• 디지털산업정보학회논문지
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• 제14권3호
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• pp.127-144
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• 2018

The differentiation of this study is largely based on the above discussion. First, I would like to examine the main factors that affect the image of the local government's special transport agencies in terms of users and suggest strategic options for promoting the local government's special traffic. Second, a public service approach is very necessary considering the concept of new public transport such as local government special transport, individual use experience and social impact. The purpose of this study is to demonstrate the characteristics of local government special traffic through the five important factors of the service quality which are not capable of objectively measuring the characteristics of the service.

• 산업공학
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• 제22권2호
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• pp.185-191
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• 2009

In this study, we propose an improved group location tracking scheme (GLS) called integrated GLS (IGLS) which, in addition to the group location registration of the GLS, sends an integrated group registration message to a virtual visitor location register (VVLR) instead of sending an individual group registration message. This integrated procedure of proposed scheme leads registration cost of group registration and group location registration to be reduced significantly. Numerical results demonstrate that our proposed IGLS outperforms conventional GLS and delayed GLS (dGLS). The IGLS can be applied effectively on public transportation systems such as subway, train and bus.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2008년도 제7회 추계학술대회 및 정기총회
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• pp.254-256
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• 2008

• 대한교통학회:학술대회논문집
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• 대한교통학회 2007년도 제57회 학술발표회논문집
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• pp.986-995
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• 2007

• 전기전자학회논문지
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• 제25권4호
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• pp.756-761
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• 2021

Dynamic route guidance (DRG) finds the fastest path from a source to a destination location considering the real-time congestion information. In Korea, the traffic state information is available by the public transportation data (PTD) which is indexed on top of the node-link map (NLM). While the NLM is the authoritative low-detailed road network for major roads only, the OpenStreetMap road network (ORN) supports not only a high-detailed road network but also a few open-source routing engines, such as OSRM and Valhalla. In this paper, we propose a DRG framework based on road network matching between the NLM and ORN. This framework regularly retrieves the NLM-indexed PTD to construct a historical speed profile which is then mapped to ORN. Next, we extend the Valhalla routing engine to support dynamic routing based on the historical speed profile. The numerical results at the Yeoui-do island with collected 11-month PTD show that our DRG framework reduces the travel time up to 15.24 % and improves the estimation accuracy of travel time more than 5 times.

• 한국환경보건학회지
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• 제48권1호
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• pp.44-51
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• 2022

Background: Air pollution is increasing together with industrialization and urbanization. In order to reduce air pollution, public transportation is recommended rather than private cars, and the number of passengers using public transportation is increasing accordingly. This study observes the concentration of indoor pollutants in city buses over time. Through this means, we intend to suggest a plan to manage the indoor air quality in city buses. Objectives: The concentration of indoor pollution in public transportation was investigated from April 2021 to January 2022. Based on this, we evaluated the exposure to indoor pollutants. Methods: Six city bus lines in an industrial city were selected for the research, and indoor pollution was measured through IoT (Internet of Things)-based sensor-type measuring devices. The concentration of pollutants was measured every minute, and statistical data were constructed based on the measurement results. Results: In all the city buses studied, the average concentration of pollutants were below the guidelines. However, some measurement results showed cases of exceeding the guidelines. As a result of the analysis by time zone, there were more cases in which pollutants exceeded the standard value during rush hour compared to at other times. A risk assessment for PM₁₀ was performed by evaluating the excess mortality risk from exposure and the risk from inhalation exposure. Conclusions: All measured indoor pollutants in the city buses did not exceed the guidelines. Also, the risk assessment results were found to be within the level of safety. However, if a city bus is used for a long time, there is a possibility that there may be an impact on the human body due to inhalation exposure, so additional management is required.

• 한국ITS학회 논문지
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• 제15권4호
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• pp.33-43
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• 2016

수도권 통합대중교통요금제를 위해 생성되고 있는 교통카드자료는 수도권 도시철도의 환승시간 및 횟수정보를 제공하지 못하고 있다. 도시철도에는 환승게이트가 설치되어 있지 않아 노선간의 환승정보는 설문조사나 목측을 통한 거시적 추정으로 진행된다. 따라서 교통카드자료를 토대로 계산되는 수도권 대중교통의 환승시간 및 횟수는 과소평가되는 문제점을 내포한다. 환승자료의 정확한 추정을 위해서는 교통카드 태그가 이루어지는 진입 및 진출 게이트 사이에서 발생하는 통행경로에 대한 설명이 필요하다. 본 연구는 교통카드 단말기 태그자료를 기반으로 환승현황을 파악하기 위한 통행경로모형을 구축하고 수도권에서 발생하는 환승정보를 도출한다. 이를 위해 단말기 운영체계와 도시철도의 네트워크 특성을 일치시키기 위한 빅노드 개념을 도입한다. 또한 수도권 도시철도의 효과적 네트워크 구동을 위해 링크표지개념을 도입한다. 교통카드단말기의 행정구역정보를 토대로 시군구의 중죤, 서울-경기-인천의 대죤에서 발생하는 환승시간과 횟수를 도출한다. 2014년 일일 대중교통카드자료를 이용하여 전수화된 환승특성데이터를 구축하고 수도권 도시철도의 환승저항에 대한 통합적인 자료로서 활용가능성을 제시한다.

• Journal of Preventive Medicine and Public Health
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• 제38권3호
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• pp.252-258
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• 2005

Major approaches of Social epidemiology; 1)holistic, ecological approach, 2)population based approach, 3)development and life-course approach, 4)contextual multi-level approach, have stressed the importance of not only social context of health and illness, but also the population based strategy in the health interventions. Ultimately, it provides the conceptual guidelines and methodological tools to lead toward the healthy public policies; integrated efforts to improve condition which people live: secure, safe, adequate, and sustainable livelihoods, lifestyles, and environments, including housing, education, nutrition, information exchange, child care, transportation, and necessary community and personal social and health services.

• 농촌계획
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• 제25권3호
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• pp.77-87
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• 2019

This study is to identify the factors affecting commuting time and modes in urban and rural areas using household traffic survey data. The findings indicated that commuting time using passenger car in rural areas was 1.6 times longer than those in urban areas. When citizen use public transportation, however, there was not much difference in commuting time in urban and rural areas. Among the various factors affecting commuting time in rural areas (13 factors have statistical significance), the most influential factors were that public transportation, managers and office workers, functional and device managers, and passenger car. In urban areas, the highly influential factors were public transportation and walking among the 16 affecting factors which have statistical significance. The commuting time in rural areas increased according to the occupation types, but the commuting time of full-time workers decreased. This phenomenom means that occupation groups with the full-time system prefer residential areas in the densely populated town.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.732-735
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• 2006

Downtown cities in Japan are facing sharp fall in customers and continued shut down of shops due to decrease of population, increase in family cars and flowing of customers into the suburban large-scale retail stores. Omura City in Nagasaki Prefecture, Japan is no exception to this. For the revitalization of the downtown, many actions have been taken to open the vacant shops. However, transportation problem is the most important one to be solved for the citizens including the elderly people having difficulty in movement. Accordingly, this study was aimed at the revitalization of the downtown by substantiality public transportation. We have attempted to develop routes from the view-point of convenience by using Analytic Hierarchy Process (AHP) and Geographic Information Systems (GIS). As a result of the study, we were able to select three bus transportation areas by incorporating qualitative factors into the analysis. Finally, the study concluded that, revitalization activities of the downtown city itself is required in addition to re-structuring of bus transportation system for the revitalization of the downtown city.