• Proceedings of the KOR-KST Conference
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• 1998.10a
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• pp.361-369
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• 1998

교통사고의 형태가 점차 복잡하고 대형화되면서, 물적·인적손실도 예전과는 비교할 수 없게 커지고 있다. 교통사고는 당사자와 그 가족에게는 지울 수 없는 상처를 남기고, 국가적으로도 국력낭비라는 문제점을 만든다. 교통사고를 줄이기 위해서는 개별 교통사고에 대한 철저한 조사와 교통사고 잦은 지역에 대한 분석이 필수적이다. 이러한 분석을 바탕으로 철저한 조사와 교통사고 잦은 지역에 대한 분석이 필수적이다. 이러한 분석을 바탕으로 교통안전시설물의 개5js 및 보간, 부적절한 도로 개선 등 교통사고 방지를 위한 효율적인 대책을 수립할 수 있게 된다. 교통사고 발생지점 자료의 미비로 인하여 사고지점 및 노선 축별 분석이 불가능한 현재의 문제점을 해결하기 위하여 지리정보 시스템(GIS)을 이용한 효율적인 지점별 교통사고 분석이 요구된다. 지리정보시스템 (GIS)을 이용하게 되면, 특정지점의 교통사고에 관련된 발생건수, 사고유형, 사고내용, 발생시기 등 여러 가지 교통사고 정보를 관리하고, 교통사고 잦은 지점의 환경적요인 등을 분석함으로서 교통사고를 미연에 방지하기 위한 의사결정을 지원할 수 있다. 본 연구는 GIS를 활용하여 급증하는 교통사고에 관련된 다양한 교통사고 정보를 효율적으로 전산 관리하고, 교통사고 잦은 지점 및 사고발생 원인 등을 분석할 수 있는 시스템 개발에 목적이 있으며, 특히 개발된 시스템은 교통사고 실무담당자 활용에 편의를 도모하는데 주안점을 두었다.

• Journal of Korean Society of Transportation
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• v.27 no.3
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• pp.81-90
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• 2009

The safety management of a road network comprises four basic inter-related components：identification of sites(black spot) requiring safety investigation, diagnosis of safety problems, selection of feasible treatments for potential treatment candidates, and prioritization of treatments given limited budgets(Persaud, 2001). Identification process of selecting black spot is very important for efficient investigation of sites. In this study, the accident prediction model for EB method was developed by using accident data and geometric conditions of black spots selected from four-leg signalized intersections in In-cheon City for three years (2004-2006). In addition, by comparing the rank nomination technique using EB method to that by using accident counts, we managed to show the problems which the existing method have and the necessity for developing rational prediction model. As a result, in terms of total number of accidents, both the counts predicted by existing non-linear regression model and that by EB method have high good of fitness, but EB method, considering both the accident counts by sites and total number of accident, has better good of fitness than non-linear poison model. According to the result of the comparison of ranks nominated for treatment between two methods, the rank for treatment of almost sites does not change but SeoHae intersection and a few other intersections have significant changes in their rank. This shows that, with the technique proposed in the study, the RTM problem caused by using real accident counts can be overcome.

• 한국도로학회지:도로
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• v.7 no.4 s.26
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• pp.21-26
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• 2005

• Journal of Korean Society of Transportation
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• v.22 no.5
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• pp.47-57
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• 2004

This study introduces the areawide road safety improvement program, which was developed to overcome the weak points of conventional black spot improvement programs. The latter has been criticized in terms of that it can cause the problem of accident migration and that it prevents from identifying causes of road accident in the comprehensive scope. On the other hand, the areawide road safety improvement program can allow us to find the route or areas that have quite a number of road accidents with the common causes. Therefore, we can take countermeasures effectively in a different framework in this approach. This study explains in detail about the concept, procedures, and effects of areawide road safety improvement programs including the example. This study may contribute to bringing a new framework of road safety improvement program in Korea.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.22 no.1
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• pp.16-24
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• 2023

Accidents are greatly reduced through projects to improve frequent traffic accidents. These results show that safety facilities play a big role. Traffic accidents are caused by various causes and various environmental factors, and it is difficult to achieve improvement effects by installing one safety facility or facilities without standards. Therefore, this study analyzed the improvement effect of each accident type by combining the two safety facilities, and suggested a method of predicting the combination of safety facilities suitable for a specific point, including environmental factors such as road type, road type, and traffic. The prediction was carried out by selecting an XGBoost technique that creates one strong prediction model by combining prediction models that can be simple classification. Through this, safety facilities that have had positive effects through improvement projects and safety facilities to be installed at points in need of improvement were derived, and safety facilities effect analysis and prediction methods for future installation points were presented.

• Journal of Korean Society of Transportation
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• v.35 no.2
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• pp.129-142
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• 2017

Accident Black Spot Improvement Project is the representative road safety intervention to eliminate environmental risk factors on the roadway by installing road safety facilities. Although it is one of the main road safety projects in Korea, there has been a lack of effort analyzing the traffic accident reduction effects of this project. In this study, therefore, we selected 4,171 road black spots from 2004 to 2013 and investigated the traffic accident reduction effects of 5 road safety facilities by using "Comparison Group(C-G)" method. Through the analysis, it was found that the number of traffic accidents were lowered by 4.45% with traffic islands, 32.17% with road paved markers, and 24.13% with speed cameras, respectively. However, 0.61% with pedestrian fencing and 1.67% with skid resistant pavement were increased on the other hand. In addition, we also analyzed traffic accident reduction facilities' performance on specific types of collision mentioned in manual on road safety facilities by Ministry of Land, Infrastructure and Transport. It was shown that the number of bad weather traffic accidents were reduced by 52.96% with road paved markers, pedestrians accidents were reduced by 62.77% with pedestrian fencing and rear-end collisions were reduced by 26.00% with skid resistant pavement.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.7
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• pp.4634-4643
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• 2014

The objective of this study was to analyze the effects of LED safety block using the government database. To evaluate these effects, the night accident data was obtained from 2007 to 2011 from the database. At the LED-installed area, compared to the uninstalled area, the number of night traffic accidents, injured and mortality had decreased by 26.2%, 21.2% and 38.3%, respectively. The LED-installed intersections are safer than the LED-uninstalled roads from a traffic accidents perspective. In conclusion, a LED safety block is quite effective in decreasing the number of traffic accidents. Although this study was conducted using the data from Changwon city, where LED safety blocks have been installed so far, these results can provide valuable data to other cities considering the implementation of these LED safety blocks.

• Journal of Korean Society of Transportation
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• v.24 no.4 s.90
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• pp.31-42
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• 2006

The purpose of this study is to compare the effectiveness of road safety features by spatial scope Spot & Section-based safety Improvement project. Empirical data was collected from black-spot study of Jeonbuk and "Traffic Safety Improvement Project on National Highway 17". Evaluation model of effectiveness was developed by using Empirical Bayes (EB) method. And Relative Effectiveness was measured by Odds Ratio. The result indicates that Section-based safety improvement was $7.09{\sim}77.27%$ more effective than the spot-based. It means that section-based improvement projects should be expanded while considering the characteristics of the section in spot based improvement.

• Journal of Korean Society of Transportation
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• v.29 no.1
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• pp.103-111
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• 2011

To evaluate highway safety countermeasures or identify high risk sites, the expected crashes for a site (or segment) have been estimated using the panel crash data. Past studies show that two different methods can be employed to estimate the expected crashes: observed crash based method and empirical Bayes (EB) method. This study conducts a simulation study to analyze how the estimation errors of the two estimates are affected by the different structures of the panel crash data and the presence of the change in safety over time. The results disclose that the estimation errors of the observed crash based estimates (i.e. the mean observed crash and comparative parallel estimate) are always greater than those of the EB estimates regardless of the structure of the panel crash data and the presence of the change in safety over time. Thus, it is highly recommended that the EB method be used in the study of traffic safety to obtain more reliable estimates for the expected crashes. In addition, this study corroborates that the estimation errors of the two estimates decrease as the analysis periods increase if safety does not change over time. Hence, it is also recommended that the 1-year analysis period used for identifying high risk sites in Korea be extended to produce more efficient estimates of the time-constant expected crashes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.1
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• pp.374-388
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• 2016

In Jeju-Do, there is the 1100 Road, 516 Road, and Bijarimro, which are typical mountain sight-seeing roads in Jeju. These roads are local roads that have been the location for many traffic accidents. This study focused on these roads, categorized the type of traffic accident and analyzed the accident characteristics. The major accident factors were analyzed through trip AHP analysis, Comparative analysis of the velocity distribution and the factors affecting traffic accidents were analyzed. Tourists took many trips on these roads. The mixing rate of the rental cars was 36.70%~71.60% in 1100 road and Bijarimro. Currently, these local roads are regulated by a speed limit of 60km/h. However, it might be necessary to reduce the speed limit to 40km/h considering the geometric line form of the road and the climate in these areas. The speed limit of more than 40km/h is found 87.0% on 516 Roads, 88.57% on 1100 roads, and 93.1% on Bjarimro, In these roads, the speed ratio is higher as described above. Therefore, these roads have been found to have a higher risk of traffic accidents by overspeeding driving. The overspeed driving ratio of these roads was 87.0%~93.1%, The overspeed driving enforcement method at one spot has only the effect of reducing the speed at that enforcement place; the effect cannot be expected for the other places or sections. It is necessary to introduce a section overspeed driving enforcement system utilizing the average velocity in these areas to prevent traffic accidents.