로에 영향을 미치는 교통정보 제공시스템, 주행안내시스템, 대중교통 및 화물운송 체계 등과 연계되는 종합교통체계 구축의 기반이 될 것으로 기대된다.

• Journal of Korea Port Economic Association
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• v.27 no.2
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• pp.137-161
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• 2011

This paper deals with modal shift projects and policy of modal shift services at home and abroad. This study aims to review the results of foreign modal projects in advanced countries and to suggest policy directions for promoting modal shift services in Korea. This paper consists of three main sections: concept of modal shift policy; analysis of modal shift projects and policy at home and abroad; policy directions of modal shift services in Korea. In recent years, shippers who shift mode from truck to rail or coastal shipping are subsidized by the government. The government intends to encourage modal shift services of shippers, as shown in the example of Marco Polo in EU. It is identified that the government should devise effective policy for the successful implementation of truck-rail modal shift in Korea. It is suggested that the policy goal of modal shift must be clear and its attainment is feasible in order to promote modal shift services here. It also turns out that indirect supply policy works better than direct one. Freight transport environments differ between countries. It, thus, hard to directly apply foreign policies to Korea's freight transport field. Korea is at an inceptive stage of exploring foreign modal shift policies and promoting modal shift services in Korea. We will gain from the wide range of case studies, which analyze the modal shift successes and failures experienced by advanced countries. It is necessary to use them with care.