Journal of Korean Society of Transportation (대한교통학회지)

Korean Society of Transportation (대한교통학회)
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Analysis of Contributory Factors in Causing Crashes at Rural Unsignalized intersections Based on Statistical Modeling

지방부 무신호교차로 교통사고의 영향요인 분석 및 통계적 모형 개발

  • PARK, Jeong Soon (Traffic Science Institute, Korea Road Traffic Authority) ;
  • OH, Ju Taek (Department of Urban Engineering, Korea National University of Transportation) ;
  • OH, Sang Jin (Chungbuk Research Institute) ;
  • KIM, Young Jun (Traffic Science Institute, Korea Road Traffic Authority)
  • 박정순 (도로교통공단 교통과학연구원) ;
  • 오주택 (한국교통대학교 도시공학과) ;
  • 오상진 (충북발전연구원) ;
  • 김영준 (도로교통공단 교통과학연구원)
  • Received : 2015.10.19
  • Accepted : 2016.02.18
  • Published : 2016.04.30
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Abstract

Traffic accident at intersections takes 44.3% of total number of accidents on entire road network of Korea in 2014. Although several studies addressed contributory factors of accidents at signalized intersection, very few is known about the factors at rural unsignalized intersections. The objective of this study is therefore to investigate specific characteristics of crashes at rural unsignalized intersection and to identify contributory factors in causing crashes by statistical approach using the Ordered Logistic Regression Model. The results show that main type of car crashes at unsignalized intersection during the daytime is T-bone crashes and the number of crashes at 4-legged intersections are 1.53 times more than that at 3-legged intersections. Most collisions are caused by negligence of drivers and violation of Right of Way. Based upon the analysis, accident severity is modeled as classified by two types such as 3-legged intersection and 4-legged intersection. It shows that contributory factors in causing crashes at rural unsignalized intersections are poor sight distance problem, average daily traffic, time of day(night, or day), angle of intersection, ratio of heavy vehicles, number of traffic violations at intersection, and number of lanes on minor street.

교차로는 국가 도로체계에 있어서 작은 부분을 차지하고 있지만, 2014년 통계에 따르면 교차로 교통사고는 전체 교통사고의 약 44.3%를 차지하고 있다. 이에 신호교차로에 대한 연구는 지속적으로 수행되고 있는 반면에, 무신호교차로에 대한 연구는 아직도 미진한 상태이다. 따라서 본 연구의 목적은 지방부 무신호교차로 교통사고의 특성분석과 순서형 로지스틱 모형을 이용한 사고 심각도의 영향요인을 파악하는 것이다. 무신호교차로의 교통사고들은 대부분 주간시간에 측면직각 충돌에 발생하였으며 4지 무신호교차로의 교통사고가 3지 무신호교차로에 비해 약 1.53배 많이 발생하였다. 교통사고의 주요 원인들은 운전자의 안전운전불이행 및 교차로 통행방법 위반에 의해 발생한 것으로 나타났다. 사고 심각도 모형의 개발 결과, 지방부 무신호교차로의 2가지 형태(3-지, 4-지)와 3개의 모형식이 개발되었다. 주요 영향요인으로 교차로 시거 장애, 일평균교통량, 주야간시간대, 교차각, 중차량 비율, 교통법규위반 및 부도로 차로수 등이 선정되었다.

Keywords

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