Abstract
This study aims to propose the warning system for preventing overturning accidents. By considering the overturning mechanism, this study shows three parameters, crosswind velocity, direction and vehicle velocity, are necessary for preventing accidents. Predicted value for crosswind can be obtained by using the short-term prediction method. With this value and the correcting method of wind fluctuation characteristics using up-crossing rate, the system can judge whether accidents may occur. Finally this system will provide the warning information about decreasing vehicle velocity for drivers before passing strong crosswind area.