• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.9 no.6
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• pp.13-21
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• 2010

Road Traffic Authority and National Police Agency is currently managing the "development of an integrated metropolitan traffic information infrastructure" that installs of facilities for a traffic information infrastructures, such as Local Traffic Information Center, UTIS(Urban Traffic Information System), CCTV, VMS and etc. CTIC was established in 2005 to act as an traffic information hub and to provide integrated UTIS traffic information without regional barriers. This study was carried out to seek for solution to improve quality of UTIS traffic information service for the Central Traffic Information Center(CTIC). In this study, the Evaluation index for UTIS traffic information service was developed and the implementation plan was established by using requirement analysis method, case study and AHP(Analytic Hierarchy Process) technique. The Evaluation index consist of 5 fields and 20 index, it make possible evaluation of direct/indirect effect for UTIS traffic information service. In conclusion, It is expected that quality of UTIS traffic information service will be improved by using developed evaluation index and also can be applied for performance evaluation of other traffic information systems.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.6
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• pp.118-133
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• 2020

Research interest in the Mobility-as-a-Service (MaaS) concept for enhancing users' mobility experience is increasing. In particular, dynamic pricing techniques based on reinforcement learning have emerged since adjusting prices based on the demand is expected to help mobility services, such as taxi and car-sharing services, to gain more profit. This paper provides a simulation framework that considers more practical factors, such as demand density per location, preferred prices, the distance between users and drivers, and distance to the destination that critically affect the probability of matching between the users and the mobility service providers (e.g., drivers). The aforementioned new practical features are reflected on a data structure referred to as the Matching Matrix. Using an efficient algorithm of computing the probability of matching between the users and drivers and given a set of precisely identified high-demand locations using HDBSCAN, this study developed a better reward function that can gear the reinforcement learning process towards finding more realistic dynamic pricing policies.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.4 no.1 s.6
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• pp.1-13
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• 2005

For integrated transit networks operated with diverse transit modes, it is difficult to find related literatures on the provision of multiple travel time routes information. This study proposes a methodology on how to select K number of least time transit routes in the integrated transit network with two modes, bus and subway. In the Proposed method, three constraints usually (will be) encountered for decision by users-(1) service time constraints of travel modes, (2) maximum payment fare constraints under the integrated distance based fare system, and (3) maximum number of transfer constraints - are taken into consideration in the searched routes. The experimental studies shows that the proposed method properly provides K number of least time routes. In addition, it somehow proves that by combinatorially considering three constraints the proposed method can be evaluated as to enlarge the quality as well as the diversity of route information demanded by users.

• Journal of Korean Society of Transportation
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• v.35 no.2
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• pp.91-104
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• 2017

In this study, we discuss the modeling of domestic transport sector using GCAM(Global Change Assessment Model). The GCAM is one of integrated assessment models widely used in internationally modeling community, and applied for the evaluation of IPCC 5th Report. Nevertheless, it is noted that there are a considerable number of problems in its application to domestic transport sector. First, the base year information of GCAM for detailed transportation service demand is found not consistent with national statistics. Second, the transportation sector simulation results do not properly reflect the past trends of service demand. Thus, the base year service demand is carefully matched with the detailed national statistics. In addition, the existing models were checked and modified so that the simulation results of service demand can accurately reflect past trends of national statistics. As a result, it is reported in detail how the current GCAM simulation results are corrected and how the trend of past transportation sector service demands is properly reflected. This study is expected to be useful as a basic tool for future scenario analysis for transportation policy, technology evaluation and greenhouse gas reduction measures.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.126-129
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• 2015

Device-to-device (D2D) communications, a subset of Proximity-based Services that enables direct communication between LTE network subscribers, is gaining popularity. It is well underway to be adopted in cellular communication systems for pedestrian and connected-vehicles alike. In this paper, we briefly present our model of an Evolved Packet Core Network-assisted device discovery simulator and show the applicability of Proximity-based Services for Vehicular Ad-hoc Networks. Through the performance evaluation based on the developed simulation environment, it is shown that in case when users gather in the same vicinity, as in public transportation, LTE network data can be efficiently offloaded and multicasted through Wi-Fi for e.g. delivering traffic-related information and for the benefit of infotainment service consumers.

• Journal of Advanced Navigation Technology
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• v.27 no.6
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• pp.699-709
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• 2023

As the global air traffic volume has shown a rapid increase, doubling every 15 years since 1977, domestic and international air traffic control services and air navigation safety facility operation management system and status review It is necessary to present the feasibility of establishing an air traffic control agency with integrated functions and establish an operating system for an independent dedicated agency to provide advanced air traffic control services in preparation for the future air transport environment. In particular, in 2021, the national ATM reformation and enhancement (NARAE) a customized comprehensive plan for operations, facilities, and systems to handle air traffic safely and efficiently by actively reflecting changes in the navigation environment such as international policies and standards as this is established, the role of the air traffic control agency becomes more important, and an improved action plan for the control and navigation operating system must be promoted.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.4D
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• pp.533-538
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• 2008

The introduction of KTX (Korea Train Express) has brought an historic change to the overall transit system in Korea. The high-speed railway stations in particular are expanding the scope as public transit centers. However, it is evident that the evaluation on the high-speed railway stations had not been performed successfully thus far. The most important element of the evaluation is the connectivity of the departure point to the arriving stations and also the internal transfer service stations. We developed the service evaluation indicators of transfer facilities in the high-speed railway stations. The indicators are comprised of the level of service (LOS), the propriety of allocation, and the quality of information throughout the facilities in the centers. We examined the 7 stations in Korea that are currently in operation and standardized the methodology of the evaluation process by applying the indicators suggested in this study.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.577-580
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• 2018

지난 몇 년간 우리는 소셜 검색에 몰두하여 연관검색 및 소비자의 만족을 위해 빅데이터 분석을 하였다. 최근에는 빅데이터 분석이라는 흐름에 맞춰 기업 및 기관별 본연의 정보를 통합하여 효율적인 검색을 할 수 있도록 하는 솔루션을 대거 도입하고 있다. 또한 기업 및 기관에서 가지고 있는 정보는 기존 비정형 데이터로 방대하여 기존의 방법이나 도구로 수집 및 저장 분석이 어려운 실정이다. 이에 공공기관 및 민간기업 등에서는 키워드 중심의 다양한 검색엔진을 개발하거나 도입하고 있으며, 정보 분류의 확대, 메타데이터의 활용, 태그정보의 제공, 개인 맞춤형 서비스 등 고객의 만족도를 제고하기 위한 다양한 방법을 시도하고 있다. 본 연구에서는 기관의 교통 연구와 관련한 일련의 작업 중 행정문서, 연구정보, 유관기관 게시물 등의 통합 빅데이터를 가지고 검색시스템을 구현하였다. 이와 더불어 사용자 사전 및 동의어 사전을 통한 검색 키워드를 데이터베이스에 저장하여 검색 효율성을 제고하는 방안을 제시한다.

• Electronics and Telecommunications Trends
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• v.27 no.1
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• pp.147-157
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• 2012

스마트카는 차량 내 정보를 통합 관리하고, 운전자가 차 안에서 오락, 정보 등 다양한 콘텐츠를 즐길 수 있는 차로 스마트폰 등 모바일 기기와 이동통신 기술을 자동차에 접목하여 편의성을 높이고 고객의 니즈에 부응하는 차세대 자동차이다. 교통사고를 획기적으로 줄이고 사고 피해를 최소화해주며, 자동차 주행을 효과적으로 할 수 있게 해 환경 오염도 줄일 수 있다. 본고에서는 차세대 자동차로 부상하고 있는 스마트카의 기술동향 및 국내외 자동차 업체들의 서비스 현황을 분석하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.167-171
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• 2007

텔레매틱스 서비스는 크게 주변 지역 관심 정보, 날씨, 근접 정비소, 현금 자동인출기 등의 정보서비스 분야와 교통정보 서비스, 네비게이션 서비스, 응급서비스, 고장 서비스 및 차량수리 및 차량문제에 관한 진단서비스를 중심으로 서비스가 개발되고 있다. 혹은 두 가지 분야가 복합적으로 개발되고 있다. 또한 텔레매틱스 시장은 여러 가지 기술들이 독립적으로 분할되어 다양한 제품으로 정보를 제공하기 보다는 여러 정보 및 기능 등이 텔레매틱스 시스템으로 집중 및 통합되는 형태가 요구된다. 이에 본 논문에서는 차량 장치 정보를 열람하고 제어하기 위한 단말 미들웨어 모델을 제시/구현하고, 단말 미들웨어를 이용하는 텔레매틱스 서비스 배포를 위한 배포 모델을 제시하고자 한다.