• Title/Summary/Keyword: Car crash accidents

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Implementation of Smart Traffic Safety Systems using Fuzzy Theory

  • Han, Chang Pyoung;Hong, You Sik
    • International Journal of Internet, Broadcasting and Communication
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    • v.12 no.4
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    • pp.71-82
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    • 2020
  • Traffic accidents due to excessive speed frequently occur in places where traffic signal controllers are installed, places where sharp curves exist, or places where the traffic signal cycle does not match the current time. These traffic accidents cause economic loss due to the destruction of road facilities and structures, and cause a big problem of increasing the number of traffic accident deaths. When a traffic accident occurs, leaving a tire mark before or after a car crash, pre-collision speed of the car is calculated using the law of conservation of momentum or the skid mark formula. In the skip skid mark generated in ABS brake vehicles and the combshaped yaw mark generated by tire trace caused by lateral sliding, there is a difference of 30-40% in the reliability of the vehicle speed calculated by the smite mark. In this paper, we propose an algorithm that can improve the calculation reliability in vehicle speed by using skid marks in order to compensate for this problem. In addition, we present an intelligent speed calculation algorithm for traffic safety and a computer simulation in order to prevent traffic accidents by estimating the speed of a vehicle, using Skid marks, Yaw marks, and ABS brake characteristics and fuzzy rules.

Characteristics of Vehicle Structure Deformation and Body Injury caused by Side Impact Test using AE-MDB (AE-MDB 시험결과에 따른 인체상해 및 차체 특성)

  • Kim, Doyup;Lee, Jaewan;Chang, Hyungjin;Yong, Boojoong
    • Journal of Auto-vehicle Safety Association
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    • v.3 no.2
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    • pp.34-41
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    • 2011
  • Side collisions (or side crash) account for 51.6% of all car to car accidents occurred in 2010. It is necessary to analyze those vehicles' structure deformation and passengers' injuries in the side collisions. A moving barrier (950kg) is currently used in the KNCAP side impact test. However, in order to enhance a passengers' safety in the side collisions, we introduce an AE-MDB (1500kg) which provides more severe conditions for this test. In this study, the test results using both barriers are compared and analyzed.

Stildy on the Methodology to Prevent Neck Injury at tow Speed Rear-End Impact (저속 후면 추돌 시 목부상해 예방을 위한 연구)

  • Park Insong;Chun Yongbum;Kim Guanhee;Lim Jonghun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.5
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    • pp.29-34
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    • 2005
  • 141,841 car-to-car collision had occurred in 2003, and among the accidents 51,796 were rear-end impact. According to insurance company for loss or damage, more than $60\%$ of rear-end impact victims suffer neck injury. This means at least 31,000 neck injury victims have happened in 2003. More than $97\%$ of the neck injury victims have low severity injury than A.I.S 2. Head restraint, which is designed to limit rearward head movement and equipped on seat, can considerably protect neck from rear-end impact. In this paper we evaluated head restraint geometry and drivers' sitting position according to RCAR standard and carried out low speed volunteer crash test. The crash speed is 4km/h and N.I.C value is used to determine injury probability. Through these research results we can introduce the method to prevent neck injury at rear-end impact.

Experimental Study on a New Test Method for Pole Side Impact (새로운 기둥측면충돌 시험방법에 관한 실험적 연구)

  • Kim, Dea Up;Woo, Chang Gi
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.24 no.6
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    • pp.613-618
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    • 2015
  • In recent years, WorldSID has been continuously developed and investigated to be the representative biofidelic anthropomorphic test device (ATD) as well as the device for replacement of the current EuroSID-2. In Korea, the side impact accident is one of the major severe accidents in terms of the number of accidents and fatality. Since 2003, the side crash test with a speed of 50 kph in the perpendicular direction has been initiated as a safety standard with EuroSID-1 at the first stage. Simultaneously, a 55 kph impact test has been conducted as a part of Korean New Car Assessment (KNCAP). Currently, only EuroSIDE-2 is accepted as a regulatory tool for vehicle certification and KNCAP. The tests with WorldSID are conducted experimentally in order to use WorldSID of the KNCAP in near future.

Impact Energy Absorbtion Characteristics Review on the Initial Design of TTX Mcp Car front-end Structure (기존선 틸팅차량 Mcp Car 차체 설계초안의 충돌에너지 흡수특성 고찰)

  • Kwon Tae-soo;Jung Hyun-Seung;Koo Jeong-Seo
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.732-737
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    • 2004
  • TTX(Tilting Train Express), which has improved traveling performance on curved track, is being designed in cope with future railway circumstance. Nowadays, in the world, many efforts are focussed on railway safety. Especially, a variety of researches on train crashworthiness have been conducted. As a part of these efforts, some equipments on TTX are designed to reduce fatalities and casualties in crash accidents. This paper introduces impact energy absorbtion characteristics on the initial design of the front end structure. Some comments are made briefly for improvement of initial structural design and future following researches.

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Evaluation of EuroSID-2 & WorldSID in Pole Side Impact (기둥측면충돌시험에서 EuroSID-2와 WorldSID 인체모형 평가에 관한 연구)

  • Kim, Dea Up;Woo, Chang Gi
    • Journal of Auto-vehicle Safety Association
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    • v.7 no.1
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    • pp.40-44
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    • 2015
  • In recent years, WorldSID dummy has been continuously developed and investigated to be a better represent biolfidelic ATD as well as a device for replacement of the current existing EuroSID-2. In Korea, the side impact accident is one of the major severe accidents in terms of numbers of accidents and fatality. Since 2003, 50kph 90degree side crash test has been initiated as a safety standard with EuroSID-1 at the first stage and also same time 55kph impact speed test has been conducted as a part of KNCAP program. Currently only EuroSID-2 is accepted as a regulatory tool for vehicle certification and KNCAP. In order to make use of WorldSID of KNCAP in the distant futuer the tests with WorldSID is conducted experimentally.

Facial Injury after Airbag Deployment in Occupant Motor Vehicle Accident (자동차 교통사고 시 에어백에 의한 안면부 손상특성)

  • Lee, Hee-Young;Lee, Kang-Hyun;Lee, Jung-Hun;Sung, Sil;Kang, Chan-Young;Kim, Ho-Jung;Kim, Sang-Chul;Youn, Young-Han
    • Journal of Auto-vehicle Safety Association
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    • v.8 no.3
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    • pp.10-15
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    • 2016
  • The purpose of this study is to evaluate the injury mechanism of facial injury related to an air-bag's deployment in occupant motor vehicle accident (MVA) by using Hospital Information System (HIS) and reconstruction program, based on the materials related to motor vehicle accidents. Among patients who visited the emergency department of Wonju Severance Christian Hospital due to motor vehicle accidents from August 2012 to February 2014, we collected data on patients with agreement for taking the damaged vehicle's photos. After obtaining the verbal consent from the patient, we asked about the cause of the accident, information on vehicle involved in the accident, and the location of car repair shop. The photos of the damaged vehicle were taken on the basis of front, rear, left side and right side. Damage to the vehicle was presented using the CDC code by analytical study of photo-images of the damaged vehicle, and a trauma score was used for medical examination of the severity of the patient's injury. Among the 309 patients with agreement for an investigation, thirty five (11.3 %) were the severe who had ISS over 15. And also, sixteen (5.2%) derived from the reconstructed data (maximum collision energy, maximum acceleration, delta V) by PC-Crash. As a result, ISS including the facial injuries was affected by the condition. It was high when the number of crash extent, the safety belt was not fastened, and the seating position of occupant and the direction of collision is same. For accurate analysis of the relationship between occupant injury and vehicle damage in MVAs, build-up of an in-depth database through carrying out various policies for motor vehicle accidents is necessary for sure.

Casestudy on Bumper Stay for Damageability & Repairability Improvement (손상성.수리성 향상을 위한 범퍼 스테이 사례 연구)

  • Chun, Young-Bum;Lee, Chong-Won
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.2
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    • pp.157-161
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    • 2005
  • In the FY 2003, the number of registered vehicles in Korea reached 14 million, which is 7.7% increase from the previous year. The increase of number of vehicles has caused a lot of social problem with enormous costs. The social costs related to the vehicles includes environmental costs resulting from pollution and scraping of vehicles, those resulting from life-saving and repairing from car accidents and so on. There have been m any efforts to reduce the social costs in m any areas. As a part of the efforts, there are recent grow ing interests on the damageability & repairability in related industries. In this study, we investigated the cases of two different types of bum per stay. Futhermore, we analyzed their effects on damageability & repairability and reduction of repair cost. So we found that if the manufacturers design new cars with good damageability & repairability, then the total repair cost in crash will be reduced.

A Study on Crash Analysis of Vehicle and Guardrail using a LS-DYNA Program (LS-DYNA 프로그램을 이용한 차량과 가드레일의 충돌해석에 관한 연구)

  • Kwon, O-Hyun;Baek, Se-Ryong;Yoon, Jun-Kyu;Lim, Jong-Han
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.16 no.3
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    • pp.179-186
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    • 2016
  • A study is to research crash barriers for vehicles that prevent road breakaway of vehicles and protect car passengers and pedestrians as absorbing impulse. Protection performance tests on vehicle passengers were simulated by using a LS-DYNA program. Through repetitive simulation on various speed and angles, passenger protection performance according to different impact condition was contemplated. Variable setting for the simulation was calculated as the mean weight of domestic car sales. By analyzing NASS (National Automotive Sampling System) of NHTSA (National Highway Traffic Safety Administration) of the U.S., the actual speed and collision angle section of accidents were computed. As a result, we confirmed that THIV (Theoretical Head Impact Velocity) and PHD (Post-impact Head Deceleration) are increased according to the impact speed and angle. Also, when the vehicle hit the guardrail post, we could be confirmed that the passenger protection performance greatly decreased.

Classifying Severity of Senior Driver Accidents In Capital Regions Based on Machine Learning Algorithms (머신러닝 기반의 수도권 지역 고령운전자 차대사람 사고심각도 분류 연구)

  • Kim, Seunghoon;Lym, Youngbin;Kim, Ki-Jung
    • Journal of Digital Convergence
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    • v.19 no.4
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    • pp.25-31
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    • 2021
  • Moving toward an aged society, traffic accidents involving elderly drivers have also attracted broader public attention. A rapid increase of senior involvement in crashes calls for developing appropriate crash-severity prediction models specific to senior drivers. In that regard, this study leverages machine learning (ML) algorithms so as to predict the severity of vehicle-pedestrian collisions induced by elderly drivers. Specifically, four ML algorithms (i.e., Logistic model, K-nearest Neighbor (KNN), Random Forest (RF), and Support Vector Machine (SVM)) have been developed and compared. Our results show that Logistic model and SVM have outperformed their rivals in terms of the overall prediction accuracy, while precision measure exhibits in favor of RF. We also clarify that driver education and technology development would be effective countermeasures against severity risks of senior driver-induced collisions. These allow us to support informed decision making for policymakers to enhance public safety.