• Title/Summary/Keyword: Transportation

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Regional Differentiation Effect of Transportation System (교통체계의 지역분화작용)

  • 이주영
    • Journal of Korean Society of Transportation
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    • v.3 no.1
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    • pp.76-85
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    • 1985
  • The significant role of transportation system for economic development process has been recognized, but the argument that transportation improvements stimulate economic development has brought sometimes no resonance in lacking of a plausible theory on the conditions and process of economic development by transportation investment. This paper reviews the theory on regional differentiation of transportation system and shows why and how the installation of a new transportation system or the improvements of the old transportation quality differentiate the spatial order of economic activities. It presents the interaction between the change of transportation quality with introducing of definition "transportation value" as tool of its determination and economic activities following the regional differentiation process, which result means regional defferentiation of niveau of economic development.

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A study on the trend of the rail transportation in view of the change of Korea public transportation (국내 육상교통 수단의 변천과정에서 본 철도고통의 발전방향)

  • 최출헌;한석윤;정종덕
    • Proceedings of the KSR Conference
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    • pp.94-99
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    • 2002
  • The traffic policy of a city in Korea has brought to many traffic problems by putting emphasis on the only side of mobility in the past that the personal transportation was put first in importance more than the public transportation. As the result of this policy, in the process that the traffic policy of large cities in Korea changes into accessibility, it is shown for re-lighting up the development of the public transportation to be going to be able to get many suggestions in searching for the desirable developing direction of the new means of transportation that will arrive at Korea in the future. Especially, compared with the policy of U.S.A. on the traffic plan that has concentrated on the road and the vehicle, and that of Europe that has put first in the walking and the public transportation system, it is considered as an important thing that the lesson is given to us about what is important for the desirable city development. Transportation can be divided into four; a railroad transportation. a road transportation, a marine transportation, and an aerial transportation.

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A driving power supply unit design of the track special vehicle considering the urban railway underground environment (도시철도 지하환경을 고려한 궤도특수차의 주행동력장치 설계 검토)

  • Lee, Jae-Bong;Na, Youn-Il;No, Kyung-Won;Seo, lL-Kwon;Lee, Hwan;Kim, Yang-Soo
    • Proceedings of the KIEE Conference
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    • pp.1571-1572
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    • 2015
  • 기존 궤도특수차는 디젤유를 사용하기 때문에 도시철도 지하환경을 오염시키고 유해한 배기가스가 인체에 악영향을 준다. 따라서 경제성이 우수한 친환경적인 하이브리드형 궤도특수차를 개발하기 위해 이에 따른 궤도특수차의 주행동력장치에 대한 설계조건을 규명하고자 한다.

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study on the resistance of the transshipment of transport logistics according to the mode choice - focus of cement (물류수송의 환적저항에 따른 수단선택 행태 변화 - 양회 중심으로)

  • Lee, Won-Tae;Kim, Sung-Eun;Kim, Si-Gon;Chung, Sung-Bong
    • Proceedings of the KSR Conference
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    • pp.1615-1622
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    • 2010
  • Recently, there has been an increase in interest from the aspects of transshipment and connection between the means of transportation. Not only for passengers but also for freight transportation as the need for transportation efficiency is growing while the importance of logistic railway transportation is emerging. The domestic freight transportation is carried out by roads, railroads, ships, and port. However, as other means of transportation, except road, is impossible for Door to Door Service, multimodal transportation accompanied by road transportation is carried out. Here, even though 'transshipment' occurs, because of the lack of basic data regarding this, it is difficult to reflect it in the demand forecasting. With respect to the Korean freight O-D, it was very difficult to have equivalent comparison on the competitiveness and availability of transportation services between the point of departure and the final destination. Taking into account the study of implementation of logit model considering the time and cost of transshipment of multimodal transportation and the transshipment resistance value upon selecting means of freight transportation on multimodal transportation was comparatively insufficient. This study consisted of questionnaire targeting shippers, and based on this, transshipment resistance value was calculated by deriving utility function. By doing so, I intend to examine the effect 'transshipment' has on selecting the means of transportation occurring from freight transportation.

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A Study on the Establishment of the Metropolitan Transportation Area (광역 교통권 설정에 관한 연구)

  • 박병호
    • Journal of Korean Society of Transportation
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    • v.8 no.2
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    • pp.55-66
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    • 1990
  • The research deals with the establishment of transportation areas in the metropolitan cities. The purpose is three-fold ; 1) to review the existing literature : 2) to analyze the commuting (work and school) pattern and interregional movement pattern of passengers and freights ; 3) to establish the metropolitan transportation area based on the above analyses. The transportation area is defined by the analysis of trip pattern to the center city of each metropolitan area. The detailed indices for establishment are selected by the rank-size and time-distance analyses. For the operational purpose, the study defines 3 different transportation areas as follows : the first transportation area means the directly effecting region of the center city ; the second means the region with many reverse trips and development potentials ; and the third means the indirectly effecting region. It can be concluded that the first transportation area includes 10 cities and 5 counties in Seoul metropol tan region, Yangdsan-Gun, Kimhae-Gun and Kimhae-Si in Busan, Dalsung-Gun, Chilgok-Gun and Kyungsan-Gun in Daegu, Hwasung-Gun and Raju-Gun in Kwangju, and Daeduk-Gun in Daejun. These results could be expected to have many implications for the establishment of area-wide public transportation network, the metropolitan transportation decision-making bodies and others.

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A Model of Dynamic Transportation Planning of the Distribution System Using Genetic Algorithm (유전 알고리듬을 이용한 물류시스템의 동적 수송계획 모형)

  • Chang Suk-Hwa
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.27 no.2
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    • pp.102-113
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    • 2004
  • This paper addresses the transportation planning that is based on genetic algorithm for determining transportation time and transportation amount of minimizing cost of distribution system. The vehicle routing of minimizing the transportation distance of vehicle is determined. A distribution system is consisted of a distribution center and many retailers. The model is assumed that the time horizon is discrete and finite, and the demand of retailers is dynamic and deterministic. Products are transported from distribution center to retailers according to transportation planning. Cost factors are the transportation cost and the inventory cost, which transportation cost is proportional to transportation distance of vehicle when products are transported from distribution center to retailers, and inventory cost is proportional to inventory amounts of retailers. Transportation time to retailers is represented as a genetic string. The encoding of the solutions into binary strings is presented, as well as the genetic operators used by the algorithm. A mathematical model is developed. Genetic algorithm procedure is suggested, and a illustrative example is shown to explain the procedure.

A Feasibility Study on the Economic Aspect of Sea Transportation System between Inchon and Youngjong Island (인천-영종 간 해상수송시스템 구축을 위한 경제적 타당성 분석)

  • Chun, Jae-Woo;Lee, Seung-Hee
    • Journal of Ocean Engineering and Technology
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    • v.13 no.3B
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    • pp.116-126
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    • 1999
  • The purpose of this study is to analyze the economic aspect of sea transportation system between Inchon and Youngjong island in which Inchon international airport is being constructed. Total demand of sea transportation arising from in the airport and Yongyu Muwi leisure complex was estimated. To select optimum transportation route, environmental conditions in and around Inchon harbour and Youngjong island including the change of water depth by tide current, fog, rain, wind adn typhoon, ets., were investigated. The preliminary consideration on ships (size, velocity, transport capacity, price), routes, operational modes, terminals and berthing facilities were carried out. The transportation cost per passenger by sea transportation system was estimated to compare with that of land transportation system. It was found that sea transportation system proposed is competitive to the transportation system.

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The Developing Economy and Urban Transportation

  • Li Junhao
    • Proceedings of the KOR-KST Conference
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    • pp.135-140
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    • 1998
  • Social and economic development needs the support of transportation and communications and in turn the development level of society and economy affects urban traffic demand and determines the investment scale of transportation facilities. In the paper based on the analysis of the evolution of urban transportation in Shanghai in the past ten years and the economic background of that period, the urban transportation in the future development of economy is generally prospected.

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The Development of Equalizing Spacer for Minimization of Voltage Drop according to DC Feeder Extension (직류 급전선 증설에 따른 전압강하 최소화를 위한 균압 스페이서 개발)

  • Lee, Jae-Bong;Seo, Il-Kwon;Na, Youn-Il;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.63 no.7
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    • pp.1013-1018
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    • 2014
  • This paper described the development of equalizing spacer for minimization of voltage drop according to DC feeder extension. Power consumption is increased as shorter interval of train driving time and transportation capacity increase in urban subway. Therefore we investigated voltage drop of catenary at a point in case of traction driving of a train in parallel to the DC power supply system. Based on it's result, equalizing spacer is designed and fabrication to minimize the voltage drop in accordance with the power supply line arranged in three rows, and then its performance was confirmed that the stress distribution of main body and the distributed load are satisfied through the body structure modeling.

Development of a Transportation Planning System for the Mail Transportation Network (우편운송망에서의 운송편 관리를 위한 교환/집중국망 상시조정시스템 개발)

  • Choi, Ji-Young;Kim, Wan-Seok;Park, Jong-Heung;Lee, Tae-Han
    • IE interfaces
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    • v.21 no.1
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    • pp.120-130
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    • 2008
  • In this paper, we develop a transportation planning system for the mail transportation network, which consists of 25 mail centers and one mail exchange center. The main functions of the system are adjustment of transportation plan, creation of new transportation plan, and calculation of expected exchange mail volume which are transported through mail exchange center. We develop an adjusting algorithm which gives a new transportation plan by deleting, adding or changing the current routes. The algorithm based on the transportation results of current transportation plan and mail volume data. We design and implement a planning system by installing the algorithm as the planning engine. For the practical use, the system is connected to the information system of Korea Post, PostNet.