• Title/Summary/Keyword: Transportation

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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.

Intelligent Transportation Systems and Intermodal Transportation Information System for Railroad (교통시스템 정보화와 철도중심의 연계교통정보시스템)

  • 남두희;이진선
    • Journal of the Korean Society for Railway
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    • v.6 no.1
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    • pp.73-79
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    • 2003
  • The Korean high speed railroad is scheduled to open in 2004. For railroad-based integrated transfer system, it is essential to develop the intermodal information system for easy transfer to other travel modes. The understanding of mode choices by KTX passengers is crucial for the intermodal transportation planning. Recent development of Intelligent Transportation Systems(ITS) made it possible for railroad users to access the transportation information in a cabin or waiting areas at the station. Development of intermodal transportation information system will influence the relative demand for traveling by train from competing other transportation modes. The research is focused on a general overview of the ITS with an emphasis on intermodal transportation information system.

The Changes in Transportation Expenditure Patterns of Urban Households During 1985-1998 (도시가계의 교통비 지출 변화 : 1985-1998)

  • 전윤숙;이희숙
    • Journal of the Korean Home Economics Association
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    • v.38 no.1
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    • pp.139-154
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    • 2000
  • The purpose of this study was to identify the changes in transportation expenditure patterns of urban households during 1985-19o8. The data were drawn from 'Annual Report on the family Income and Expenditure Survey' by National Statistical Office, Republic of Korea. For data analysis, frequency, percentile, mean, and multiple regression analysis were utilized by the SAS window program. The results of this study were as follows; Frist, the levels of public transportation expenditure showed increasing trend, whereas the portions of public transportation expenditure have showed decreasing trend during 1985-1998. And both the level and the portion of private transportation expenditure showed increasing trends during 1985-1998. Second, the marginal propensities to consume of public transportation have decreased, whereas the marginal propensities to consume of private transportation have increased during 1985-1998. Third, income elasticities of public transportation showed decreasing trend during 1985-1998, impling that consumers have less demand public transportation with increasing income. And income elasticities of private transportation showed increasing trend till 1993, and then showed decreasing trend till 1998, impling that consumers have perceived the car as one of necessary goods rather than luxury goods gradually since 1993.

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Determination of the Transportation Cycle Time and the Vehicle Size in a Distribution System (물류시스템에서 수송주기와 차량크기의 결정)

  • Chang Suk-Hwa
    • Journal of the Society of Korea Industrial and Systems Engineering
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    • v.27 no.4
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    • pp.23-32
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    • 2004
  • This paper addresses a model for the transportation planning that determines the transportation cycle time and the vehicle size to minimize the cost in a distribution system. The vehicle routing to minimize the transportation distance of the vehicles is also determined. A distribution system is consisted of a distribution center and many retailers. Products are transported from distribution center to retailers according to transportation planning. A model is assumed that the time horizon is continuous and infinite, and the demand of retailers is constant and deterministic. Cost factors are the transportation cost and the inventory cost, which the transportation cost is proportional to the transportation distance of vehicle when products are transported from distribution center to retailers, and the inventory cost is proportional to inventory amounts of retailers. A transportation cycle time and a vehicle size are selected among respective finite alternatives. The problem is analyzed, and a illustrative example is shown.

Issues and Roles of the Transportation Technology under the Ubiquitous Computing (유비쿼터스 컴퓨팅 환경에서 교통기술의 이슈와 역할)

  • Lee, Chungwon;Byun, Wanhee
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.26 no.2D
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    • pp.259-263
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    • 2006
  • As the concept of Ubiquitous Computing has become an important issue, we need to have a voice in the field of Transportation. Ubiquitous Computing means that IT network based on realization of 5 Any(Anytime, Anywhere, Anything, Anynetwork, Anydevice) is deeply penetrated into our daily life. As ITS has developed with the aid of IT and Transportation Technology together, we need to discuss u-Transportation concept with Ubiquitous Computing and Transportation Technology. According to the recent papers and studies, Transportation or Transportation Information sector is mentioned as a major application of Ubiquitous Computing. However, most of the studies are limited to the basic concept without any in-depth understanding about Transportation. This paper present the implementation of u-Transportation and the role of Transportation Technology based on recent technology trend.

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Development of the Postal Transportation Network Simulation System (우편운송망 성능평가를 위한 시뮬레이션 시스템 개발)

  • Park, Sang-Yong;Lee, Tae-Han;Choi, Ji-Young;Lee, Suk
    • IE interfaces
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    • v.18 no.4
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    • pp.454-464
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    • 2005
  • In Postal logistics, the efficient design and operation of transportation network is very important issue. But, it is hard to operate the postal transportation network flexibly according to the change of mail volume. In Korea post, a transportation plan is pre-determined and the transportation of mail is performed through the routes in the plan. When the routes cannot transport all mail, temporary vehicles are used. In the postal transportation, it is important to make a good transportation plan and to manage the plan efficiently. But the change of transportation plan is not a simple work because hundreds of vehicles and persons are related to the plan. So, a methodology to check the effect of the change of the transportation plan in advance is required. In this paper, we develop a simulation model to evaluate the performance of a postal transportation plan. We implement the simulation model and develop an information system including user interface for managing data and simulation results. We apply our simulation model and system to the real change of transportation plan.

The Development Trend of Transportation Information System through Transportation Card Data (교통카드자료를 활용한 교통정보시스템 발전 방향)

  • Kim, Se-Won;Sohn, Moo-Sung;Min, Jae-Hong;Oh, Seog-Mun
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.1835-1847
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    • 2011
  • After conducting demonstration of transportation card for bus from Godeok-dong to Sangil-dong in 1996, due to continuously support for public transportation, the transportation card utilization of metropolitan public transportation passengers is currently going beyond 90%. In the current situation, transportation information system is mainly focused on road operation and control, offer of real time information and research of transportation information system using transportation card data which is differentiated by previous transportation information system is needed to study. This paper compare and analyze transportation information system, which is being used to each country, based on foreign examples of activating use of transportation card then introduce figure of advanced transportation information system which provide decision making feature for improving policy and institution of public transportation based on transportation card data, scientific analysis of passenger information, information of demand forecasting, variation and so on for constructing new route.

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Exploration on Reform of Railway Transportation Management System Based on Separating Train Operation with Rail Equipment Management

  • Yu, Jie-Min
    • Proceedings of the KOR-KST Conference
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    • 1998.09a
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    • pp.36-42
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    • 1998
  • This article analyzes Chinese railways transportation management system, uses the experiences of other countries' railway transportation management system for reference, as well as discusses the necessity of reform of railway transportation management system based on separating train operation with rail equipment management. Moreover, the article also puts forward an imagination on the reform scheme of railway transportation management system based on separating train operation with rail equipment management.

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A Network Capacity Model for Multimodal Freight Transportation Systems

  • Park, Min-Young;Kim, Yong-Jin
    • Journal of Korea Port Economic Association
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    • v.22 no.1
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    • pp.175-198
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    • 2006
  • This paper presents a network capacity model that can be used as an analytical tool for strategic planning and resource allocation for multimodal transportation systems. In the context of freight transportation, the multimodal network capacity problem (MNCP) is formulated as a mathematical model of nonlinear bi-level optimization problem. Given network configuration and freight demand for multiple origin-destination pairs, the MNCP model is designed to determine the maximum flow that the network can accommodate. To solve the MNCP, a heuristic solution algorithm is developed on the basis of a linear approximation method. A hypothetical exercise shows that the MNCP model and solution algorithm can be successfully implemented and applied to not only estimate the capacity of multimodal network, but also to identify the capacity gaps over all individual facilities in the network, including intermodal facilities. Transportation agencies and planners would benefit from the MNCP model in identifying investment priorities and thus developing sustainable transportation systems in a manner that considers all feasible modes as well as low-cost capacity improvements.

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Prospects of the TKR-TSR Market

  • Yoo Ju-Young;Nam Ki-Chan;Son Sung-Il
    • Journal of Navigation and Port Research
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    • v.29 no.9
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    • pp.795-800
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    • 2005
  • Nowadays, road transportation which has played a key role in the market of both passenger and freight transportation is facing with a serious problem, the traffic congestion causing a delay of transportation. Therefore, railroad transportation is considered as an attractive alternative mode of inland transportation due to its inherent merits in mass transportation such as relatively low cost compared with road transportations, less air pollution and noise than other mode ets. In this paper, therefore, we examine the current situation of railroad transportation markets including TKR(Trans- Korean Railway}, TSR(Trans-Siberian Railway} and prospects for the connection of TKR-TSR. And then we examine the structure of the container transportation market by railroad in Korea with a brief analysis of the traffic volume of TKR-TSR.