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The Study on the Accident Injury Severity Using Ordered Probit Model  

Ha, Oh-Keun (한국교통연구원)
Oh, Ju-Taek (한국교통연구원)
Won, Jai-Mu (한양대학교 도시대학원)
Sung, Nak-Moon (한국교통연구원)
Publication Information
Journal of Korean Society of Transportation / v.23, no.4, 2005 , pp. 47-55 More about this Journal
Abstract
In recent years, the rapid growth of vehicles have increased traffic crashes. Since they can cause the economic losses and have put the life qualify in danger, there should be numerous efforts to reduce traffic crashes. To reduce traffic crashes, this research seeks to improve the safety of intersections by analysing causations of injury severity with Ordered Probability Model. This research applied the Ordered Probit Model, which assumes that ${\epsilon}_i$(random error) is normally distributed, for model calibration and used $p^2$ (likelihood ratio) and $x^2$ (Chi-square) for model selection. The results show that minor road traffic, heavy vehicle rates, major and minor right-turn rates, presence of lightings, speed limits, instructive line for left-turn traffic are significant factors affecting crash severities at signalized intersections.
Keywords
교차로;교통사고;사고심각도;순서형 확률모형;순서형 프로빗 모형;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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