• Journal of Biosystems Engineering
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• 제33권3호
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• pp.151-156
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• 2008

This study was conducted to evaluate ride vibrations experienced by tractor operators during plowing, rotovating, and transporting operations in Korea. Field data of ride vibrations were taken at the operator-seat interface from 49 tractors and analyzed on the basis of ISO 2631-1 and EU Directive 2002/44. Of the measured ride vibrations 15.4% in the plowing and 12.5% in farm road transport exceeded the 8-hour fatigue decreased proficiency boundary in the fore and aft directions at frequencies from 1 to 5 Hz. 93.9% exceeded the 8-hour potential health risk of ISO 2631-1. The ride vibrations exceeding the 8-hour exposure limit were 38.5% in plowing, 31.6% in rotovating, 100% in farm road transport and 88.9% in concrete road transport. Although most tractor operators were not exposed to ride vibrations greater than the 8-hour exposure limit value (ELV) of EU Directive 2002/44, 7.7% of the operators in the plowing experienced greater vibrations than the ELV in the fore-aft direction. Farm road transport produced greater vibrations than any other operations. Concrete road transport, plowing and rotovating operations followed next. Limit criteria for ride vibration exposure differ depending upon the guidelines. Exposure limit of the health guidance caution zone of ISO 2631-1 is lowest among its kinds.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 추계학술대회 논문집
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• pp.1671-1676
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• 2004

This thesis watches for the present condition of both economic exchange and goods transport between South and North Korea focused on material side as a provision for the railway connection between them. This is also a predicting thesis for a smooth goods transport in case of setting up a goods transport system between south and North Korea predicting transport demand for the connection of a railway and road studying fundamental facilities and transport related laws.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 춘계학술대회 논문집
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• pp.190-195
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• 2003

This thesis watches for the present condition of both economic exchange and goods transport between South and North Korea focused on material side as a provision for the railway connection between them. This is also a predicting thesis for a smooth goods transport in case of setting up a goords transport system between south and North Korea predicting transport demand for the connection of a railway and road studying fundamental facilities and transport related laws.

• 한국항만경제학회:학술대회논문집
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• 한국항만경제학회 2006년도 국제학술대회
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• pp.103-124
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• 2006

This paper is concerned with a comparative study on the economic effects upon the Korean economy by transport mode, ie road, rail, air, and coastal and inland water transportation between 1990 and 2000, using input-output analysis. The economic effects consist of backward and forward linkage effects, production inducing and import-inducing effects. The data employed for this study come from the Bank of Korea database for Input-Output structure of the Korean economy. The major findings in this study are, among others:(1) the power of dispersion(=backward linkage effect) of coastal and inland water transportation sector is the highest among the four transport sectors, while road cargo transport mode showed the highest the degree of sensitivity (=forward linkage effect); (2) rail cargo transport recorded the highest production inducing effects; and (3) air transport mode achieved the highest ranking in the import-inducing effects.

• 무역학회지
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• 제47권2호
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• pp.175-193
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• 2022

This study analyzes the effects of road transportation networks on the local economy in korea. The analysis methods are SNA and spatial panel regression model. The subjects of this study are inland areas of Korea, and the research period is from 2010 to 2019. The network analysis showed that the connection centrality of Gyeongg-do was high internally and externally. Gyeonggi-do has played a central role in the domestic road freight transportation industry. The results of spatial panel regression analysis showed that there was economic competition between regions. Domestic road transportation industry has been competitive among regions and has economic ripple effect. And Internal cargo has been shown to boost the economy of the region. But internal cargo has been shown to lower the economy of surrounding regions, but external cargo has been shown to increase the economy. In order to revitalize the local economy, it is necessary to increase road cargo.

• 한국산학기술학회논문지
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• 제17권9호
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• pp.94-101
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• 2016

전 세계적으로 환경에 대한 관심이 높아짐에 따라 세계 각국은 도로중심의 운송체계를 철도 등 친환경 교통체계로 전환하고자 하는 움직임이 증가하고 있다. 우리나라도 도로화물수송의 철도전환을 도모하고자 하고 있으나 실질적인 노력은 부족한 상황이다. 화물철도와 같은 친환경 수송수단에 대한 지원정책 마련을 위해 무엇보다 필요한 것이 바로 도로대비 철도의 친환경성에 대한 정량적 자료이나 이에 대한 연구는 부족한 상황이다. 따라서 본 연구에서는 철도와 도로의 화물수송시 배출되는 환경오염물질 및 온실가스 배출 원단위를 산정하고 이의 비교검토를 진행함으로써 철도화물의 친환경성을 제시하였다. 특히 디젤기관차와 전기기관차의 대기오염물질 및 온실가스 배출량이 상이하므로 이를 구분하여 산정함으로써 보다 현실적인 친환경성 비교분석을 수행하였다. 분석결과 도로화물의 단위수송 당 대기오염물질 배출량이 SO2를 제외하고는 철도보다 7~15배 가량 높은 것을 확인할 수 있었다. 또한 온실가스의 경우 도로화물이 철도대비 약 4배 수준의 온실가스를 배출하는 것을 확인할 수 있었다.

• Nuclear Engineering and Technology
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• 제54권11호
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• pp.4030-4048
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• 2022

In this study, road transportation tests were conducted with surrogate fuel assemblies under normal conditions of transport to evaluate the vibration and shock load characteristics of spent nuclear fuel (SNF). The overall test data analysis was conducted based on the measured acceleration and strain data obtained from the speed bump, lane-change, deceleration, obstacle avoidance, and circular tests. Furthermore, representative shock response spectrums and power spectral densities of each test mode were acquired. Amplification or attenuation characteristics were investigated according to the load transfer path. The load attenuated significantly as it transferred from the trailer to the cask. By contrast, the load amplified as it transferred from the cask to the surrogate SNF assembly. The fuel loading location on the cask disk assembly did not exhibit a significant influence on the strain measured from the fuel rods. The principal strain was in the vertical direction, and relatively large strain values were obtained in spans with large spacing between spacer grids. The influence of the lateral location of fuel rods was also investigated. The fuel rods located at the side exhibited relatively large strain values than those located at the center. Based on the strain data obtained from the test results, a hypothetical road transportation scenario was established. A fatigue evaluation of the SNF rod was performed based on this scenario. The evaluation results indicate that no fatigue damage occurred on the fuel rods.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.2455-2462
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• 2008

Global warming has become one of the most important social responsibilities. After Kyoto protocol for greenhouse gas reduction by climatic change convention came into effect, developed countries are presenting various policies to reduce greenhouse gas that is produced in transport field. One of those policies is modal shift that change from road freight to sea, inland waterway and railway transportation that is eco-friendly. Because increase of road freight brings about road congestion and accident, logistics cost, air pollution and green house gases. Railways are superior to all other modes of transport in mass transportability, high speed, timeliness, safety and environmental-friendliness, but the railway industry has been pushed behind in competition. In developed country's government actively promoted relevant legislation, policies, and countermeasures known as modal shift policies to shift freight transport from road to large volume mode such as railway and ship. In this paper, we discuss the current situation in modal shift, compare it with cases in other countries EU and Japan, identify problems in Korea, and propose the following ways to enhance competitiveness of rail freight.

• 한국ITS학회 논문지
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• 제17권3호
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• pp.18-31
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• 2018

도로를 주행하는 위험물질 수송차량 사고는 재난형태의 심각한 피해를 야기하므로 해외국가들은 이미 오래전부터 위험물질 수송차량의 안전관리를 위하여 관련 법 제도를 구축하고 체계적인 관리를 수행해오고 있다. 최근 국내에는 인제양양터널, 금정산터널 등 10km이상의 초 장대터널이 고속도로 상에 개통되고 있으며, 화학기술의 발전과 함께 다양한 종류의 위험물질 유통량이 증가하고 있다. 그러나 위험물질 수송차량 안전운행과 관련된 법 제도는 여전히 부재하며, 이들을 관리하기 위한 체계적인 정책방안도 구체화되지 않은 실정이다. 위험물질 수송차량의 사고위험성을 인식하고, 도로관리자를 위한 체계적 관리방안을 구축하여 도로 안전성을 확보하는 것은 중요한 과제이다. 따라서 본 연구는 안전한 고속도로 위험물질 수송차량 운행을 위하여 국내 고속도로 터널통행규제에 대한 타당성을 분석함으로써 도로관리자를 위한 관리 방향을 제시하고자 하였다. 본 연구의 결과는 향후 도로 위험물질 수송차량 관련 법 개정과 위험물질수송차량 최적경로 도출을 위한 기초자료로 활용될 수 있을 것이다.

• 로봇학회논문지
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• 제6권2호
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• pp.182-188
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• 2011

This paper describes a method of road tracking by using a vision and laser with extracting road boundary (road lane and curb) for navigation of intelligent transport robot in structured road environments. Road boundary information plays a major role in developing such intelligent robot. For global navigation, we use a global positioning system achieved by means of a global planner and local navigation accomplished with recognizing road lane and curb which is road boundary on the road and estimating the location of lane and curb from the current robot with EKF(Extended Kalman Filter) algorithm in the road assumed that it has prior information. The complete system has been tested on the electronic vehicles which is equipped with cameras, lasers, GPS. Experimental results are presented to demonstrate the effectiveness of the combined laser and vision system by our approach for detecting the curb of road and lane boundary detection.