• Journal of the Korean association of regional geographers
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• v.10 no.2
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• pp.252-266
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• 2004

This study analyzes the influence of the construction of a high-speed railroad on territorial organization in France. After development of a new transportation network, the French territorial organization has been largely modified. Many economic urban areas are modified by their position in the territorial hierarchy according to their condition of connection with the TGV network. At first, spatial convergence is the most important effect of the TGV network construction. Second, the development of a transportation network concentrated in the Paris area has influence as an intensified factor on metropolitan areas and as a weakening factor on middle- and small-sized cities. Thus, this system has risk in increasing territorial imbalance in France. Third, to implant an economic activity zone around new TGV stations, a new town or a new economic center starts to develop. This is going to grow into a second core outside of the old city center so that regional spatial organization is transformed from a mono-polarized(mono-centric) organization to a multi-polarized(polycentric) one. Lastly, the integration of the EU railroad system enhances the concentration of economic activity in European metropolitan areas as each metropolitan area tries to develop more competitive space for its rising position in the global urban hierarchical system.

• Journal of Korean Society of Transportation
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• v.29 no.1
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• pp.57-67
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• 2011

This study has been conducted to provide the basic materials about the occurrence structures, causes and choice of treatments of the traffic accident offenders' PTSD(Posttraumatic Stress Disorder). The results of this study can be summarized as follows. First, accident offenders', not victims', PTSD conditions, which has been only estimated until now, are measured by nationwide questioning survey. Second, accident offenders' changes of driving attitude after accidents could be typed by factors analysis in the 20 driving situations closely connected to the occurrence of traffic accidents. Third, by the t-test, the difference of driving attitudes in primary driving situations according to existence of PTSD is distinguished. Six driving situations, which are found significant by t-test, are applied to structural equation. So the variables related to PTSD and the models which analyze the attitude changes of driving are constructed. This study provides the basic materials to help the reduction and prevention of the occurrence of PTSD.

• Journal of Korean Society of Transportation
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• v.24 no.3 s.89
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• pp.51-61
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• 2006

Interchanges are passages for vehicle and pedestrians and a gateway to nearby facilities, and a place to stay of vehicle and Pedestrians. Interchange traffic must be able to navigate well for safety and convenience. Traffic safety and efficiency are influenced by the interchange. In this study, relative delays of vehicles are compared by changing traffic interchanges. the volume of traffic, the number of lanes, the rate of left turns vehicle on the interchanges of urban arterial roads. The object of this study is to compare Grade crossing interchange, Diamond interchange. Roundabout interchange. SPUI(Single Point Urban Interchange), Echelon interchange). Echelon interchange. By VISSIM Simulation, this study drew the relative delay value of every scenario and compared the delay value of each vehicle considering construction expenses. Through this comparison study, ideal interchange is dependent on the volume of traffic, the number of lanes, and the rate of left turns.

• Korean Journal of Culture and Social Issue
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• v.11 no.1
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• pp.25-42
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• 2005

The present research examined the proposition that once people violate traffic regulations, they would experience cognitive dissonance and subsequently engage in changing their attitudes toward the law negatively in order to reduce the dissonance. In an experiment, participants were presented with three scenarios in which a person violated traffic laws, and they were asked to imagine themselves as the person of the scenarios and write statements supporting the unlawful behaviors. Participants' attitudes toward the general traffic law and the regulations related to the violations were measured 8 weeks before and right after the experimental treatment. The results, as expected, showed that their attitudes toward the general traffic law and the specific regulations in the scenarios changed negatively after writing the statements. In each secnarios, the participants who chose to wrote statements supporting the unlawful behaviors showed great attitude changes that those who did not write the statements. Furthermore, attitudes toward the regulations that were not directly related to the scenarios did not change significantly, and participants who were expected to experience stronger dissonance arousal (e.g.., supported more unlawful behaviors or had have more positive attitudes toward the law before the experiment) showed greater attitude changes. These results support the effects of trivial unlawful behaviors on attitudes toward the law and strongly suggest the role of cognitive dissonance underlying the effects.

• Transportation Technology and Policy
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• v.9 no.2
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• pp.31-39
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• 2012

• Journal of Korean Society of Transportation
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• v.18 no.5
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• pp.43-56
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• 2000

본 연구의 목적은 우리 나라의 주요 간선도로상에서 운영되고 있는 좌회전 ·유턴 공용차로에 대한 적절한 보정계수를 산정하는 것이다. 이에 본 연구에서는 좌회전 2차로(1차로 유턴공용) 3개 지점 및 좌회전 ·유턴 공용 1타로 3개 지점에 대해서 연구를 수행하였으며, 유턴 전용차로 2개 지점에 대해서도 연구를 수행하였다. 좌회전 유턴 공용차로에서의 유턴 비율에 따른 포화교통류율의 변화를 분석하였으며, 회귀모형을 도출하였다. 본 연구의 연구 결과는 다음과 같다. 첫째, 중앙분리대로 분리된 유턴 전용차로를 대상으로 분석한 유턴 포화교통류율은 2,105(pcphgpl)로 산정되었다. 둘째, 좌회전 2차로(1차로 유턴공용)에 대하여 3개지점을 대상으로 유턴 비율에 따른 포화교통류율의 살펴보고 적절한 보정계수를 산정하였으며 각 차로별 좌회전 포화교통류율은 1차로는 2,105(Pcphgpl), 2차로는 2,023(Pcphgpl)이 산정되었다. 또한 유턴 비율과 포화교통류율에 따른 회귀모형을 산정하였다. 셋째, 좌회전 ·유턴 용 1차로에 대하여 3개지점을 대상으로 유턴 비율에 따른 포화교통류율의 변화를 살펴보고, 적절한 보정계수를 산정하였으며, 좌회전 포화교통류율은 2,143(Pcphgpl)으로 산정되었다. 또한 유턴 비율과 포화교통류율에 따른 회귀모형을 산정하였다. 넷째, 회귀모형의 산정결과 좌회전 ·유턴 공용차로에서는 유턴 비율에 따라서 포화교통류율이 감소하는 것으로 나타났다. 본 연구의 기대효과로는 유턴 비율에 따른 좌회전 유턴 공용차로의 포화교통류율 감소에 대하여 용량분석시 적용할 수 있는 보정계수를 제시함으로서 보다 정확한 신호교차로의 운영분석을 할 수 있다고 판단된다. 또한 신호시간 설계시에도 유턴 수요에 따른 적절한 설계에 도움을 줄 수 있으며 따라서 신호교차로의 운영효율을 증대시키는데 기여할 것으로 판단된다.

• Journal of Korean Society of Transportation
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• v.26 no.4
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• pp.111-121
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• 2008

Using variable speed limits (VSL) is a key strategy for preventing traffic accidents and alleviating traffic congestion. This study proposes an algorithm to operate VSLs on freeways for traffic safety. The proposed algorithm consists of two components based on accident likelihood estimation and analysis of safe stopping distance under various environmental conditions. A binary logistic regression technique is used for estimating accident likelihood. It is expected that the proposed algorithm would be successfully applied in practice in support of an integrated traffic and environmental condition monitoring system. Technical issues associated with the field implementation are also discussed.

• Journal of Korean Society of Transportation
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• v.22 no.7 s.78
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• pp.61-67
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• 2004

It is needed for one to design the better models estimating emission and then with the real time data, make the monitoring system simulating emission rate because of having built the basement of accepting real-time traffic information in ITS projects. The objective of the study is to develop the monitoring system visualizing air pollution to a certain place. It is based on the estimated emission from the patterns of individual vehicles and the changes of traffic flow. For constructing simulator, we loaded referring algorithm in actuality program and simulates the traffic flow movement in a microscopic viewpoint. The simulator is able to express not only the movement of each car but also to visualize processing the emission and diffusion of the air pollutant by computer program. Not only expresses the simulation process the angle of vision but it also cutting down environment expenses and improving the traffic impact assessment and the traffic impact assessment.

• Transportation Technology and Policy
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• v.7 no.1
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• pp.7-12
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• 2010

• Transportation Technology and Policy
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• v.1 no.1
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• pp.25-36
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• 2004