• Journal of Korean Society of Transportation
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• v.27 no.5
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• pp.195-208
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• 2009

A network design problem (NDP) formulated as a mathematical program is generally used to find an optimum value to minimize or to maximize some objectives such as total travel time, social benefit, or others. NDP has, however, some limits of describing components of travel patterns like activities and trip generation due to its modeling simplicity, and also it has difficulty in including attributes of regional planning. In order to cope with such limits, this paper extends NDP to the urban planning field and proposes a mathematical program which can describe the interactions between urban social activities and transportation planning. Based on this model the authors try to optimize both urban activities and the transportation system. The model developed in this paper is tested to assess its application with a real-size regional transportation network.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.9
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• pp.6368-6375
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• 2015

The goal of this research is to identify the energy planning techniques of Smart Green City and to establish the realized plan through the analysis of Multi-functional Administrative City. For the research, eighteen planning techniques were derived and categorized into three sectors and six basic direction through literature review and Brain-storming analysis considering correlation between three goals of Smart Green City and expectation of planning technique. And Multi-functional Administrative City was analyzed for the current status of application of planning techniques focus on two application aspects. In conclusion, 'Establishing Integrated Management Center for Urban Energy', 'Building Energy Management System', 'Building Automation System', 'Green Transport System', 'Intelligent Transport System', 'Introduction of Eco-friendly Transportation' planning techniques in reduction of building energy consumption sector and green-intelligent transport system sector were identified as important techniques for Smart Green City.

• 한국지형공간정보학회:학술대회논문집
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• 2002.03a
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• pp.113-118
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• 2002

본 연구에서는 최종목표인 교통 정보 관리시스템을 개발하기 위하여 1) GIS, 2) 교통시설정보, 3) 교통사고정보를 하나로 통합 운영하는 시스템을 구현하였다. 이를 위해 현재 이용되고 있는 교통시설정보 및 교통사고정보의 관리 현황을 분석하고 교통 정보 관리시스템 설계를 위한 정보를 획득하였다. 수집된 설계 정보를 바탕으로 교통 정보 관리시스템 Logic을 설계하고 설계된 Logic을 기반으로 교통시설관리 시스템과 교통사고관리 시스템을 각각 구현하였으며, 구현된 시스템을 통합하여 교통 정보 관리시스템을 구축하였다. 마지막 단계로 개발한 시스템의 평가를 위해 통합 시험을 실시하고 문제점을 파악함으로써 효율성 높은 교통 정보 관리시스템을 개발하였다. 고도의 정보화 사회에서 지형공간과 관련된 시설물 정보를 비롯한 다량의 정보를 신속히 처리하고 계획 변경 및 시설물의 위치, 보수 및 관리에 있어서 본 연구의 기법을 활용하면 계획수립 및 의사결정에 효율성을 높일 수 있다고 사료된다.

• Proceedings of the KOR-KST Conference
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• 1995.05b
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• pp.312-337
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• 1995

0 현 철도조직의 운영 실태는 지능식 조직에 따른 수직적 계통의식의 심화로 부문간 협조체계가 미흡하고, 경영성과에 대한 책임소재가 불분명하며, 원가의식이 희박한 것으로 진단하고 있음 0 공사화를 계기로 시장원리에 의한 책임경영 확보를 위해 조직구조를 포함한 경영체제를 다음과 같이 개편할 계획임 0 조직구조는 현 조직을 전면 해체하여 사업부제 구조로 개편하고자 함 기본구조는 본사스랩, 사업본부, 직할기관, 지사 및 정비창 그러고 현업 기관으로 구성하되, 사업본부는 철도업무의 핵심 기능별로 영업, 시설, 건설, 차량 및 사업개발본부로 구분하며, 현재의 지방청 및 현업소속도 본부별로 재편할 계획입 0 사업본부간에는 경영성과 및 책임의 영확회를 위해 내부거래시스댐을 도입하여 상호견제와 선의의 경쟁의식을 제고시키고자 함 O 한편, 경영평가시스템을 활성화하여 부문별 성과중 부진사항에 대한 원인분석과 사후대책 수립에 활용하며, 평가의 결과에 따라 인센티브 브를 제공할 것임 0 위와같은 개편체제를 통하여 구성원들의 성과개선 의식을 함양하고, 기반이 구축된 후 중장기적으로는 외주화, 자회사화등을 통한 가벼운 조직을 추구할 것임 0 포한, 업무전산화.자동화등 운영시스댐을 정비하고, 미래의 성장 목표언 비전을 명확히 제시하여 의식 및 업무수행 스타일의 개혁을 유도하며, 철도가 생활.문화.정보의 Center로서 역할을 수행할 수 있는 철도문화를 개발.창조하고자 함

• Proceedings of the KSR Conference
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• 2010.06a
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• pp.371-379
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• 2010

Since Kyoto Protocol to the United Nations Framework Convention on Climate Change in 2005 takes effect, the transportation policies of most countries move toward encouraging the use of the transit mode with energy efficient and low carbon. Korea is 8th country of producing Co2 emissions and will be one of obligation countries decreasing Co2 after year 2013. In order to improve the efficiency of national transport system investment, this study developed the strategies toward rail-oriented transport system by considering operational speed and accessability, rail-oriented development, and introduce of ubiquitous technique in railway. The four major strategies targeted for future year are introduced here such as One-hour rail(connecting major cities within one hour), Seamless 30(accessing major railway stations within 30 minutes, Rail urbanism (railway-based urban planning), and U-rail (railway service with ubiquitous technique). Each strategy includes several action plans and their priorities are investigated using AHP(Analytic Hierarchy Process) to organize them by time scheme as short, mid, and long term perspective.

• Journal of Navigation and Port Research
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• v.46 no.1
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• pp.33-41
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• 2022

An important operational goal of a container terminal is to maximize the efficiency of the operation of quay cranes (QCs) that load and/or unload containers onto and from vessels. While the maximization of the efficiency of the QC operation requires minimizing the delay of yard tractors (YT) that transport containers between the storage yard and QCs, the delay is often inevitable because of traffic congestion. In this paper, we propose a method for learning a model that predicts traffic speed in a terminal using only YT operation data, even though the YT traffic is mixed with that of external trucks. Without any information on external truck traffic, we could still make a reasonable traffic forecast because the YT operation data contains information on the YT routes in the near future. The results of simulation experiments showed that the model learned by the proposed method could predict traffic speed with significant accuracy.

• Journal of Korean Society of Transportation
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• v.25 no.2 s.95
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• pp.7-15
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• 2007

The accuracy of a Video Image Detector (VID) is gradually reduced due to various environmental and mechanical factors. However, there has been no systematic research about the decrease of VID accuracy. To maintain a proper level of VID accuracy for advanced traffic management, a regular VID calibration process needs to be introduced. However, the calibration cannot be performed frequently because of the cost. In this study, the researchers collected field data for accuracy estimation and inferred an accuracy decreasing function by using regression and considering the heteroscedasticity problem. Using the invented data collection equipment which was used for checking adaptability, some data in the field were collected and analyzed. Although the data were limited, the results are promising. More data need to be investigated in the future and this study will help to maintain the data quality for broad utilization of the data in ITS centers.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.43 no.5
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• pp.651-657
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• 2023

Railroad alignment improvements and operating speed increase occupy considerable portion in recent railroad market. Developing countries have limitations to construction of new high speed railroads due to the burden of budgets and the lack of demands, and the projects of operating speed increase arepracticallyrecommended. Thisstudy developed the methodologyto provide the railroad alignment design alternatives and the costs by upgrading the "Intelligent Railroad Alignment Design Program (ei-Rail)" which has been used to obtain the alignment plans and construction costs for railroad construction projects. The program provides the cost for alignment improvement, design drafts and the effects of operating speed increase with the input of target improvement speed and the prevailing railroad alignment on the numerical map. It is then expected for the ei-Rail program to be used for the supporting tool for the railroad alignment improvement projects.

• Journal of Korean Society of Transportation
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• v.32 no.5
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• pp.431-440
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• 2014

According to the State Safety Program (SSP) of the International Civil Aviation Organization (ICAO), it is essential to establish and manage Safety Performance Indicators (SPIs) which are used for monitoring the safety performance to achieve the national aviation safety goal. There have been enormous efforts to develop the framework of SPIs by considering the current status for each country. In case of Republic of Korea, however, there has been limited research and policy projects related to the framework for SPIs. Furthermore, Korea has used identical SPIs since the SSP was legislated in 2008. With this background, this research is, as part of strategy for the state level of SPI development, the study cases of advanced aviation countries for SPI development plans, such as the European Aviation Safety Agency (EASA) of the EU, the Civil Aviation Authority (CAA) of the UK, the Finish Transport Safety Agency (FTSA) of the Finland and the Federal Aviation Administration (FAA) of the U.S. The comparison between the foreign and domestic policies for SPI development strategies are provided in the conclusion of this study. The results and analyses of the case studies performed in this research will be helpful to provide some valuable development strategies for further SPI research in Korea.

• International Journal of Highway Engineering
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• v.14 no.3
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• pp.151-162
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• 2012

It is not surprising to hear news about irresistible natural disasters all over the world due to climate change. Korean Government has focused on developing a variety of green technologies to reduce green house gasses, in particular, carbon dioxide. This study suggested 18 technology divisions for achieving green highway technology development in six different sub-sectors considering life-cycle of roadway and surveyed 29 highway and/or transportation professionals of three institutes using AHP(Analytical Hierarchy Process) analysis to construct "Green Highway"and realize carbon emission reductions and energy use efficiency in a road sector in Korea. Expert Choice Software was used to rank 18 technology divisions weighted by two-level choices. Transport Operating Infrastructure Improvement, Roadway Policy Implementation, Green Transportation(such as Pedestrian and Bicycle) were highly ranked by respondents according to results of the AHP modeling. Among the 18 divisions, technology policy for supporting R&D investments from development to commercialization was ranked as the most significant one to be focused. Green Transportation Facility Design/Construction/Operation and Eco-Friendly Roadway Plan were followed as expected since professionals have thought that the planning/design step of the life-cycle is a starting point to reduce carbon dioxide from roads more and more. Additionally, comparing the results with the Government investment trend 2006-2011 for the roads, it can be interpreted that the Government should invest to the R&D area more widely than before to promote element and core technology development for Green Highway Construction. Above all, small and mid-sized businesses have to be invested as well as encouraged to undertake green highwayrelated objects to accomplish the divisions which ranked high.