• The Journal of the Korea Contents Association
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• v.21 no.12
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• pp.302-309
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• 2021

The section speed enforcement system measures the starting instantaneous speed, the The section speed enforcement system measures the starting instantaneous speed, the ending instantaneous speed, and the section average speed, and imposes fines only for the portion that has been speeding the most. However, according to the Road Traffic Act, most of the systems are installed on highways, so existing research has been conducted on highway sections. In this study, it is expected that the installation of section speed enforcement systems on general national roads will be expanded according to the revision of related laws. ITS collection and operation data targeting the section speed enforcement system installed on National Road 3 Seongnam Icheon-ro was used to analyze traffic speed, standard deviation of traffic speed, and reduction in traffic accidents by dividing it into before installation, trial operation period, and after crackdown. As a result of the analysis, the traffic speed, standard deviation, and traffic accidents decreased by 13%, 25%, and 70%, respectively, after installation, confirming that the installation of the section speed enforcement system greatly contributed to the reduction of accidents.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.4
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• pp.48-62
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• 2023

Recently, smart intersections have been installed in many intelligent transportation system projects, but few cases use them for traffic signal operations besides traffic volume collection and statistical analysis. In order to respond to chronic traffic congestion, it is necessary to implement efficient signal operations using data collected from smart intersections. Therefore, this study establishes a procedure for operating a real-time traffic signal control algorithm using smart intersection data for efficient traffic signal operations and improving the existing algorithm. Effect analysis confirmed that intersection delays are reduced and the section speed improves when the offset is adjusted.

• Journal of Korean Society of Transportation
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• v.22 no.2 s.73
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• pp.165-175
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• 2004

본 고는 대전광역시 첨단교통모델도시 건설사업의 일환으로 구축된 DSRC(Dedicated Short Range Communication) 기술을 활용한 교통정보시스템 구축 사례를 소개함을 목적으로 한다. 공공부문에서의 구간정보 수집 및 가공 체계 구축은 본 대전 ITS 사업이 처음이며 더욱이 DSRC 기술을 구간정보 수집에 적용한 최초의 시도이다. 이에 시스템 구축과정에서 적지 않은 쟁점이 도출되었고, 많은 시행착오를 통해 그 해법을 찾아가며 현재 운영중인 시스템을 완공하게 되었다. 노변기지국(RSE)과 차량장치(OBE)간의 통신에 의해 수집된 자료는, 필터링, 검지기 지점정보, 패턴데이터 등과의 자료합성, 평활화, 통계정보 및 패턴정보 생성 등의 과정을 거쳐 구간소통정보가 산출된다. 현재 운영중인 본 시스템은 향후 지속적으로 보완 발전시켜 나가야 하며, 이를 위해 프로브 수집체계 보완, 시스템의 성능평가, 패턴데이터의 적절한 유지관리, 알고리즘의 지속적 발전 등을 향후과제로서 제시하였다. 본 고는 ITS사업에 있어 중요 쟁점중에 한 분야인 소통정보의 가공 절차를 공유함으로써, 관련 분야의 기술개발 촉진과 향후 유사시스템 구축의 시행착오를 줄이는데 기여할 수 있으리라 판단된다.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.7 no.4
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• pp.13-24
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• 2008

Real-time traffic data are readily obtainable by traffic surveillance systems of intelligent transportation systems (ITS). Such data greatly support further applications in the field of traffic operations, planning, and safety. However, traffic data should be appropriately processed to fully exploit the benefits of data collection capability. Rather than developing individual data processing techniques, which is major concern of existing studies, this study proposes a novel methodology for evaluating data processing techniques in an integrated manner. Also, a tool for implementing the proposed methodology is developed. Users can extract useful and more reliable traffic data based upon their ultimate purpose of data usage by the evaluation tool developed in this study. Actual freeway traffic data are, as an example, fed into the evaluation tool, and results are discussed.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.31 no.2
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• pp.53-70
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• 2020

This study was intended to present the need for building the library as a hub of the community memory preservation which provides the collection, sharing, and curation services of the locality specific historical and local data based on the policy task, namely supporting the collection, preservation, and management system of the community's life memory. To this end, the current status of data collection, management, and operation of institutions serving regional-based materials such as cultural centers and regional archives was grasped, and the cases and status of curation services in libraries were investigated and analyzed. The discussion proposed via the results of the study are as follows. First, to the culture center, external demand has been increased from the aspect of social education including festivals, cultural and art event, cultural and art educational business, art activities business of local residents and managerial business is to be carried out, which makes it difficult for the culture center to manage its businesses. Accordingly, it is necessary to collect and preserve regional various data at the pubic libraries playing various roles including provision of informative services, cultural programs and information sharing places to local residents and provision of services to vulnerable social group. As the existing libraries have a plan to collect data systematically, it is considered that those libraries will smoothly operate the data management through cooperation with existing culture centers and various cultural organizations. Second, it appears that a plan will be needed to set up all the data including the ones owned by libraries, local administrative agencies, individuals and other competent agencies in online database so that they are easily available to the public and always available in the libraries because there are a lot of data which cannot be moved to other place and it is actually difficult to concentrate and set up all the data to those libraries.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.15 no.2
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• pp.141-159
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• 2004

This paper investigated the introduction background, the role a nd the functioning of the CADIST which is operated in France in order to emphasize the necessity of characterization of academic libraries. The objective of this policy is to collect and to diffuse scientific and technical information, and to establish its sharing system. The result of the policy shows that the sharing system is brought an activation of research and a discrimination or characterization of universities. And the discrimination and characterization of academic libraries is played an important role in area industry.

• Journal of Korean Library and Information Science Society
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• v.45 no.4
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• pp.45-65
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• 2014

The purpose of this research is to examine the characteristics and current status of OASIS, a web archive, developed and operated by the National Library of Korea. From December 2013 to November 2014, an analysis of a numerical growth and subject distribution of 55,581 websites archived at OASIS shows many problems in quality, including an overwhelming proportion of 'Social Science' and its subclass 'Politics', consequential lack of balance in subject distribution, lack of authority or scholarly value of some contents, unclear application of selection criteria for personal creators/publishers, and inaccurate and overlapping statistics. Despite an impressive growth in quantity, immediate improvement of selection policies and quality control is needed.

• 한국ITS학회:학술대회논문집
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• v.2007 no.10
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• pp.196-201
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• 2007

현재 국내 ITS는 현장장비 유지관리에 대한 연구 및 고장관련 DB가 부족하여 예비부품수 및 교체시기 산정에 대한 규정이 없는 실정이다. 이에 본 연구는 실제 고장이력자료를 갖고 신뢰성 분석을 실시하여 단거리전용통신(DSRC)방식 노변기지국(RSE)의 예비부품수 및 교체시기를 산정하였다. 전체 수집기간동안의 고장자료는 욕조곡선의 형상을 나타내어 우발고장기간의 자료로 신뢰성 분석을 실시하였으나 고장 수명 분포 중 적합되는 분포가 없었다. 따라서, i)장비가동률과 ii)경험적(empirical) 누적분포함수(CDF) 곡선을 이용한 장비의 고장률(건/일)을 감안하여 예비부품수를 산정한 결과 16.22개 이상의 노변기지국(완제품)을 확보하여야 하는 것으로 분석되었다. 하자보수기간(2년)이 지난후 일정기간($2{\sim}3$년)이 지난 시점에서 향후 10년간에 대하여 수리하면서 사용하는 경우와 신품구입시의 총비용을 비교하여 산정한 교체시기는 10.67건/40개월 이상이다. 본 연구 수행결과 첫째, 비모수적 방법으로 적합도 검정을 실시하지 못하였다는 한계와, 둘째, 초기에 고장이 많이 발생하는 장비는 향후에도 고장이 많이 발생한다는 가정에 기반하여 향후 10년의 운영비용을 분석하였으나 이러한 가정을 입증하지는 못하였다. 따라서, 향후엔 본 연구에 사용된 자료가 고장 수명분포도 적합 되지 않은 원인을 분석하는 것과 분석대상 기간 이후의 자료를 추가하여 적합도 검정 및 신뢰성 분석을 실시하는 것이 필요하다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.4D
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• pp.459-465
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• 2009

u-T (ubiquitous transportation) environment can be envisioned as an advanced version of ITS environment and be expected to provide more advanced transportation service in a ubiquitous manner. As a basic necessity to measure traffic flow in both environments, a flow estimation method was proposed. Flows have been measured in existing ITS and in a new u-T environments and some differences were investigated using simulation technique. In the interrupted traffic situation, the flow rate of u-T is 3.58% higher than that in ITS environment. Both MARE and MAE, which were used as measure of effectiveness, in u-T were better since the results are 31.4% and 31.1% lower than in ITS, respectively. Besides the equality coefficient in u-T was 1.9% higher than that in ITS. Such being the case, the flow rate measured in u-T using U-TSN is more reliable and can be expected to be successfully used for transportation system design or traffic operation areas.

• Journal of Korean Society of Transportation
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• v.24 no.7 s.93
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• pp.27-40
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• 2006

The traffic information is provided, which based on the volume of traffic, speed, occupancy collected through the currently operating Vehicle Detector System(VDS). In addition to the trend in utilization fold of traffic information is increasing gradually with the applied various fields and users. Missing data in Vehicle detector data means series of data transmitted to controller without specific property. The missing data does not have a data property, so excluded at the whole data Process Hence, increasing ratio of missing data in VDS data inflicts unreliable representation of actual traffic situation. This study presented the imputation process due out which applied the methodologies that utilized adjacent stations reference and historical data utilize about missing data. Applied imputation process methodologies to VDS data or SeoHaeAn/Kyongbu Expressway, currently operation VDS, after processes at missing data ratio of an option. Imputation process held presented to per lane-30seconds-period, and morning/afternoon/daily time scope ranges classified, and analyzed an error of imputed data preparing for actual data. The analysis results, an low error occurred relatively in the results of the imputation process way that utilized a historical data compare with adjacent stations reference methods.