• Title, Summary, Keyword: Traffic accident

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A Study on the Acoustic Characteristic Analysis for Traffic Accident Detection at Intersection (교차로 교통사고 자동감지를 위한 사고음의 음향특성 분석)

  • Park, Mun-Soo;Kim, Jae-Yee;Go, Young-Gwon
    • Proceedings of the KIEE Conference
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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].

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A Case of Korean Medicine Treatment for a Patient with Somatic Symptom Disorder Hospitalized after a Traffic Accident

  • Hong, Min-Ho;Cho, Han-Byul;Kim, Man-Gi;Koo, Byung-Su;Kim, Geun-Woo
    • Journal of Oriental Neuropsychiatry
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    • v.32 no.1
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    • pp.67-79
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    • 2021
  • Objectives: The purpose of this study was to report the effect of Korean medicine treatment on a patient with somatic symptom disorder hospitalized after a traffic accident. Methods: The subject for this study was a patient diagnosed with somatic symptom disorder that worsened after a traffic accident. During hospitalization, herbal medicine, acupuncture, psychotherapy, and other treatments were performed. Clinical effect was evaluated using Heart Rate Variability (HRV), BDI (Beck Depression Inventory)-II, BAI (Beck Anxiety Inventory), Global assessment (G/A), and Numerical rating scale (NRS). Results: After 36 days of treatment, BDI-II score was reduced from 17 to 5. BAI score was reduced from 23 to 8. Overall somatic symptoms and pain showed decreases. Conclusions: Korean medicine treatment might be effective for somatic symptom disorder that is worsened after a traffic accident.

A Study on the Development of a Traffic Accident Ratio Model in Foggy Areas (안개지역의 교통사고심각도 모형개발에 관한 연구)

  • Lee, Soo-Il;Won, Jai-Mu;Ha, Oh-Keun
    • Journal of the Korean Society of Safety
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    • v.23 no.6
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    • pp.171-177
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    • 2008
  • As the risk of traffic accidents caused by mists emerged as a social problem, recently safety facilities to be prepared for mists are being actively installed when designing roads. But in some part, the facilities are being installed imprudently without analyzing the extent of occurrences of mists that would increase the risk of traffic accidents and appropriate countermeasures against the occurrences of mists are not being suggested. For that reason, in this study, first questionnaire surveys were executed on road users in order to draw the factors affecting the traffic accidents caused by mists, a mist traffic accident predicting model was developed and an accident seriousness determining model that can determine accident seriousness was developed. In this way, by extracting major factors affecting mist traffic accidents to grasp risk factors in roads to be caused by mists, safety of roads can be enhanced and traffic accidents in road operations can be decreased. As the affecting factors influencing mist traffic accidents, were extracted sightable distances, durations of mists and whether daytime or nighttime as major factors and the plan to install the facilities for the prevention of mist traffic accidents was suggested to prevent the traffic accidents to be caused by those factors and also the plan to operate roads considering sightable distances was suggested to solve the problem of insufficient sightable distances to be caused by mists was suggested. It is judged that the road safety in the areas where mists occur can be improved through foregoing methods.

Traffic Accident Model of Roundabout based on Type of Land Use (토지이용 유형별 회전교차로 교통사고모형)

  • Lee, Min Yeong;Park, Byung Ho
    • International Journal of Highway Engineering
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    • v.18 no.6
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    • pp.153-160
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    • 2016
  • OBJECTIVES : The objective of this study is to develop a traffic accident model of a roundabout based on the type of land use. METHODS : The traffic accident data from 2010 to 2014 were collected from the "traffic accident analysis system (TAAS)" data set of the Road Traffic Authority. A multiple linear regression model was utilized in this study to analyze the accidents based on the type of land use. Variables such as geometry and traffic volume were used to develop the accident models based on the type of land use. RESULTS : The main results are as follows. First, the null hypothesis that the type of land use does not affect the number of accidents is rejected. Second, four accident models based on the type of land use have been developed, which are statistically significant (high $R^2$ values). Finally, the total entering and circulating volumes, area of the central island, number of speed breakers, mean number of entry lanes, diameter of the inscribed circle, mean width of the entry lane, area of the roundabout, bus stops, and number of circulatory roadways are analyzed to see how they affect the accident for each type of land use. CONCLUSIONS : The development of the accident models based on the type of land use has revealed that the accident factors at a roundabout are different for each case. Thus, more speed breakers in commercial areas and an inscribed circle of proper diameter in commercial and residential areas are determined to be important for reducing the number of accidents. Additionally, expanding the width of the entry lanes, decreasing the area of the roundabouts in residential areas, and reducing the conflict factors such as bus stops in green spaces are determined to be important.

Study on Adopting EDR Report for Traffic Accident Analysis (교통사고분석에서 EDR 기록정보의 채택에 관한 고찰)

  • Park, Jongjin;Park, Jeongman;Lee, Yeonsub
    • Journal of Auto-vehicle Safety Association
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    • v.12 no.3
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    • pp.52-60
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    • 2020
  • Usage of EDR(Event Data Recorder) report for traffic accident analysis is currently increasing due to government regulation of EDR data release. Nevertheless, a lot of investigators simply adopt by comparing the number of ignition cycles(crash) at event to the number of ignition cycles(download) without an exact judgment whether event data occurred by this accident or not. In the EDR report, besides ignition cycles, there are many factors such as event record type, algorithm active(rear/rollover/side/frontal), time between events, event severity status(rollover/rear/right side/reft side/frontal), belt switch circuit status, driver/passenger pretensioner/air-bag deployment, PDOF(Principal Direction of Force) by ΔV to be able to decide whether or not to adopt. also the event data is considered enough to vehicle damaged state, accident situation at the scene of the accident. and there is described in "all data should be examined in conjunction with other available physical evidence from the vehicle and scene" in the CDR(Crash Data Retrieval) report. Therefore many investigators have to decide whether or not to adopt after they consider sufficiently to above factors when they are the traffic accident analysis and investigate the causes of a accident on the adopted event data. In this paper, we report to traffic accident investigators notable points and analysis methods on the basis of thousands of cases and the results of one's own experiment in NFS(National Forensic Service).

Development of Accident Modification Factors for Road Design Safety Evaluation Algorithm of Rural Intersections (지방부 교차로의 도로설계 안전성 판단 알고리즘 구축을 위한 AMF 개발 (신호교차로를 중심으로))

  • Kim, Eung-Cheol;Lee, Dong-Min;Choe, Eun-Jin;Kim, Do-Hun
    • Journal of Korean Society of Transportation
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    • v.27 no.3
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    • pp.91-102
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    • 2009
  • A traffic accident prediction model developed using various design variables(road design variables, geometric variables, and traffic environmental variables) is one of the most important factors to safety design evaluation system for roads. However, statistical accident models have a crucial problem not applicable for all intersections. To make up this problem, this study developed AMFs(Accident Modification Factors) through statistical modeling methods, historical accident databases, judgment from traffic experts, and literature review by considering design variable's characteristics, traffic accident rates, and traffic accident frequency. AMFs developed in this study include exclusive left-turn lane, exclusive right-turn lane, sight distance, and intersection angle. Predictabilities of the developed AMFs and the existing accident prediction models are compared with real accident historical data. The results showed that performances of the developed AMFs are superior to the existing statistical accident prediction models. These findings show that AMFs should be considered as a important process to develop safety design evaluation algorithms. Additionally, AMFs could be used as an index that can judge the impact of corresponding design variables on accidents in rural intersections.

Development of Traffic Accident Forecasting Models Considering Urban-Transportation System Characteristics (토지이용 및 교통특성을 반영한 교통사고 예측모형 개발 연구)

  • Park, Jun-Tae;Jang, Il-Jun;Son, Ui-Yeong;Lee, Su-Beom
    • Journal of Korean Society of Transportation
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    • v.29 no.6
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    • pp.39-56
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    • 2011
  • This study proposed a traffic accident prediction model developed based on administrative districts of Seoul. The model was to find the relationship between accident rates and the representative land usage of the districts (development density) - the higher the development density (building floor area) is, the higher the traffic accident rate is. The findings showed that traffic accident statistics differ from (1) residential building floor area, (2) commercial building floor area and (3) business building floor area.

Analysis of Traffic Accident by Circular Intersection Type in Korea Using Count Data Model (가산자료 모형을 이용한 국내 원형교차로 유형별 교통사고 분석)

  • Kim, Tae Yang;Lee, Min Yeong;Park, Byung Ho
    • Journal of the Korean Society of Safety
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    • v.32 no.5
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    • pp.129-134
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    • 2017
  • This study aims to develop the traffic accident models by circular intersection type using count data model. The number of accident, the number of fatal and injured persons(FSI), and EPDO are calculated from the traffic accident data of TAAS. The circular intersection accident models are developed through Poisson and negative binomial regression analysis. The main results of this study are as follows. First, the null hypotheses that there are differences in the number of traffic accidents, FSI and EPDO by type of circular intersections are rejected. Second, the scale of intersection(median, large), number of approach road, mean width and length of exit road, area of the circulating roadway and central island are selected as factors influencing the number of traffic accidents, FSI and EPDO in rotary. Third, the scale of intersection(median), guide signs(limited speed, direction, roundabout), number of approach road, entry angle, area of the intersection and central island are adopted as factors influencing the number of traffic accidents, FSI and EPDO in roundabout. Finally, transferring from rotary to roundabout could be expected to make the accident decrease.

Acupuncture for Rehabilitation in Patients with Traffic Accident in South Korea: a Systematic Review (국내 교통사고 후유증의 침치료에 대한 체계적 문헌고찰)

  • Kim, Kun-Hyung;Nam, Dong-Woo;Kang, Jung-Won;Lee, Jae-Dong;Choi, Do-Young
    • Journal of Acupuncture Research
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    • v.27 no.1
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    • pp.21-29
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    • 2010
  • Objectives : This study aims to evaluate current clinical evidence of acupuncture treatment for rehabilitation in patients with traffic accident in South Korea. Methods : Seven Korean databases were searched for prospective clinical trials for acupuncture on rehabilitation in patients with traffic accident from their inception to June, 2009. Only studies conducted in Korean language were searched. Risk of bias in included randomized controlled trials were assessed by Cochrane Handbook procedure. Results : Fifteen clinical trials were included among 31 studies searched. Eight were observational studies, five were non-randomizedcontrolled trials, and two were randomized controlled trials. In all of included studies, acupuncture were conducted with other concomitant treatment. Included studies dealt with such conditions as neck pain, low back pain tinnitus after traffic accident, post-traumatic stress, oculomotor nerve palsy, diplopia and insomnia. All of included studies reported favorable effects of acupuncture group compared to baseline or control group. All of included studies lacked the occurrence of adverse events. High risk of bias were observed in two randomized controlled trials. Conclusions : There is no evidence that acupuncture is effective for rehabilitation of traffic accident. All of included studies lacked appropriate methodological qualities and internal validity. Future welldesigned clinical trials that evaluate the effects and safety of acupuncture treatment for rehabilitation in patients with traffic accident is needed.