• Proceedings of the ESK Conference
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• 1995.10a
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• pp.201-207
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• 1995

ITS는 자동차, 운전자, 도로, 교통제어 시스템을 첨단 통신, 전자, 컴퓨터기술 등으로 묶는 종합 교통자동화 체계이다. 차세대 교통 시스템인 ITS는 교통혼잡을 덜고, 사고를 줄이며, 오염을 줄이고, 에너지를 더욱 효율적으로 이용하는 등의 결과를 가져올 것으로 기대되고 있다. 선진 각국에서는 ITS(Intelligent Transportation Systems; 미국), ATT(Advanced Transport Telemetics; 유럽), SSVS(Super Smart Vehicle Systems; 일본)등의 이름으로 막대한 예산을 투입 하여 ITS의 실현을 위한 연구 및 인프라 구축 중이며, 우리 나라에서도 사회간접자본 투자기획단 ( SOC)을 통해 기획중이고 정부 5개 부처 공동으로 추진될 예정이며, G7과제 후보로 올라 있다. 인간공학은 ITS실현을 위한 주요 요소기술로 인식되고 있다. ITS는 궁극적으로 운전자의 workload 를 덜어줄 것으로 예상되지만, user-oriented된 인터페이스의 설계가 뒷바침되지 않으면, 과부하, 혼동, 사고 등으로 이어져 ITS의 정착에 심각한 장해요인으로 작용할 것이다. 본 논문에서는 미국의 ITS를 중심으로 그 sub-systems들과 그에 해당하는 인간공학적 고려사항들 그리고 ITS초기 단계에서 시급히 풀어나가야 할 인간공학적 과제에 대하여 논의하고자 한다.

• Journal of ILASS-Korea
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• v.27 no.3
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• pp.155-160
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• 2022

Recently, major developed countries have strengthened automobile fuel efficiency regulations and carbon dioxide emission allowance standards to curb climate change caused by global warming worldwide. Accordingly, research and manufacturing on electric vehicles that do not emit pollutants during actual driving on the road are being conducted. Several automobile companies are producing and testing electric vehicles to commercialize them, but it takes a lot of manpower and time to test and evaluate mass-produced electric vehicles with driving mileage of more than 300km on a per-charge. Therefore, in order to reduce this, a simulation model was developed in this study. This study used vehicle information and MCT speed profile of small electric vehicle as basic data. It was developed by applying Simulink, which models the system in a block diagram method using MATLAB software. Based on the vehicle dynamics, the simulation model consisted of major components of electric vehicles such as motor, battery, wheel/tire, brake, and acceleration. Through the development model, the amount of change in battery SOC and the mileage during driving were calculated. For verification, battery SOC data and vehicle speed data were compared and analyzed using CAN communication during the chassis dynamometer test. In addition, the reliability of the simulation model was confirmed through an analysis of the correlation between the result data and the data acquired through CAN communication.

• Journal of Korean Society of Transportation
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• v.23 no.2
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• pp.83-92
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• 2005

We try to evaluate the stock level of Korean transportation infrastructure comparing Korean SOC stock level with those of OECD countries. In order to do so, we work on indices to show the transportation infrastructure stock levels of various countries. Among several indices, we select the effective road-extension rate per population density and the effective railroad-extension rate per population density corresponding to road and railroad. We compare Korean road and railroad stock levels with those of OECD countries, to make use of the effective road-extension rate per population density and effective railroad-extension rate per population density. We choose the Britain, Greece, Portugal, and Sweden to compare Korea because their sizes of population and territory are similar to those of Korea. Using International comparison, we arrive at the conclusion that Korean road and railroad stock levels are 63.4% and 53.2% of those of four countries respectively. In addition, we estimate the target level of road and railroad stocks and compute the target level of investments in road and railroad based on the result.

• Journal of the Korea Convergence Society
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• v.13 no.5
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• pp.1-8
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• 2022

In Korea, drones, which are at the core of the 4th industrial revolution, are used to promote Korean New Deal policies to digitalize the SOC. Overseas, the use of convergence sensors, such as thermal imaging cameras, on drones is increasing in various industrial fields. In this research, to improve pavement quality in highway bridge pavement construction, a thermal imaging camera was mounted on a drone to measure and verify the temperature of the pavement work section. Using a laser thermometer allows the partial measurement of pavement temperature. It was confirmed that the proposed method allows not only real-time temperature monitoring of the whole pavement work section but also uniformity verification by checking temperature distribution. The proposed method has the potential to control highway pavement quality and enable quick decision-making on traffic opening times by reducing the possibility of misjudging road opening times(pavement surface temperature ≦ 40℃).

• Transactions of the Korean hydrogen and new energy society
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• v.30 no.5
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• pp.385-394
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• 2019

The analysis of temperature behavior of a hydrogen tank during refueling is of significance to clarify the safety of the compressed hydrogen storage in vehicles since the temperature at a tank rises with inflow of hydrogen. A mass balance and an energy balance were combined to obtain analytical model for temperature change during the hydrogen refueling. The equation was coupled to Peng-Robinson-Gasem (PRG) equation of state (EOS) for hydrogen. The PRG EOS was adopted after comparison with other four different cubic EOSs. A parameter of the model was determined to fit data from experiments of various inlet flow rates and temperatures. The temperature and pressure change with refueling time were obtained by the developed model. The calculation results revealed that the extent of precooling was more effective than the flow rate control.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.1D
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• pp.71-80
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• 2012

Metropolitan transport demand has increased in Seoul Metropolitan Area (SMA) due to the expansion of its role and land use. Various public transport modes have to be supplied to relieve road congestions for the convenience of users. During the constructions of theses infrastructures some conflicts between the central government and local governments arise for sharing financial resources. In this study finance sharing criteria is developed for the metropolitan BRT, transfer facility, and public garages. Finally, a case study has been done for the metropolitan BRT between Cheongra and Hwagok area in SMA.

• Journal of the Economic Geographical Society of Korea
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• v.7 no.2
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• pp.329-343
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• 2004

The Social Overhead Capital contains roads, railroad system, airports, seaport, waterworks, electric power plants, and etc. This SOC is very important, not only as a national economic competitiveness factor, but also as a national security factor. For example, 'Freedom Express Way' works as a tool of psychological warfare to the North Korea, as well as an economics infrastructure. In spite of that, until now on, we have disregarded the SOC as a national security factor. Constructing the SOC, only considering economic cost, we have not fulfilled other purpose requirement like stable national security, balanced development. When we invest the money to construct the SOC, considering multi-purpose requirement like military purpose, economic purpose, social purpose and cultural purpose, as a whole national wide point of view, the scares national resources and government budgets will be saved.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.15 no.3
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• pp.131-136
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• 2015

The feasibility study is an evaluation and analysis of the potential of a proposed project. It is based on extensive investigation and research to support the process of decision making. A systematic approach to determining the optimum use of scarce resources, involving comparison of two or more alternatives in achieving a specific objective under the given assumptions and constraints. Economic analysis takes into account the opportunity costs of resources employed and attempts to measure in monetary terms the private and social costs and benefits of a project to the community or economy. Cost-benefit analysis (CBA), sometimes called benefit-cost analysis (BCA), is a systematic approach to estimating the strengths and weaknesses of alternatives that satisfy transactions, activities or functional requirements for a business. It is a technique that is used to determine options that provide the best approach for the adoption and practice in terms of benefits in labor, time and cost savings etc. The CBA is also defined as a systematic process for calculating and comparing benefits and costs of a project, decision or government policy and projects.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.32 no.1
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• pp.79-90
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• 2024

UAM is emerging due to the deepening population concentration in the metropolitan area and the problem of congested ground transportation in urban areas. Accordingly, along with research on eVTOL aircraft for UAM services, interest in vertiport, the interest in vertiports, the infrastructure that allows eVTOLs to take off and land, is also increasing. However, behind the concentration of population in the metropolitan area, aphenomenon of local extinction is occurring in conjunction with the aging population. AAM, which moves quickly through 3D space, can be an effective SOC facility in times of local extinction crisis. In this paper, we introduce a design plan from the perspective of a complex transper center for a regional hub-level vertiport that can connect with local high-speed rail and utilize local airports in compliance with the vertiport design guidelines issued by FAA(Federal Aviation Administration) and EASA(European union Aviation Safety Agency). We would like to present Vertiport's future operation plan.

• Journal of Korean Society of Transportation
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• v.30 no.2
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• pp.53-65
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• 2012

This study was performed to investigate the currents status of the sexual assaults on women public transportation users and to provide solutions in order to provide safe transportation services to women. Data was collected through in-depth interviews with career women in Gyeonggi-do. The main purpose of the interview was to understand their experiences about sexual assaults while using public transport and to investigate the extent to which their experiences affected their transportation-related behaviors. The effects of various related transport policies on women behaviors were also analyzed by estimating structural equation models. The results showed that among them, CCTV, accessible warning bells, and more police presence seemed to be more effective, but that woman-only sections were not as effective as others in reducing the number of crimes. The results implied that individual subjective norms and their perceived behavioral control, behavior intention were important factors. Based on these results, we recommended additional policies more effective in sexual crime reduction.