• 한국ITS학회:학술대회논문집
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• 2003.11a
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• pp.40-43
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• 2003

• 한국ITS학회:학술대회논문집
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• 2003.11a
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• pp.159-164
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• 2003

• The Korean Journal of Applied Statistics
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• v.16 no.2
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• pp.203-215
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• 2003

In order to provide the drivers with more reliable transportation information in NHTMS(National Highway Transportation Management System), it is important to estimate the expected passage time by using the traffic volume and speed. In this study, we analyze the characteristics of the traffic volume in the national highway and we investigate two real-time adjustment methods: the average adjustment method and the auto-regressive adjustment method. In addition, we compare them using the real data collected at the National Highway Route 3 in 2000.

• 한국ITS학회:학술대회논문집
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• 2003.11a
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• pp.234-240
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• 2003

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1048-1049
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• 2008

인구 및 차량 증가에 따라 날로 심각해지는 교통문제를 해결하기 위해서는 도로를 건설하는 방법만으로는 한계가 있음을 인식하여 새로운 도로의 건설보다는 도로의 교통효율을 높이고 안전성을 확보하는 것이 더욱 중요한 문제로 대두됨에 따라 저비용 고효율의 교통관리방안인 지능형교통체계(ITS)를 추진하였다. 이에 국가기간망인 국도의 ITS 구성과 차량검지기(VDS), 차량번호인식장비(AVI), 폐쇄회로텔레비전(CCTV), 도로전광표지(VMS) 등 주요장비의 구성을 통한 국도 ITS를 이해하고, 국도 ITS 구축 현황 및 계획, 그 효과를 살펴보고 비전을 제시함으로서 향후 추진해야할 개선방안을 제안하였다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.2 no.2 s.3
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• pp.55-64
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• 2003

This research is about executing the suitability evaluation of the data through wireless communication system in comparison with the data through the wire system used in National Highway Traffic Management System. The communication system for the evaluation was established on Peoyngteak-Anjung section(about 19 Km) at Route 38 in southern National Highway of the National Capital region where image detectors with the communication by wire were set up. In the situation, the comparison of the data transmission rates between the wire system and the proposed system was accomplished. Before we evaluate the possibility of application about the proposed system, the elements of wireless systems performed the spot investigations. Traffic data transmission test among the equipments was accomplished on the section of the Route 38 where wireless communication equipments were set up. And then, the test of traffic data transmission between the field equipment and the data collective center of wireless communication system was carried out. It evaluated the reliability of wireless communication data for the suitability evaluation of cable/wireless data collected while 73 days.

• Journal of Korean Society of Transportation
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• v.19 no.6
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• pp.7-17
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• 2001

The purpose of this paper is to develop automatic incident detection algorithm using image based detector in freeway management system. This algorithm was developed by using neutral network for high speed roadway and by using speed and occupancy variable for low speed roadway. The image detector system with the developed automatic incident detection algorithm can detect multi-lane as well as several detect areas for each lane. To evaluate this system, field tests to measure the detecting rate of incidents were performed with other systems which have APID and DES algorithm at high speed roadway(freeway) and low speed roadway(national arterial). As the results of field test, it found that the detect rate of this system was highest rate comparing to other two systems.

• Proceedings of the KIEE Conference
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• 1998.07b
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• pp.769-771
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• 1998

본 논문에서는 지방국도에 시설되고 있는 교통 정보 제공시스템의 운전 상태를 감시하여 보수와 함께 유지관리를 수행하기 위한 종합 보수지원 시스템을 구현한다. 제안된 시스템은 국도상에 불규칙하게 설치되는 차량검지 시스템을 계층 집중형 감시시스템으로 디자인하여 실시간 감시와 함께 발생되는 운전 이력과 정보를 활용하여 유지보수 체계의 온라인화를 실혐하였다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.3 no.2 s.5
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• pp.129-140
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• 2004

In this paper, we conduct the research about optimal aggregation interval of travel time data on interrupted traffic flow and verify the reliability of AVI collected data by using car plate matching method in RTMS for systematic collection and analysis of link travel time data on interrupted traffic flow rural arterial. We perform Kolmosorov-Smirnov test on AVT collected sample data and on entire population data, and conclude that the sample data does not represent pure random sampling and hence includes sample collection error. We suggest that additional review is necessary to investigate the effectiveness of AVI collected sample data as link representative data. We also develop statistical model by applying two estimation techniques namely point estimation and interval estimation for calculating optimal aggregation interval. We have implemented our model and determine that point estimate is preferable over interval estimate for exactly selecting and deciding optimal aggregation interval. Our final conclusion is that 5-minute aggregation interval is optimal to estimate travel time in RTMS, as is currently being used our investigation is based on AVI data collected from Yang-ji to Yong-in $42^{nd}$ National road.

• The Journal of Engineering Geology
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• v.23 no.3
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• pp.257-269
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• 2013

Prevention plans for landslide and slope disasters should be appropriate for a country's budget when considering a systematic investment plan. The systematic management of slopes adjacent to national highways should incorporate reasonable investment risk and the expected degree of damage should be calculated by considering the investment priorities. In terms of priority of investment, the major factors used to determine the degree of hazard are gradient, soil characteristics, RMR (Rock Mass Rating), stability interpretation, type of discontinuities, and history of collapse, among others. The likely consequences of slope failure can be determined by considering traffic volume, the number of lanes, and average vehicle risk. We performed such calculations regarding the priority of investment and performed a regression analysis for 392 slopes located in Yeongseo region, Gangwon province. The calculation results show that collapsed slopes have a higher priority for investment, as do slopes with a high proportion of dangerous sections and locations in valleys.