• Title/Summary/Keyword: 교통사고재현

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A Method for Pedestrian Accident Reconstruction Using Optimization (최적화방법을 이용한 보행자 충돌사고 재현기법 개발)

  • 유장석;홍을표;장명순;박경진;손봉수
    • Journal of Korean Society of Transportation
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    • v.20 no.3
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    • pp.105-113
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    • 2002
  • As the number of pedestrian accident increases, the reconstruction of an accident becomes important to find the source of the fault. Generally, accidents are reconstructed by the intuition of experts or primitive physics. A reconstruction method is proposed using sophisticated optimization technology. At first, a dynamic simulation model is established for the accident environment. Occupant analysis for automobile crashworthiness is employed. The situation before an accident is identified by optimization. The impact velocity and the position of the pedestrian are utilized as design variables. The design variables are found by minimizing the difference between the simulation and the real accident. The optimization process is performed by linking an occupant analysis program MADYMO to an optimization program VisualDOC. Since the involved analysis is dynamics and highly nonlinear, response surface method is selected for the optimization process. Problems are solved for various situations.

Effectiveness of Positive Guidance for Speed Reduction at Signalized Intersection by Using Driving Simulator (도로주행시뮬레이터를 활용한 신호교차로 속도저감에 대한 Positive Guidance 효과 연구)

  • Noh, Kwan-sub;Lee, Jong-hak;Kim, Jong-min
    • International Journal of Highway Engineering
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    • v.13 no.1
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    • pp.59-67
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    • 2011
  • It can prevent traffic accidents in a way as taking precautionary measures for road safety at signalized intersection in advance. Particularly, traffic accidents can be reduced at relatively low cost without redesigning alignments. That is 'Positive Guidance method' which can help prevent traffic accidents through improvement of road facilities at signalized intersection. In this study, potentially higher hazardous signalized intersection due to speeding was selected through site investigation. Field analysis at designated section was conducted and devised a plan for improvements of road facilities. Subjects drove in driving simulator in 3-D virtual reality of designated intersection. Based on data from simulator, statistical analysis(t-verification) was conducted for 'Before and After effectiveness' of speed reduction. As a result, it indicates that speed reduction was effective after improvements at each spot in driving simulator. In the future, hazardous signalized intersections which can be applied for PG method will be effective for road safety based on this research.

An Analysis of Application for Road Horizontal Alignment by the Combined RTK GPS/GLONASS (RTK GPS/GLONASS 조합에 의한 도로의 평면선형 적용 분석)

  • 이종출;서동주;노태호;장호식
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2002.04a
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    • pp.93-102
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    • 2002
  • 도로상에서 발생되는 교통사고의 많은 부분이 도로의 선형불량에 기인된다. 이러한 도로의 개량설계를 위하여서는 도로의 선형을 정확히 분석할 필요가 있으며, 도로의 설계도와 주요점의 좌표가 필요하게 된다. 따라서, 본 연구에서는 현재 많이 연구되고 있는 인공위성중 RTK GPS/GLONASS의 조합에 의하여 획득된 3차원 자료를 기존 설계도의 제원을 근거로 하여 위치정밀도를 비교하며, 이렇게 재현된 도로의 선형을 평가함으로써 인공위성을 이용한 도로의 선형정보체계를 보다 효율적이고 실용적으로 사용하기 위한 한 접근방법을 제시하고자 한다.

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Analysis for Traffic Accident of the Bus with Advanced Driver Assistance System (ADAS) (첨단안전장치 장착 버스의 사고사례 분석)

  • Park, Jongjin;Choi, Youngsoo;Park, Jeongman
    • Journal of Auto-vehicle Safety Association
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    • v.13 no.3
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    • pp.78-85
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    • 2021
  • Recently a traffic accident of heavy duty vehicles under the mandatory installation of ADAS (Advanced Driver Assistance System) is often reported in the media. Heavy duty vehicle accidents are normally occurring a high number of passenger's injury. According to report of Insurance Institute for Highway Safety, FCW (Forward Collision Warning) and AEB (Automatic Emergency Braking) were associated with a statistically significant 12% reduction in the rate of police-reportable crashes per vehicle miles traveled, and a significant 41% reduction in the rear-end crash rate of large trucks. Also many countries around the world, including Korea, are studying the effects of ADAS installation on accident reduction. Traffic accident statistics of passenger vehicle for business purpose in TMACS (Traffic safety information Management Complex System in Korea) tends to remarkably reduce the number of deaths due to the accident (2017(211), 2018(170), 2019(139)), but the number of traffic accidents (2017(8,939), 2018(9,181), 2019(10,095)) increases. In this paper, it is introduced a traffic accident case that could lead to high injury traffic accidents by being equipped with AEB in a bus. AEB reduces accidents and damage in general but malfunction of AEB could occur severe accident. Therefore, proper education is required to use AEB system, simply instead of focusing on developing and installing AEB to prevent traffic accidents. Traffic accident of AEB equipped vehicle may arise a new dispute between a driver's fault and vehicle defect. It is highly recommended to regulate an advanced event data recorder system.

Implementation of Driver Management Supervision System through AI Image Recognition Module (AI 영상 인식 모듈을 통한 운전자 관리 감독 시스템 구현)

  • Hyun Jun Suh;Min Ji Kim;Jae Hyun Shim;Seung Don Lee;JeongEun Nah
    • Proceedings of the Korea Information Processing Society Conference
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    • 2023.11a
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    • pp.813-814
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    • 2023
  • 매년 졸음 및 부주의 운전으로 인한 교통사고로 인명 및 재산 피해가 끊이지 않고 있다. 즉각적인 졸음 감지만을 위한 기존 시스템의 단점과 한계를 보완하고자, 본 논문에서는 위험 행동을 감지한 후 당시 사진과 데이터를 저장하고 이를 점수로 환산하여 장기적인 운전 습관 개선을 목표로 하는 운전자 관리 감독 시스템을 구현하였다. 이 시스템은 화물차 운전자와 같이 장시간 운전을 하는 대상에게 안전 주행을 장려하고 올바른 운전문화를 확립하게 하여 교통안전에 긍정적 역할을 담당할 수 있다.

Estimation of Fatality Reduction by Introducing Technical Regulation on Pedestrian Protection (보행자 충돌안전기준 도입에 따른 사망자수 감소 효과 추정)

  • Oh, Cheol;Kang, Youn-Soo;Kim, Won-Kyu;Kim, Beom-Il
    • Journal of Korean Society of Transportation
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    • v.23 no.3 s.81
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    • pp.49-57
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    • 2005
  • This study developed a methodology for estimating the fatality reduction by introducing technical regulation on pedestrian protection in pedestrian-vehicle collisions. Modeling a probabilistic pedestrian fatality model with logistic regression approach was one of keen interests, which employed in estimating the fatality reduction. Collision speed obtained from the accident reconstruction was used in the model development. The effects of fatality reduction, in case various Head Injury Criterion (HIC) and collision speeds are applied for the regulation. were presented as the major outcome of this study. It is expected that the outcome of this study would be an invaluable tool to assist in developing various technologies and policies for pedestrian protection.

Smart Mobile Blackbox DVR in Car Environment (자동차 환경에서 스마트 모바일 블랙박스 DVR)

  • Choi, Sun-O;Kim, Young-Po;Im, Yong-Soon;Kim, Young-Ja;Kang, Eun-Young
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.13 no.5
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    • pp.9-15
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    • 2013
  • In this paper, automatic recognition of an accident and whether service delivery and risk driving through the giving of the driver to correct driving habits before and after the accident to reproduce highly scalable video Smart Mobile Blackbox DVR (SMBD, Smart Mobile Blackbox DVR) Computer of the model was designed. SMBD on embedded systems equipped with wireless capabilities to sleep in the car accident point and the image information by wireless communications, by notification in the control center, 24-hour emergency rescue service and traffic information can be provided. The vehicle ECU (Electronic Control Unit) of the vehicle information and sensor data in conjunction with wireless eCall (Emergency Call) services can be realized.

A Methodological Study of Korean In-Depth Accident Study DB (한국형 교통사고심층분석자료 구축방법론에 대한 연구)

  • Youn, Younghan;Lee, S.;Park, G.Y.;Kim, M.;Kim, I.;Kim, S.;Lee, J.
    • Journal of Auto-vehicle Safety Association
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    • v.7 no.2
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    • pp.15-18
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    • 2015
  • The availability of in-depth accident data is a prerequisite for each efficient traffic safety management system. Identification and definition of the relevant problem together with knowledge of the data and parameters describing this problem is essential for its successful solution. Comprehensive, up-to-date, accident data is needed for recognition of the scope of road safety problems and for raising public awareness. Reliable and relevant data enable the identification of the contributory factors of the individual accidents, and an unveiling of the background of the risk behaviour of the road users. It offers the best way to explore the prevention of accidents, and ways to implement measures to reduce accident severity. In this study, reviewing the existing iGlad and GIDAS system, KIDAS data format can be finalized through feasibility evaluation. The progressive approach is proposed to successful settlement of Korea in-depth accident study. As the initial stage of in-depth investigation DB construction, the KIDAS is not repetition of the current police based TAAS. It is essential part of improving vehicle safety and reduction of traffic fatality in Korea. 72 Contributing factors like road and traffic characteristics, vehicle parameters, and information about the people involved in the accident have to be investigated and registered as well in the KIDAS.

Modelling and Evaluation of Traffic Flow with Variable Speed Limit on Highway (연속류 가변속도제어 모형개발 및 효과분석)

  • Cho, Hye-Rim;Kim, Young-Chan;Ha, Dong-Ik
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.10 no.1
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    • pp.16-26
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    • 2011
  • Variable speed limit(VSL) is one of the highway ITS techniques designed to prevent accidents and traffic slow down by reducing congestion or speed variation between vehicles and lanes prior to arrive at the accident location by limiting speed. In Korea, while people have recognized the need for variable speed limit beginning with Seoul's urban expressway and installed facilities in order to provide guide for speed limit per lane and lane use, there has not been enough development of algorithm for internal administration as well as research on the basic principles behind administering variable speed limit. This study is for modeling and evaluating the VSL strategies based on the traffic flow theory. Supply-Demand method of the Cell Transmission Model is applied to demonstrate the traffic features and shockwaves to upstream of the bottleneck with/without VSL. We verified the explanation of Cell Transmission Model for the numerical example. and as the result, it is found that VSL strategies can reduce the total travel time in the congested section and variation of the speed. It means VSL is useful to improve the traffic condition and the safety on highway

Le Fort I Osteotomy and Posterior Maxillary Segmental Osteotomy for Correction of Malunioned Maxilla (부정유합된 상악골 골절로 인해 발생한 부정교합의 상악골 수평 골절단술과 후방분절 골절단술에 의한 치험례)

  • Park, Hui-Dae;Bae, Yun-Ho;Park, Jae-Hyun;Lee, Myeong-Jin;Chin, Byung-Rho;Lee, Hee-Keung
    • Journal of Yeungnam Medical Science
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    • v.7 no.1
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    • pp.203-210
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    • 1990
  • This is a case report of correction of malunioned maxilla after traffic accident by Le Fort I osteotomy and posterior segmental osteotomy. By this procedure, authors obtained the following results. 1. The malinioned maxilla after traffic accident which had anterior crossbite, posterior open bite and scissor's bite were corrected by Le Fort I osteotomy and posterior segmental osteotomy. 2. No postoperative infection and specific complication were seen in this case. 3. Postoperative intermaxillary fixation was maintained for 8 weeks. And then, the patient could open his mouth in normal range after a week of intermaxillary fixation removal. 4. For rigid fixation and reducing relapse, the osteotomized maxilla was fixed with miniplates.

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