• Journal of Korean Society of Transportation
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• v.3 no.1
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• pp.46-57
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• 1985

The objective of this paper is to derive a optimum distance and time taxi fare structure based on social costs. Social costs expressed in terms of congestion and vehicle operating costs were successfully internalized. Speed and volume data for three major arterials in Seoul CBD were used. Optimum congestion charge turned out to be 97.01 Won/Km which can be regarded as congestion tax in the context of Seoul CBD. This congestion tax can possibly be incorporated into time-based taxi fare structure. Congestion is likely to be reduced as a result of imposition of time-based taxi fare which reflects social costs.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.266-268
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• 2011

부표(등부표)는 항로를 표시하거나 항해상의 위험물을 표시하는 중요한 해상교통안전시설이다. 현재 부표(등부표)의 표체가 철재로 되어 있기 때문에 해중 생물에 의한 표체 오손도가 높고, 무거운 표체 중량으로 인하여 설치 이설 보수 등의 어려움이 있다. 또 철재 표체는 선박과의 충돌에 의한 손상이 발생하며 보수 유지에 따른 많은 비용이 소요된다. 이에 이 연구에서는 선박과의 충돌에도 손상이 거의 없고, 가벼워 취급하기 용이하며 아울러 보수유지가 거의 필요 없는 폴리에텔렌폼과 폴리우레탄 소재의 표체의 개발 내용을 제시한다.

• Journal of the Korean Professional Engineers Association
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• v.37 no.2
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• pp.42-46
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• 2004

고속철도 건설의 필요성 서울-부산간 교통난 심화, 경부축; 인구 71%, GDP 75% 집중, 과중한 물류비용으로 국가경쟁력 악화 (GDP 대비: 일본 -9.5%, 미국 -9.9%, 한국 -16.3%), 새로운 교통시설 확충에 대한 국민적 요구 증대, 건설비는 고속도로에 비해 1.5배가 증가하나 수송력 2배, 운행시간 2-3시간 단축 효과, 우리나라는 수송밀도가 매우 높아 수송문제를 해결하기 위해서는 속도향상이 필수적임(속도=수송력 증가), 고속철도 ; 여객전용, 기존선 철도 ; 화물중심으로 운행(중략)

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.3
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• pp.26-30
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• 2004

LED교통신호등은 기존 전구식 신호등과 달리 필라맨트 발열부가 없고, 전구식에 사용하는 착색렌즈 사용이 없어 이에 따른 빛 손실이 매우 적으며, 전구식 신호등에 비해 90% 정도의 전력이 절약된다. 또 특정 파장대의 단색광을 발광하며, 소자의 특성상 전원 공급과 동시에 빛을 발광한다. 그러면서 긴 수명으로 인하여 유지보수비용의 절감이 이루어지고, 구조적으로 매우 견고한 특성을 가지고 있다. (중략)

• Journal of the Korean Society for Railway
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• v.5 no.4
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• pp.10-15
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• 2002

1974년에 서울지하철 1호선이 개통된 이래, 지하철은 대도시의 교통난 해소에 중추적인 역할을 하고 있으며, 현재에도 많은 지하철건설이 계획되고 있다. 그러나 지하철 건설에 소요되는 막대한 예산과 공공교통이라는 명분에 의한 이용요금의 경직성 때문에 발생되는 운영비용의 적자로 인해서, 보다 경제적이고 효율적인 새로운 도시철도의 도입을 고려하게 되었으며 그 대안으로 경량전철시스템 도입이 적극 추진되기에 이르렀다. (중략)

• Journal of the Korean Society for Railway
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• v.5 no.4
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• pp.45-58
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• 2002

우리사회는 교통시설부족으로 인하여 많은 사회적 비용을 지불하고 있다. 이에 따라 꾸준한 지하철, 도로등 교통시설을 확대하고 있으나 지하철과 도로망 확대 모두 재원 문제로 많은 어려움을 겪고 있다. 따라서 지하철보다는 수송용량은 떨어지나 건설비 및 운영비를 절감 할 수 있고, 도로건설에 따른 도시에서의 용지 확보문제를 동시해결 할 수 있는 경량전철이 계속 심도있게 부각되고 있다. 본 글은 우리 철도학회 회원들에게 경량전철의 개황과 현재 운영 또는 개발되어 있는 각종 시스템을 소개함으로서 경량전철을 이해하는데 도움을 주고자하여 이글을 기고합니다.

• Journal of Korean Society of Transportation
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• v.26 no.3
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• pp.145-153
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• 2008

This study proposes a facility location model in consideration of spatial coverage and travel cost as an effort to make objective and effective decisions of natural gas filling stations. The proposed model is developed for fixed stations and consists of two stages. The first stage employs a heuristic algorithm to find a set of locations which satisfy the spatial coverage constraints determined by the maximum travel distance between the filling stations and bus depots. In the second stage, the optimal location of filling stations is determined based on the minimum travel cost estimated by using a modified transportation problem as well as the construction and maintenance costs of the filling stations. The applicability of the model is analyzed through finding the optimal location of filling stations for the city of Anyang, a typical medium-sized city in metropolitan Seoul, based on the demand of natural gas buses. This study is expected to help promote the spread of natural gas buses by providing a starting point of a objective and reasonable methodological perspective to address the filling station location problem.

• Journal of Korean Society of Transportation
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• v.31 no.2
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• pp.80-89
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• 2013

The purpose of this research is to optimize the line planning of the intercity passenger railway. In this study, the line planning problem has been formulated into a mixed integer programming by minimizing both user costs (passenger's total travel time) and operator costs (operation, maintenance and vehicle costs) with multiple train types. As a solution algorithm, the branch-and-bound method is used to solve this problem. The change of travel demand, train speed and the number of schedules have been tested through sensitivity analysis. The optimal stop-schedules and frequency as well as system split with respect to each train type have been found in the case study of Kyoung-bu railway line in Korea. The model and results of this research are useful to make a decision for railway operation strategy, to analyze the efficiency of new railway systems and to evaluate the social costs of users and operators.

• Journal of Korea Spatial Information System Society
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• v.6 no.2 s.12
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• pp.77-84
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• 2004

The purpose of this study is to suggest an effective guideline for reducing communication costs and improving qualities of Intelligent Transport Systems (ITS) by totally or partially integrating wireless communication networks between equipments of ITS Centers and Roadside in the National ITS Physical Architecture. We analyzed wire and wireless communication networks such as wireless LAN and satellite communications in the National Highway Traffic Management System (NHTMS) for receiving and transmitting transportation data. Also, we analyzed operation and communication costs to find out right communication networks for ITS. The results of this study will be used to build and operate many other ITS systems including Korea Highway Corporation.

• Journal of Korean Society of Transportation
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• v.19 no.5
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• pp.109-117
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• 2001

The median encroachment accident model proposed in this paper is the first step to develop cost-effective criteria about installing facilities preventing traffic accidents by median encroachment. This model consists of expected annual number of median encroachment on roadway and conditional probability to collide with vehicles on opposite lane after encroachment. Expected encroachment number is related to traffic volume and quote from a study of Hutchinson & Kennedy(1966). The probability of vehicle collision is composed of assumed headway distribution of opposite directional vehicles (negative exponential distribution), driving time of encroaching vehicle and Gap & Gap acceptance model. By using expected accident number yielded from the presented model, it will be able to calculate the benefit of reduced accident and to analyze the cost of installing facilities. Therefore this will help develop cost-effective criteria of what, to install in the median.