• Journal of the Korean Society for Railway
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• v.12 no.6
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• pp.936-943
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• 2009

In this study, a risk assessment model based on the ETA (Event Tree Analysis) and FTA (Fault Tree Analysis) is developed according to the procedure of hazard analysis and risk assessment in order to estimate the risk quantitatively. The FTA technique is applied to estimate the branch probability (frequency) and the ETA technique is applied to estimate the consequence for each branch path on the ET (Event Tree). A risk assessment model is developed by the combination of those ETA and FTA. In addition, the reliability and the validity of the risk assessment model are verified by comparing the risk estimated through the developed model with the actual equivalent fatality.

• Journal of the Korean Society for Railway
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• v.8 no.4
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• pp.385-390
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• 2005

In Korea, about 60 percent of railroad accidents are associated with highway-rail grade crossings numbering 1,657 nationwide, which the railroad system operates. To reduce the number of accidents, the authority formulated methods to improve or eliminate grade crossings. However, the improvement programs have made progress in slow time due to the institute inertia and the lack of funds from the municipal government, which shares the cost of improvement of grade crossings. Thus, this study analyses the institute system of the grade crossings, proposes modifications, and suggests financing methods to improve the grade crossings and to lower the number of accidents. Presently, the grade crossings safety perspective is directed towards road conditions and so a new perspective, which includes safety from the train perspective and to finance in review of railway system and to allocate the cost between the central government and the municipal governments. is discussed.

• Proceedings of the KSR Conference
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• 2006.05b
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• pp.11-20
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• 2006

• Proceedings of the KSR Conference
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• 2004.06a
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• pp.254-261
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• 2004

Recently because of high-speed operation of trains, railway crossings become more and more hazardous components among the whole ones of railway system. It is desirable to remove all the railway crossings for reducing fatalities at railway crossings. it is impossible to eliminate all the crossings for unrealistic investment, so it should be considered to construct multi-level crossings by the order of priority. In this paper operation conditions, various hazard factors on the train accident at domestic railway crossings and foreign cases of risk-based safety assessment models are reviewed and then necessary record data that be added and modified, some essential considerations for developing railway crossing safety assessment software program are proposed.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.24 no.1
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• pp.160-166
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• 2010

Railroad level crossing systems are used to prevent train from collisions by informing pedestrians and vehicles of approaching trains on the level crossing. The current detection systems mostly use track-based electrical circuits to detect approaching trains. The making and breaking of the circuit when the train wheel passes along the track sends a signal to barriers that restrict access to the track. Unfortunately, this track-based signal system is vulnerable to malfunctions in certain situations. If the rail becomes rusted due to moisture, weather conditions, or infrequent use, the electrical circuit detection system could fail. Such a failure could lead to a train-vehicle or train-pedestrian collision. This paper suggests a replacement of the electrical circuit-based system with an infrared detection system. The research shows that an infrared detection system improves safety by reducing the frequency of detection failure of the alarming circuit to system.

• 한국ITS학회:학술대회논문집
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• 2002.11a
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• pp.43-46
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• 2002

• Magazine of the Korean Society of Hazard Mitigation
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• v.10 no.2
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• pp.24-28
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• 2010

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1285-1290
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• 2004

Crossing is the place which train, car and pedestrian adjoin, and the weak place. Also, crash accident between train and large size car is possible to be serious. So, various crossing obstacle detection device was developed, and it contribute to reduce the crossing accident.

• The Journal of the Korea institute of electronic communication sciences
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• v.5 no.2
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• pp.138-144
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• 2010

This paper presents the experimental analysis of a F-Hessian SIFT-Based Railroad Level-Crossing Safety Vision System. Region of surveillance, region of interests, data matching based on extracting feature points has been examined under the laboratory condition by the model rig on a small scale. Real-time system were observed by using SIFT based on F-Hessian feature tracking method and other common algorithm.

• The Journal of the Convergence on Culture Technology
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• v.5 no.2
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• pp.355-360
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• 2019

In this study, the structural stability of the railway level crossing system using rubber panel for high speed lines was investigated by applying the specification for wind load conditions (Train gust) of high speed train (300km/h and 360km/h). A finite element analysis using three-dimensional modeling was carried out by applying the field conditions that was installed with the complicated configuration of the rubber plate panel system. As a result of this study, the structural stability of the rubber plate panel system for high speed train gust was analytically verified.