• Journal of Korean Society of Transportation
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• v.23 no.3 s.81
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• pp.7-19
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• 2005

Mode choice Analysis is essential analysis stage in transportation demand forecasting process. Therefore, methods for calibration and forecasting of mode choice model in aspect of practical view need to be discussed in depth. Since 1980s, choice models, especially Logit model, are spread widely and rapidly over academic area, research institutes and consulting firms in Korea like other developed countries in the world. However, the process of calibration and parameter estimation for practical application was not clearly explained in previous papers and reports. This study tried to explain clearly the calibration process of mode choice step by step and suggested a forecasting mode choice model that can be applicable in real policy analysis by using household survey data of Pusan metropolitan are. The study also suggested a way of estimating attributes which was not observed during the household survey commonly such as travel time and cost of unchosen alternative modes. The study summarized the statistical results of model specification for four different Logit models as a process to upgrade model capability of explanation for real traveler's choice behaviors. By using the analysis results, it also calculated the value of travel time and compared them with the values of other previous studies to test reliability of the estimated model.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.6
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• pp.2473-2481
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• 2013

The two characteristics of two-lane-and-two-way traffic flow are platoon and overtaking triggered by low-speed vehicle. It is crucial to develop a robust model which simultaneously generates the behaviors of platoon by low-speed vehicle and overtaking using opposite lane. Hence, a microscopic two-lane and two-way vehicle model was introduced (B. Yoon, 2011), which is based on CA (Cellular Automata) which is one of discrete time-space models, in Korea. While the model very reasonably explains the behaviour of overtaking low-speed vehicle in stable traffic flow below critical density, it has shortcomings to the overtaking process in unstable traffic flow above the critical density. Therefore, the objective of this study is to develope a vehicle model to more realistically explain overtaking process in unstable traffic flow state based on the model developed in the previous study. The experimental results revealed that the car-following model robustly generates the various macroscopic relationships of traffic flow generating stop-and-go traffic flow and the overtaking model reasonably explains the behaviors of overtaking under the conditions of both opposite traffic flow and stochastic parameter to consider overtaking in unstable traffic flow state. The vehicle model presented in this study can be expected to be utilized for the analysis of two-lane-and-two-way traffic flows more realistically than before.

• Journal of Korean Society of Transportation
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• v.16 no.1
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• pp.99-110
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• 1998

본 연구에서는 인간의 판단과 유산한 구조를 갖는 퍼지근사추론모형(FARM)을 구축하여 교통수단 선택형태에 적용하고자 하였다. 이를 위해 먼저 근사추론모형의 이론적 배경을 살펴보고 버스와 지하철간의 수단선택 모형을 구축하였다. 입력변수로 버스와 지하철간의 총통행시간의 차이와 총통행비용의 차이를 선정하였으며 출력변수로 버스이용확률을 사용하였다. 각 변수에 대한 퍼지집합은 각각 5개씩의 언어적 인 표현으로 구성하였으며, 규칙은 총 25개로 설정하였다, 구축된모형의 현실적 타당성을 검토하기 위해 서 실제 조사자료와 비교하였다. 분석결과 본 연구에서 구축된 퍼지근사추론모형이 통행자들의 수단선택 행태를 현실적으로 설명하는 것으로 나타났다.

• Journal of Preventive Medicine and Public Health
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• v.26 no.4 s.44
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• pp.508-533
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• 1993

A wide range of health professionals have interest in changing the health behavior of individuals. To intervene effectively and to make informed judgements about how to measure the success of such interventions, health professionals must have an deep understanding of health behavior. This paper provides an overview of the thories of health-related behaviors and the strength and weakness of each, how the theories relate to others, and how they can be used in practice. The theories reviewed include Suchmann's stages of illness experience, Health belief model, Attribution theory, Fishbein's theory of reasoned action, Multiattribute utility models, Consumer information processing, and Anderson's models. Finally, this paper introduces the reader to interesting research findings in our country.

• Journal of Korean Society of Transportation
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• v.1 no.1
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• pp.64-81
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• 1983

소비자 행태에 관한 신고전 경제이론을 통행수요의 분석에 그대로 적용하는데 문제 가 되는 특기 사항으로는 운임이외에 통행시간과 같은 서어비스 질도 통행수단의 선택에 영 향을 미친다는 점과 특정 두지점간의 통행에서 동일한 소비자도 여러 수송수단을 이용한다 는 점을 들수 있다. 본 연구의 주제는 이와같은 통행수요의 독특한 특성을 반영할 수 있는 소비자의 효용최대화모형의 설정과 이 모형에서 유도된 수요함수의 구조를 분석함에 있다. 상술하면, 통행시간 가치의 불확실성 아래에서 효용을 극대화하는 의사결정문제를 Stochastic Programming 모형으로 표현하였다. 또한 이 모형에서 유도된 특성 통행수단의 수요함수는 이 수단이 가장 유리한 시간가치의 범위에 대한 부정적분으로 표현되며 이 적분 범위와 피적분함수는 모든 경쟁수단의 운임과 통행수단의 함수로 정의됨을 증명하였다. 또 한 수요함수는 통행수요에 관한 통계분석모형에서 묵시적으로 가정되고 있는 통행수단간 대 체성(Property of gross substitute)과 대각방향우세성(Property of diagonal dominance)등의 특성을 가지고 있음을 보여 주었다.

• Journal of Korean Society of Transportation
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• v.19 no.3
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• pp.133-144
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• 2001

The purpose of this study is to develop micro simulation model for large-scale network with driver's behavior model. This study is performed for uninterrupted flow road section. And this model is developed to simulate traffic flow of the real network with unique geometric structure. The vehicle transmission and drivers' behavior model based on the exiting Cellular Automata approach.

• Korean Business Review
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• v.21 no.1
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• pp.1-17
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• 2008

This article examines the establishment of the game theoretic model for the cleaner vehicles and analyzes the established model. We discuss the way to represent the players' preferences over the outcomes to make the model applicable in real practice. In this article we employ the real data to represent the preferences. In the analysis of the model we consider various scenarios and discuss how we can use GAMBIT, which is a game theory analysis software, to find solutions in each proposed scenario.

• Proceedings of the Korean Society for Information Management Conference
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• 2006.08a
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• pp.5-10
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• 2006

정보이용자연구는 정보추구자들이 중심이 되는 이용자 중심으로 패러다임 전환이 이루어졌고 연구과정에 보다 관심을 가지게 되었으며, 정보추구자의 특성과 요구를 알기 위한 많은 시도가 이루어지고 있으며, 개인적인 정보제공자와 더 많은 시간을 보내고 있음을 알 수 있다. 이러한 시도와 노력을 통하여 개발되는 정보이용행태 모형은 이용자를 이해하고 기술하는 깊이가 심화되는 현상을 나타내고 있다. 정보이용자연구는 도서관업무 및 정보서비스의 모든 분야에 걸쳐 이해의 기초가 되는 영역으로, 연구결과 및 지금까지 도출된 많은 모형들이 상황에 맞게 정보 서비스, 정보시스템, 도서관 정책결정 및 경영 등의 영역에서 고려되고 적용되고 있다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.5D
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• pp.709-716
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• 2006

The rapid changes of family structure such as singles, working couples and so on have effects on a travel behaviour. One of the characteristics from this is the increasing portion of trip-chain, in which plural activities were conducted in a "single outgoing" travel. Therefore travel must be considered as location change to conduct various activities instead of pursuing single travel purpose. This paper specifies a behavioral homogeneous person group by a job, a possession of cars. Based on this classification of person groups and their activity diary, the sequence, time and travel mode of activities in a day can be verified. As a case study household survey was conducted in city Kongju. The survey result shows that the classification of behavioral homogeneous person group based on criteria like employment status and car ownership bring a good result to forecast trip generation in traffic zone.

• Journal of Korean Society of Transportation
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• v.20 no.3
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• pp.83-92
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• 2002

Freight mode choice models are essential to the analysis of many areas of transport research. However, observations of actual market choices have only been made in a limited number of situations. Therefore, stated preference(SP) techniques have emerged as an alternative source of actual market choices to be used for estimating freight mode choice models. Considerable confidence exists about SP data, but little consideration has been given to the potential for estimation bias. This paper has been motivated by the theoretical side of estimating SP discrete choice models, focusing on a case study of freight mode choice. Recently developed simulation methods are used to construct inherent random heterogeneity legit models, which consider individual heterogeneity, its inheritance to the next choices and overcome the independence from irrelevant alternatives (IIA) property. This Paper contributes to the development of models dealing with heterogeneity and its inheritance, and sheds light on the heterogeneity of freight transport.