International Journal of Highway Engineering (한국도로학회논문집)

Korean Society of Road Engineers (한국도로학회)
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Development of the U-turn Accident Model at 4-Legged Signalized Intersections in Urban Areas

도시부 4지 신호교차로 유턴 사고모형 개발

  • 강종호 (도로교통공단 울산경남지부) ;
  • 김경환 (경상대학교 도시공학과.환경및지역발전연구소) ;
  • 하만복 (경상대학교 환경및지역발전연구소) ;
  • 김성문 (경상대학교.BK21+ 창조형 중소도시재생 전문인력 양성사업팀)
  • Received : 2014.03.17
  • Accepted : 2014.03.24
  • Published : 2014.04.15
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Abstract

PURPOSES : The purpose of this study is to develop the U-turn accident model at 4-legged signalized intersections in urban areas. METHODS : In order to analyze the characteristics of the accidents which are associated with U-turn operation at 4-legged signalized intersections in urban areas and develop an U-turn accident model by regression analysis, the tests of overdispersion and zero-inflation are conducted about the dependent variables of number of accidents and EPDO (Equivalent Property Damage Only). RESULTS : As their results, the Poisson model fits best for number of accident and the ZIP (Zero Inflated Poisson) fits best for EPOD, the variables of conflict traffic, width of opposing road, traffic passing speed are adopted as independent variable for both models. The variables of number of bus berths and rate of U-turn signal time at which the U-turn is permitted are adopted as independent variable only for EPDO. CONCLUSIONS : These study results suggest that U-turn would be permitted at the intersection where the width of opposing road is wider than 11.9 meters, the passing vehicle speed is not high and U-turn operation is not hindered by the buses stopping at bus stops.

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References

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