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http://dx.doi.org/10.7470/jkst.2012.30.5.003

Simultaneous Equation Models for Evaluating Roundabout Accidents According to Different Driving Types  

Kim, Kyung Hwan (Department of Urban Engineering, Chungbuk National University)
Park, Byung Ho (Department of Urban Engineering, Chungbuk National University)
Publication Information
Journal of Korean Society of Transportation / v.30, no.5, 2012 , pp. 3-10 More about this Journal
Abstract
This study dealt with traffic accidents occurring within roundabouts. The objective was to develop roundabout accident models for different driving types by using simultaneous equations. In pursuing the above, this study used a statistical program SPSS 17.0 to accommodate data from 148 accidents occurred within 39 roundabouts of Korea. In addition, the 2SLS(2 stage least square) estimation method was adopted to calibrate the models. The main results are as follows. First, both the number of accidents and the EPDO were evaluated to have bilateral relationships. Second, all 6 different simultaneous equation models according to driving types were found to be statistically significant. Third, the developed models were compared to each other with respect to either common or specific variables. Finally, variables such as ADT, conflicting rate, heavy vehicle ratio, circulatory roadway width, number of circulatory roadway lane, approach lane width, average approach lanes, parking places, and bus stops were selected as independent variables for the models.
Keywords
Accident Model; Driving Type; Roundabout; Simultaneous Equation; 2SLS(2 Stage Least Square;
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Times Cited By KSCI : 5  (Citation Analysis)
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