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카노(KANO)모델을 이용한 어린이보호구역 안전시설 기능 도출
나호혁,강지혜,김도경 대한교통학회 2021 대한교통학회 학술대회지 Vol.85 No.-
교통사고 관련 연구는 도로의 안전성 향상 및 교통사고 감소를 위해 교통사고에 영향을 미치는 요인들을 분석하고 사고예측 모형을 개발하여 왔다. 지금까지 교통사고 관련 연구는 주로 교차로 중심으로 진행되었으며, 가로구간에 대한 교통사고 연구로 확대되어 왔다. 최근 국내에서는 신호교차로와 비교하여 지체감소, 용량 및 안정성 증가 등의 운영효과를 가진 회전교차로의 도입이 적극 추진되고 있으며, 용량 분석 및 서비스분석이 활발히 진행되고 있다. 또한 회전교차로의 안정성 향상을 위한 교통사고 관련 연구도 활발히 이루어지고 있다. 그러나 회전교차로의 용량 및 운영효과 분석에 비해 교통사고에 대한 연구는 아직까지 미비한 실정이다. 이에 이 연구는 국내 회전교차로의 교통사고를 운전유형별로 구분하여 사고특성을 분석하고, 사고건수와 EPDO(Equivalent Property Damage Only)의 상호관계를 고려하여 연립방정식 모형을 개발하는데 그 목적을 두고 있다. 또한 연립방정식 모형을 사용함에 따라 사고건수와 EPDO에 영향을 미치는 요인들을 비교분석하고자 한다.
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카노(KANO)모델을 이용한 어린이보호구역 안전시설 기능 도출
나호혁(NA, Hohyuk),강지혜(KANG, Jihye),김도경(KIM, Do-Gyeong) 대한교통학회 2022 대한교통학회지 Vol.40 No.3
어린이보호구역은 어린이의 안전을 위해 속도저감, 보호구역 알림, 무단횡단 및 주정차 금지기능 등을 가진 다양한 안전시설이 설치되고 있다. 그러나 이런 노력에도 불구하고 어린이 보호구역 내 사고건수는 지속적인 증가추세를 보이고 있어 어린이보호구역에 설치되는 안전시설의 기능이 제대로 발휘되고 있는지에 대한 제고가 필요한 상황이다. 본 연구에서는 상품기획 분야에서 주로 사용되는 분석기법인 카노(KANO)모델과 고객만족계수를 사용하여, 어린이보호구역에서의 안전성을 증진시키기 위해 필요한 가장 기본적이고 필수적인 시설물이 무엇인지를 고찰해보고자 한다. 일반인 운전자 172명을 대상으로 실시된 인터넷 기반 설문조사를 통해 총 18개의 도로 및 교통안전시설을 역품질 요소를 제외한 4가지의 품질요소로 구분하였다. 그 결과 3개의 매력적 요소, 7개의 당연적 요소, 3개의 일원적 요소, 그리고 5개의 무관심 요소로 구분되었으며, 역품질 요소로 구분된 시설은 없는 것으로 나타났다. 그 후 당연적 요소 및 일원적 요소로 분류된 총 10개의 도로 및 교통안전시설을 대상으로 시설물별 중요도를 도출하기 위해 고객만족계수를 적용하였고, 중요도가 높다고 판단된 상위 3개 시설은 속도제한표지판, 신호 및 과속단속카메라, 어린이보호구역 노면표시인 것으로 나타났다. 본 연구를 통해 어린이보호구역 내 어린이 안전성을 증진시키기 위해 필요한 가장 기본적이고 필수적인 안전시설을 도출할 수 있었으며, 개별 안전시설의 우선순위 또한 결정할 수 있었다. 이런 결과는 향후 안전개선사업에 투자할 예산이 제약된 상황에서 한정된 예산을 효율적으로 투자하여 어린이보호구역의 안전성을 향상시키는데 도움이 될 것으로 기대된다. The number of accidents occurred in school zones continues to increase despite the fact that school zones are protected with various safety facilities for the purpose of enhancing the safety of children, indicating that the functions of safety facilities installed in school zones need to be reconsider in terms of enhancing safety. With new analytical techniques such as KANO model and Customer Satisfaction Coefficients, which are widely used in the field of product planning, this study aims to discover some implications for installing safety facilities to efficiently reduce crash frequencies. Eighteen safety facilities were classified into four quality elements based on web-based survey data obtained from 172 drivers: three Attractive element, seven Must-be element, three One-dimensional element, and five Indifferent element. After that, the importance of 10 safety facilities classified into Must-be element and One-dimensional element were analyzed through Customer Satisfaction Coefficients. The top three facilities with the highest importance were found to be speed limit signs, enforcement cameras, and road markings for school zones. The major findings of this study are as follows: the most fundamental and essential safety facilities necessary for the proper functioning of the school zones to enhance children’s safety were identified and the priority of essential safety facilities were determined. These findings might be expected to enable us to install safety facilities efficiently in a budget constrained environment.
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겨울철 도시부 노면결빙사고 발생에 미치는 요소에 관한 연구
김상엽,장영수,김성규,민동찬,나호혁,최재성 한국도로학회 2015 한국도로학회논문집 Vol.17 No.2
PURPOSES: According to accident statistics for road built in 2004, the ratio of accidents on frozen roads to normal roads is 0.9%, whereas the fatality ratio is 2.7%. The risk of accidents on frozen roads is very high. Measures taken every year to prevent traffic accidents of frozen roads in the winter season are still insufficient. Additionally, measures have been established mainly on rural roads. Therefore, for urban roads, analyses and measures to prevent accidents are lacking. In this study, data on accidents on frozen roads was used to search for the causes behind these accidents and measures to reduce accidents have been recommended. METHODS: In this study, collected data from the TAMS (Traffic Accident Management System), which were collected by the Seoul National Police Agency was used. The data were divided into vehicle, people, and condition of road. The analytical model used here was the Logistic Regression Model, which is frequently used for traffic safety and accident analysis. This study uses the odds ratio analysis to search for variables related to frozen road traffic accidents in each category. A total of 18 out of 47 variables were found to be the causes of accidents. RESULTS: From the results of the comparative analysis of 18 variables, the category of the condition of the road was found to be the most critical. Contrary to expectations, more accidents occurred in clear weather than in other conditions. Accidents on bridges occurred frequently, and its odds ratio was the highest compared with other road types. When BPT is operated, the probability of accidents on frozen roads is lower than in general conditions, and accidents occurred frequently on roads with less than four lanes. CONCLUSIONS : Based on the results of this study, suggestions for reducing the risk of future domestic road accidents in freezing conditions are indicated as follows. First, it is necessary to perform a technical review of the urban road traffic accidents caused by frozen roads. Second, it is necessary to establish criteria for the study of the road environment based on the major causes of road accidents on frozen roads. Third, improvements in urban road environmental factors should be made.
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디지털 기반 어린이보호구역 표지판의 속도감소 유도 효과 분석
강지혜,나호혁,백주용,김도경 한국도로학회 2022 한국도로학회논문집 Vol.24 No.5
PURPOSES : Speed management is essential for enhancing children’s safety in school zones. The objectives of this study are to analyze how digital-based school zone signs and newly proposed signage for increasing visibility influence speed reductions and how the new system facilitates drivers obeying the speed limits. METHODS : A before/after analysis technique with comparison groups (widely used to evaluate safety effects) was employed. To effectively capture the safety effects of the new system, two significant measures were selected as the measures of effectiveness: the rates of change in space mean speeds and speed limit compliance. RESULTS : With three target sites and three comparison sites, the mean space speeds after installing the new systems were found to be slightly reduced for all target sites (the reduction rates of the space mean speed were found to be 5% for site A, 1% for site B, and 6% for site C). The lack of a constant tendency in speed reduction effects at all sites might be owing to the fact that the speed data collection was conducted before the driver's system adaptation was sufficiently performed. Regarding the speed limit compliance rate, significant increases were observed at two sites (10% for site A and 51% for site C), but site B did not show an increasing effect. The reason for the absence of this effect is that the installation of crosswalks and speed bumps at the target site affected the driver's compliance with the speed limit. CONCLUSIONS : An insufficient amount of evaluation results was obtained for the new guidance system. However, the new guidance system method provides an alternative approach to improving children's safety, i.e., by inducing drivers to actively slow down in school zones.
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