• Journal of Korean Society of Transportation
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• v.23 no.8 s.86
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• pp.129-138
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• 2005

Since Successive introduction of BMS(Bus Management System) into the local governments has been able to collect each bus data on the road and valuate the bus operation by the quantitative index not qualitative index. we need a study on punctuality index for evaluation of service level for bus operation using bus location information. We propose punctuality index for bus operation using time-space diagram and valuate the index by application to real bus data.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.502-504
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• 2004

지능형 교통 정보 시스템을 구축할 때 반드시 요구되는 것이 바로 위치 정보이다. 대부분 GPS (Global Positioning System)와 같은 장치를 이용하여 위치 정보를 얻게 된다. 그러나 GPS수신기와 같은 장치는 상대적으로 비용이 크기 때문에 차량마다 장착하여 지능형 교통 정보 시스템에 활용하기에는 부담이 된다. 따라서 본 논문에서는 기존의 무선랜으로 위치를 추적하는 방법을 버스 지능형 교통 정보 시스템에 적용한 시스템 구조를 제안한다. 버스는 노선의 자유도가 택시 같은 다른 교통편에 비해서 작으므로 무선랜으로 위치 추적하는 방법은 다른 위치 추적 방법에 비해 경제적으로 보다 적합하다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.473-474
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• 2021

일반적으로 대학교에서 제공하는 통학버스 애플리케이션은 버스의 위치나 도착시각 같은 정보를 제공해주기 위해서 GPS 수신기와 같은 추가 장비를 설치해야 하는 비용 문제로 인해 버스 시간표, 노선도 등 단편적인 정보만을 제공해주고 있다. 본 논문에서는 이에 대한 해결방안으로 실시간 도로 교통 정보가 반영된 네이버 길 찾기 API를 사용하여 버스 도착시각을 학생들에게 제공해주는 통학버스 애플리케이션을 설계한다. 현재 단편적인 정보만을 제공해주는 대학교 통학버스 애플리케이션에 도입된다면 대학교 학생들의 통학버스 이용의 질을 향상할 수 있을 것이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2021.05a
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• pp.338-339
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• 2021

본 논문에서는 제주시에서 오픈데이터로 공개한 버스탑승 기록을 기반으로 이용도가 높은 버스노선에 대해 특정정류장에서의 도착시간 예측모델을 구축한다. 버스들의 평균주행 속도, 운행시간대, 교통량 등을 입력으로 한 모델을 Sklearn을 이용하여 생성하고 MAE와 손실율 등의 성능을 분석한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.229-230
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• 2021

본 논문에서는 안드로이드 스마트 폰의 Bluetooth 센서와 Open API 기반의 저상 버스 예약 애플리케이션을 설계하고 구현한다. 이 애플리케이션은 Bluetooth 센서를 이용하여 Beacon과 단방향 통신을 통해 사용자의 위치를 기준으로 반경 50m 안의 버스정류장을 확인할 수 있고, Open API를 통해 확인된 버스정류장을 경유하는 노선별 저상 버스 정보를 확인할 수 있도록 구현한다. 그리고 저상 버스 탑승 예약 기능과 버스 기사가 예약자를 확인할 수 있는 기능을 구현한다.

• The Journal of the Korea Contents Association
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• v.13 no.8
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• pp.458-465
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• 2013

The purpose of this research is possible to reduce cost of management and maintenance to realization of smartphone and using data server network technology instead of GPS. Former wireless bus information system was focused on supply side management structure and national spread thus it needs to establish GPS terminal, Windows CE, Window XP embedded and LCD panels which provide only one way communication of information of public traffic information. Therefore, former system management and maintenance cost are very expansive. This research is not use GPS terminal and other hardware equipment but design and realization using smartphone and data network server. This system also provides low cost of management and maintenance. It is not only service downtown area but also out of town and small and medium-sized cities. This system functionally gets a satisfying result user convenience and satisfaction using function of set-up route map, real-time display, and running statically analysis.

• Spatial Information Research
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• v.22 no.5
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• pp.65-75
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• 2014

Bus headway plays an important role not only in determining the passenger waiting time and bus service quality, but also in influencing the bus operation cost and passenger demand. Previous research on headway control has considered only an hourly difference in the distribution of ridership between peak and non-peak hours. However, this approach is too simple to help manage ridership demand fluctuations in a short time scale; thus passengers' waiting cost will be generated when ridership demand exceeds the supply of bus services. Moreover, bus ridership demand varies by station location and traffic situation. To address this concern, we propose a headway control algorithm for minimizing the waiting time cost by using Smart Card data. We also provide proof of the convergence of the algorithm to the desired headway allocation using a set of preconditions of political waiting time guarantees and available fleet constraints. For model verification, the data from the No. 143 bus line in Seoul were used. The results show that the total savings in cost totaled approximately 600,000 won per day when we apply the time-value cost of waiting time. Thus, we can expect that cost savings will be more pronounced when the algorithm is applied to larger systems.

• Journal of KIISE:Databases
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• v.33 no.7
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• pp.655-667
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• 2006

Due to the rapid development in mobile communication technologies, the usage of mobile devices such as cellular phones and PDAs becomes increasingly popular. One of the best ways to maximize the usability of mobile devices is to make them aware of their current locations and the locations of other fixed and mobile objects. In this paper, we propose a cost-effective Bus Information System, ACE-BIS, which utilizes a mobile device to retrieve the bus routes to reach a destination from the current location. To accomplish this task, ACE-BIS maintains a small amount of information on bus stops and bus routes in a mobile device and runs a heuristic routing algorithm based on such information. When a user asks more accurate route information or calls for a 'leave later query', ACE-BIS entrusts the task to a server into which real-time traffic and bus location information is being collected. By separating the roles into a mobile device and a server, ACE-BIS is able to provide bus routes at the lowest cost for wireless communications, without imposing much burden to a server. The results of extensive experiments revealed that ACE-BIS is effective and scalable in most experimental settings.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.16 no.6
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• pp.112-123
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• 2017

The accurate forecasting of the public transportation's transit and arrival time has become increasingly important as more people use buses and subways instead of personal vehicles under the government's public transportation promotion policy. Using bus management system (BMS) data, which provide information on the real-time bus location, operation interval, and operation history, it is now possible to analyze the bus schedule reliability. However, the punctuality should always be considered together with the operation safety. Therefore, this study suggests a new methodology to secure both reliability and safety using the BMS data. Unlike other studies, we calculated the bus travel time between two bus stops by dividing the total travel length into 6 sections using 5 different measuring points. In addition, the optimal travel time for each bus route was proposed by analyzing the mean, standard deviation and coefficient of variation of the each section's measurement. This will ensure the reliability, safety and mobility of the bus operation.

• Journal of Korean Society of Transportation
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• v.20 no.1
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• pp.7-18
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• 2002

To activate public transportation service, Bucheon City built Bus Information System based on Beacon type, and operates it for no.22 line. This research analyzes an effect of BIS operations, and mainly it analyzes far reliability evaluation of bus arrival time information and passenger satisfaction about BIS. As results of reliability evaluation of arrival time information service, it is proven to be practically inappropriate to use as arrival time data because it is not only travel time between each bus stop but also previous travel time history data. In order to improve this matter, neural network model was evaluated as the most outstanding one as result of experiment in applying current arrival time Prediction model. This research cannot help limiting for evaluation of operation effect in Bucheon City because there is no Bus Information System based on GPS type in Korea. For the future ITS model city, in the case of building ITS model city based on GPS type, it is possible to compare two systems relatively. In addition to that, fur the consideration of reliability of bus arrival time information, it is required to develop Predictable model and research factors that affect to bus operation.