• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2010년도 추계학술대회
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• pp.41-61
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• 2010

With increasing the quality of life in proportion to the national income, we have had cars as more convenient and safe means of transportation for a long time. The more we have the benefits from cars, the more seriously we should consider problems such as the destruction of the environment by air pollution, traffic accidents, parking problems, traffic congestion, etc. as social cost caused by the increase of cars. Among them, the traffic accidents are very serious, especially the accidents of the business cars occurs five times more than those of the private cars. Therefore if we analyze the cases of the various kinds of syst.em, test the results and apply them to business cars, we will reduce the traffic accidents of business cars.

• 공학교육연구
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• 제13권5호
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• pp.20-24
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• 2010

The total number of deaths by traffic accidents is decreasing every year in our country. However, in 2009, children died in traffic accidents at a rate of 2.3 deaths per 100,000 children, which was higher than the average of OECD countries (1.9 deaths per 100,000 children). In particular, traffic accidents are showing rapid increase in school zone during the past 2 years because of problems in the designation and management of school zone. Traffic safety facilities such as road sign, reflector mirror, speed bump have the ultimate limit of vehicle accidents prevention. Thus, in school zone, children safety is still not guaranteed due to illegal parking and the absence of driver's awareness of safety. Therefore, In order to protect children from traffic accidents within school zones, we have realized a safe school zone system, which enables the drivers to better know the intended school zones and creates pedestrian environment through unmanned monitoring camera, using LabVIEW.

• 한국안전학회지
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• 제32권6호
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• pp.137-142
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• 2017

This study deals with the relation between traffic accident and urban decline. The purpose of this study is to develop the regional accident models of elderly drivers. In order to develop the count data models, 2009-2015 traffic accident data from TAAS(traffic accident analysis system) and urban decline data from urban regeneration information system are collected. The main results are as follows. First, the null hypothesis that there is no difference in the accident number between elderly and non-elderly drivers is rejected. Second, 8 accident models which are all statistically significant have been developed. Finally, common variables between elderly and non-elderly are ratio of elderly people, elderly person living alone/1,000 persons and wholesale/retail employments/1,000 persons. This study could be expected to give many implications to making regional accident reduction policy.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.437-439
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• 2006

Actually, The present traffic accident detection system is subsisting limitation of accurate distinction under the crowded condition at intersection because the system defend upon mainly the image information at intersection and digital image processing techniques nearly all. To complement this insufficiency, this article aims to estimate the level of present technology and a realistic possibility by analyzing the acoustic characteristic of crash sound that we have to investigate for improvement of traffic accident detection rate at intersection. The skid sound of traffic accident is showed the special pattern at 1[kHz])${\sim}$3[kHz] bandwidth when vehicles are almost never operated in and around intersection. Also, the frequency bandwidth of vehicle crash sound is showed sound pressure difference oyer 30[dB] higher than when there is no occurrence of traffic accident below 500[Hz].

• 대한교통학회지
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• 제26권5호
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• pp.185-194
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• 2008

본 논문에서는 기본적으로 라우팅(routing) 메커니즘을 이용하는 개미 알고리즘(ant algorithm)을 이용하여 실시간으로 변화하는 교통 상황과 U턴, P턴 및 회전제약(좌회전 및 U턴 금지)을 고려하여 다수의 최적경로를 제한된 시간내에 탐색제시 할 수 있는 경로 유도 방법을 제시하고자 한다. 이 방법은 기존 최적경로알고리즘과 비교하여 회전 제약 상황을 쉽고 빠르게 고려할 수 있는 장점이 있다.

• 한국컴퓨터정보학회논문지
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• 제4권2호
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• pp.95-104
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• 1999

자동차가 증가함에 따라 교통 안전화를 목적으로 한, 자동차 전반에 관한 연구들이 주요한 과제로 대두되고 있다. 무인화 주행을 위한 시각 시스템은 미리 알려져 있지 않은, 일반적인 도로에서 주행하기 위해서는 연속적으로 입력되는 도로정보로부터 도로정보의 모델을 생성하여 주행에 필요한 도로정보를 추출한다. 본 논문에서는 자동 항법 시스템 중에서 자동 조종에 필요한 도로정보 표지판의 추출 방법을 하프변환과 유전자 알고리즘을 이용하여 제안하고자 한다.

• Journal of Communications and Networks
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• 제9권4호
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• pp.408-418
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• 2007

In this paper, we address the question of dynamic network provisioning for time-varying traffic rates, with the objective of maximizing the system throughput. We assume that the network is capable of providing bandwidth guaranteed traffic tunnels for an ingress-egress pair and present an approach that (1) updates the tunnel routes and (2) adjusts the tunnel bandwidths, in an incremental, adaptive manner, based on the variations in the incoming traffic. First, we consider a simpler scenario where tunnel routes are fixed, and present an approach for adjusting the tunnel bandwidths dynamically. We show, through simulations, that our dynamic bandwidth assignment algorithm significantly outperforms the optimal static bandwidth provisioning policy, and yields a performance close to that of the optimal dynamic bandwidth provisioning policy. We also propose an adaptive route update algorithm, which can be used in conjunction with our dynamic bandwidth assignment policy, and leads to further improvement in the overall system performance.

• 한국시뮬레이션학회논문지
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• 제6권1호
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• pp.97-108
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• 1997

For the purpose of decreasing economic loss from the traffic jam, a car route guidance system efficiently utilizing the existing roads has attracted a great deal of attention. In this paper, the search algorithm for optimal path and alternative paths, which is the main function of a car route guidance system, was presented using evolution program. Search efficiency was promoted by changing the population size of path individuals in each generation, applying the concept of age and lifetime to path individuals. Through simulation on the virtual road-traffic network consisting of 100 nodes with various turn constraints and traffic volumes, not only the optimal path with the minimal cost was obtained, avoiding turn constraints and traffic congestion, but also alternative paths with similar costs and acceptable difference was acquired, compared with optimal path.

• Journal of Information Processing Systems
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• 제15권5호
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• pp.1218-1230
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• 2019

This study proposes a novel video traffic flow detection method based on machine vision technology. The three-frame difference method, which is one kind of a motion evaluation method, is used to establish initial background image, and then a statistical scoring strategy is chosen to update background image in real time. Finally, the background difference method is used for detecting the moving objects. Meanwhile, a simple but effective shadow elimination method is introduced to improve the accuracy of the detection for moving objects. Furthermore, the study also proposes a vehicle matching and tracking strategy by combining characteristics, such as vehicle's location information, color information and fractal dimension information. Experimental results show that this detection method could quickly and effectively detect various traffic flow parameters, laying a solid foundation for enhancing the degree of automation for traffic management.

• 대한교통학회지
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• 제29권3호
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• pp.49-58
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• 2011

ITS 사업의 일환으로 교통정보 제공시스템이 점점 확대되어 다양한 매체를 통해 운전자에게 정보전달이 이루어지고 있다. 이러한 ITS 시스템의 구축은 어느 정도 이루어졌으며, 이제는 시스템의 효과적인 운영과 관리를 위한 평가의 중요성이 대두되고 있다. 본 연구의 목적은 VMS 교통정보제공시스템에 초점을 맞추어 이에 대한 효과적인 평가 방안을 제시하는 것이다. 특히 시스템이 가지는 여러 가지 편익항목들 중에서 이용자의 심리적 만족감 측면에서, 평가가 이루어질 수 있도록 정보제공수준과 이용자 만족도의 관계식을 도출하였다. 연속류 도로는 진출입이 매우 제한적인 도로이기 때문에, VMS 교통정보는 운전자들이 의사결정을 하는데 매우 큰 역할을 한다. 이에 따라 이용자 중심에서 VMS 정보제공수준을 평가할 수 있는 방안을 제시함으로써 평가는 물론, 시스템의 확대나 구축의 목표 서비스수준으로도 활용할 수 있을 것이다. 본 연구를 보완하여 시스템의 개별적인 특성과 VMS의 다양한 기능을 함께 고려한다면 좀 더 체계적인 평가방안이 마련될 수 있을 것이다.