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ABSTRACTThe urban highway, which is a motorway constructed to solve traffic issues, has the characteristic of extremely high damage to life during traffic accidents because the speed of vehicles is higher than typical roadwa ys. In particular, because traffic accident s involving serious injuries hold a very important place among overall traffic accidents, analysis on factors affecting the occurrence of traffic accidents involving serious injuries must be considered with priority when establishing a reduction measure. Therefore, the stu dy built a model that was capable of distinguishing the degree of the factors as part of microscopic analysis for investigating the comp lex effect of many elements concerning the occurrence of traffic accidents involving serious injuries in urban highways. The results are a s follows. First, discriminant model showed a comparatively high level in overall accuracy rates, and, considering the correlation ratio, the models were determined to be valid, as all characteristics of the factors were clearly distinguished. Second, the problems of traffic accidents involving serious injuries on urban highways according to each factor, were clearly drawn out through the discriminant model. Third, the improvement measure for the problems drawn out from the discriminant models were clearly proposed.Key words : Urban highway, Serious injuries, Traffic accident, Microscopic analysis, Discriminant model                                ,                                .                          ,     . ,      ,         ,      . ,            . ,           . : , , , , Transportation Engineering

A Study on the Analysis of Urban Highways Traffic Accident's Impact Factors Based on Building Discriminant Models- In Busan Metropolitan City -