Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Accident Analysis of 3-legged and 4-legged Roundabouts

3지와 4지 회전교차로의 사고분석

  • Park, Min-Kyu (Department of Urban Engineering, Chungbuk National University) ;
  • Park, Byung-Ho (Department of Urban Engineering, Chungbuk National University)
  • Received : 2012.01.25
  • Accepted : 2012.05.24
  • Published : 2012.06.30
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Abstract

This study deals with the accident of roundabout. The objective is to analyze the traffic accidents occurred in 3-legged and 4-legged roundabouts through the developed models. In developing the multiple linear regression models, this study uses the number of traffic accidents as a dependent variable and such the variables as geometric structures, traffic characters and others as the independent variables. The correlation and multicollinearity of variables were analyzed using SPSS17.0. The main results are as follows. First, R-square value of developed models were analyzed to be 0.851(3-leg) and 0.689(4-leg), respectively. Second, the independent variables in the 3-legged roundabout accident model were analyzed to be the traffic volume and number of crosswalk, and the variables in the 4-legged roundabouts were evaluated to be the traffic volume and signal. Finally, the paired t-test shows that the predicted values and observed values are not statistically different.

Keywords

References

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