• 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.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.243-244
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• 2007

부산항에서 환적되어 일본으로 향하는 화물을 대상으로 각 일본항만까지의 해상운송에 지역별 JR(Japan Rail) 컨테이너센터까지의 내륙운송을 합한 이동경로와 비용에 관한 측면을 조사하여 이를 시나리오 분석을 이용하여 연구를 수행하였다. 일본을 네 개의 지역으로 나누어 일본의 항만을 큐슈, 동부, 중부, 관서지역으로 구분하였으며, 일본 주요대형항만과 중소형항만을 비교하여 효율적인 운송루트를 찾는 것에 중점을 두고 분석을 수행하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.07a
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• pp.251-253
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• 2015

선박에 의한 위험물 운송의 증가로 제정된 IMDG Code를 제정하고, 선원들은 그 규정에 따라 업무를 수행하고 있으며 몇 차례 개정이 되면서 위험물 안전운송 전문교육을 의무화하고 있다. 하지만 해마다 위험물에 의한 선박화재 및 폭발사고는 계속 일어나고 있으며, 이것은 위험물에 대한 기본 정보와 규정만 있으나 위험화물에 대한 자체 반응경로나 왜 규정대로 해야 하는지에 대한 정보가 선원들에게는 부족하다는 것을 알 수 있었다. 그리하여 최근에 발생한 선박화재 및 폭발사고 사례를 조사해보고, 적재된 화학물질 에 대한 기본정보를 분석하고 화재가 일어날 수 있는 가능성에 대해 화학적으로 접근 해석해 보았다. 화재의 원인은 다양하지만 기상 실험을 할 수 없는 어려움이 있어, 적재된 위험물의 정보와 대표적인 반응을 알아보고 화재원인을 가정해 보았다. 선원들은 IMDG Code에 대한 규정 이외에도 이러한 기본정보와 반응경로에 이해를 한다면 위험화물의 운송에 있어 위험한 환경요소를 제거할 수 있어 화재 및 폭발사고를 예방 할 수 있다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.05a
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• pp.151-153
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• 2019

우리나라 항만배후단지는 수출입 화주의 글로벌 SCM 지원 및 효율적 물류활동을 지원하고, 항만의 고부가가치화를 실현하기 위해 개발 및 운영되고 있다. 따라서 물류센터를 운영하는 항만배후단지 입주기업들은 다양한 부가가치 물류활동을 수행할 것으로 기대되었으나, 여전히 단순 보관기능 위주의 활동에 치중되어 있다는 비판을 받고 있다. 본 연구는 국내 항만배후단지 입주기업의 부가가치 물류활동 실태를 설문조사를 통해 분석하였다. 응답 입주기업의 44%가 단순 하역, 운송, 보관 기능만 수행하는 것으로 조사되었고, 5개 이상 부가가치 물류활동을 수행하는 기업은 전체의 11%로 낮은 수준으로 나타났다. 또한 포장, 분류, 라벨링 등 비교적 저수준의 부가가가치 물류활동이 전체 부가가치 물류활동의 약 60%로 나타났고, 2017년 기준 부가가치 환적화물의 처리 비중은 2.6%로 상당히 낮은 결과를 나타냈다. 항만배후단지 입주기업의 부가가치 물류활동 수준을 제고하고, 부가가치 환적화물 유치 강화 등을 위한 경쟁력 강화방안 마련이 요구된다.

• International Commerce and Information Review
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• v.14 no.3
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• pp.559-583
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• 2012

This study was conducted on the assumption that for Incheon international airport to become the logistics hub of northeast asia's region, it is necessary to investigate and analyze problems of forwarder's international air cargo transportation process, those factors and so on. The conditions of the process of international air cargo transportation was analysed individually according to the time required, satisfaction and problems of each step of process by dividing those into import and export. Consequently it turned out that the time required for the export process of the international air cargo transportation is longer by about 1 hour than the import process which means the improvement of import section rather than export is more urgent to improve the overall international air cargo transportation process. For the improvement of the process, it is also necessary to construct the international air cargo transportation' information system, secure competition of operating and to improve logistics standardization by considering all factors above.

• Journal of Korean Society of Transportation
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• v.20 no.3
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• pp.83-92
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• 2002

Freight mode choice models are essential to the analysis of many areas of transport research. However, observations of actual market choices have only been made in a limited number of situations. Therefore, stated preference(SP) techniques have emerged as an alternative source of actual market choices to be used for estimating freight mode choice models. Considerable confidence exists about SP data, but little consideration has been given to the potential for estimation bias. This paper has been motivated by the theoretical side of estimating SP discrete choice models, focusing on a case study of freight mode choice. Recently developed simulation methods are used to construct inherent random heterogeneity legit models, which consider individual heterogeneity, its inheritance to the next choices and overcome the independence from irrelevant alternatives (IIA) property. This Paper contributes to the development of models dealing with heterogeneity and its inheritance, and sheds light on the heterogeneity of freight transport.

• Proceedings of the KSR Conference
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• 2008.06a
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• pp.2343-2358
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• 2008

The modal spilt for road has been increased, but, for railroad it has been decreased from 17.2%(1990) to 6.3%(2006). It is important to study on improving competition for railroad transportation so that freight transport industry for railroad which is getting to decrease in Korea will be increased. The objective of this study is to analyze the competitiveness of railroad transport compared with road by providing a high-speed railway. The indicators representing the competitiveness of railroad transport are determined. The main influenced factors for mode choice include transport cost, transport time, level of service. Precisely, three commodities type, container, cement, steel, are analyzed.

• Journal of Korea Port Economic Association
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• v.25 no.3
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• pp.117-138
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• 2009

Heavy truck traffic causes serious damage to not only environment condition due to the emissions but also pavement condition. In Incheon city area, the highways of the port hinterland suffer from similar problems. Therefore, it is required to develop a policy to solve those problems, which should be under the collective agreement of the truck drivers, local residents, and policy makers. This paper compared the truck traffic volumes and re-pavement construction history for last 4 years and showed the real effect of the heavy truck traffic on the pavement. Furthermore, this study examined the pros and cons of the exclusive truck lane and truck only highway policies and conducted a survey of truck drivers, local residents, and policy makers. Each group showed different preferences for the policies particularly for the question asking the best implementable policy.

• Journal of the Economic Geographical Society of Korea
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• v.14 no.4
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• pp.540-552
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• 2011

Freight travel pattern has been less studied comparing with the field of passenger travel. Nonetheless, the importance of the freight travel has been increasing in urban travel sector, and the research needs on the freight travel demand hence is increasing. The current paper aims to identify, by tons of freight trucks and cargos, the characteristics of mean travel pattern, efficiency or performance, and the characteristics of freight trip chain regarding destination location, destination type and freight type. The study analyzed the nation-wide data of freight travel behavior survey. This study intended to set the starting framework of decision-making principle in freight travel, which has already been popular in passenger travel study. Findings suggest that those characteristics are clearly distinguished among trucks and cargos of different sizes of tons. The results are expected to provide important insight to the development of relevant transportation policy measures.

• Journal of Korea Port Economic Association
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• v.24 no.2
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• pp.265-287
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• 2008

This paper studies the economic effects of port-liquid freight by focusing on Ulsan port and its regional economic effects. The direct industrial effects of port-liquid freight are analysed to be an increase in about 1billion dollars' worth of production of the regional port-logistic industry, an increase in about 0.22billion dollars' worth of value-added of the industry, and the creation of about 2,600 employment in the industry. Including the indirect effects, the total effects on Ulsan regional economy are estimated to be an increase in about 1.9billion dollars worth of production, an increase in about 0.51billion dollars' worth of value-added and an increase in about 6,442 employment.