• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.5D
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• pp.755-761
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• 2006

Though freight origin and destination data is essential for analysing transport investment and planning logistics facilities, the study on the establishment of the freight origin and destination data is very rare. The purpose of this study is to introduce a method on weight and expansion of sample freight data focusing on the Seoul metropolitan area. In particular, this study suggests the weight and expansion method which consider truck and commodity tonnage together. This paper also discuss the origin and destination trips in Seoul metropolitan area. This paper will contribute to establish more reliable freight origin and destination data.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.144-145
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• 2013

우리나라는 수출입화물의 99% 이상이 항만을 통해 해외로 운송되고 있는 관계로 해상화물 운송이 국가적으로 매우 중요한 역할을 수행하고 있다. 해상화물은 크게 일반화물(벌크화물)과 컨테이너화물로 구분되는데 컨테이너화물은 갈수록 그 비중이 증가하고 있어 국내 물류망 개선뿐만 아니라 물류비 인하와 관련해 매우 중요한 부분을 차지하고 있다. 따라서 컨테이너화물의 운송에 대한 기초 연구들은 사회경제적으로 매우 중요한 역할을 담당하고 있다. 본 연구에서는 2011년 기준 우리나라 컨테이너화물의 내륙기종점(O/D)에 관한 연구 분석결과를 중심으로 국내 수출입컨테이너의 주요 항만별, 수입 수출별, 내륙시도별 분포 현황을 살펴 본 후 그 시사점을 도출하고자 한다.

• Journal of Korea Port Economic Association
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• v.27 no.2
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• pp.195-215
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• 2011

The purpose of this article is to provide data to be utilized for marketing to attract future container cargo to the Korea-China Car Ferry Service and to estimate container traffic for the development of the International Passenger Terminal to be newly built in the Incheon Southern Port. An analysis of container traffic through the Passenger Terminal of Incheon Port showed that the container throughput of Incheon Port comprised 20% of traffic. The export cargo traffic in the International Passenger Terminal, 71.4%, or 111,698 TEU of 156,284 TEU in total, was brought from metropolitan areas. To increase the container traffic of the car ferry service currently concentrated on the metropolitan areas, more endeavor is required to strengthen marketing competence to attract container traffic to other regions apart from the metropolitan areas as well as provide general services.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.159-160
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• 2016

본 연구는 우리나라 수출입 컨테이너화물의 5대 내륙기종점 권역별로 항만집중도 및 변이효과를 분석함으로써, 항만간 경쟁 구도 및 효율적인 컨테이너부두 개발 및 운영에 대한 시사점을 도출하고자 한다. 2011년, 2006년, 2011년의 항만별 내륙기종점 조사자료를 바탕으로 허쉬만-허펜달지수 및 변이할당법을 활용하여 분석하였다.

• Journal of Navigation and Port Research
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• v.39 no.1
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• pp.61-67
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• 2015

Inland transport becomes more and more important in connecting ports with inland. Therefore, studying on cargo flow from ports to regions has been active in progress by many researchers. However current statistical data of freight flow from origin locations to destination locations does not reflect the exact characteristics of freight flow. Also, they also do not reflect the characteristics of multimodal transport system in which cargos go through intermediate locations such as logistics center or inland container depot. In growing up the emergent need of rebuilding statistical data for freight flow from origin locations to destination locations, this paper will propose a freight flow model with logistics center and it will be verified by genetic algorithm through the simulation scenarios.

• Journal of Korean Society of Transportation
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• v.22 no.1 s.72
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• pp.43-62
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• 2004

Conventionally the estimation method of the origin-destination Matrix has been developed by implementing the expansion of sampled data obtained from roadside interview and household travel survey. In the survey process, the bigger the sample size is, the higher the level of limitation, due to taking time for an error test for a cost and a time. Estimating the O-D matrix from observed traffic count data has been applied as methods of over-coming this limitation, and a gradient model is known as one of the most popular techniques. However, in case of the gradient model, although it may be capable of minimizing the error between the observed and estimated traffic volumes, a prior O-D matrix structure cannot maintained exactly. That is to say, unwanted changes may be occurred. For this reason, this study adopts a conjugate gradient algorithm to take into account two factors: estimation of the O-D matrix from the conjugate gradient algorithm while reflecting the prior O-D matrix structure maintained. This development of the O-D matrix estimation model is to minimize the error between observed and estimated traffic volumes. This study validates the model using the simple network, and then applies it to a large scale network. There are several findings through the tests. First, as the consequence of consistency, it is apparent that the upper level of this model plays a key role by the internal relationship with lower level. Secondly, as the respect of estimation precision, the estimation error is lied within the tolerance interval. Furthermore, the structure of the estimated O-D matrix has not changed too much, and even still has conserved some attributes.

• Journal of Korean Society of Transportation
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• v.20 no.7
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• pp.51-58
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• 2002

The purpose of this paper is to find some implications for Korean seaports in terms of operation and development of ports, in particular for attracting more transshipment container cargoes into major Korean seaports. This was accomplished by the O-D analysis between major Korean seaports and top 20 Chinese ports.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.06a
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• pp.91-92
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• 2013

With development of port industry, inland transportation was also the developed. Connecting port with inland becomes more and more important. So studies about cargo flow from ports to regions are actively in progress. But freight statistics from regional to national has a problem that do not comprehend exactly with freight flow. Also these statistics don't reflect characteristics of multimodal transportation system. The objective of this paper is to analyze freight flow of container with the introduction of P/C and rebuilding freight statistics from regional to national scale.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.05a
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• pp.1065-1068
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• 2008

RFID를 이용한 화물추적시스템은 물류분야의 특성상 서로 다른 소속의 이 기종 간의 데이터의 인터페이스로 화물의 흐름을 체계화한다. 국내뿐 아니라 국제적으로도 여러 종류의 데이터를 인터페이스하고 있으며, 이 데이터들은 EDI 표준을 이용하여 다양한 환경의 시스템으로 인터페이스 되어 적용되고 있다. 하나의 물류흐름을 만들기 위하여 RFID를 이용한 데이터의 인터페이스가 이루어지다 보니 다양한 보안상의 문제를 유발시키고 있는 실정이다. 본 논문에서는 인공신경망 회로를 이용하여 이 기종 간의 EDI 데이터 인터페이스 시 발생할 수 있는 보안상의 취약점을 미리 파악하여 적절한 조치를 취할 수 있도록 방향을 제시하였다.

• Journal of Korean Society of Transportation
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• v.29 no.2
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• pp.91-100
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• 2011

Hub network design for freight transportation is a decision process that determines hub locations together with freight transportation routes among shippers so as to ultimately minimize total logistics cost. This study presents the optimal location of hubs by strict hub network design policy with single allocation, which overcomes the limitation of Kim et al. (2008) that does not allow direct transportation among shippers. The greedy-interchange algorithm is employed for hub location decision process, and EMME/2 is adopted for the route searching process. Application of the processes to the nationwide highway network shows that the best hub locations in order are Seoul metropolitan, GyeongNam, Chung-nam, Jeon-Nam, Gyeong-Buk, Chung-Buk, and the locations are concentrated on the Seoul-Busan corridor. The strict hubnetwork design policy with single allocation increases the transportation distance but decreases the transportation cost by passing through the hubs instead of direct transportation. The reduction in total transportation cost can be achieved as the number of hubs increases, but the amount of the reduction gradually decreases because the cost reduction from the decrease in detour transportation distance between non-hubs and hubs becomes less than the discount reduction from dispersion of inter-hubs transportation volumes.