Abstract
Illegal direction change is accounted the highest ratio for road accident causes in Hochiminh City, Vietnam. Illegal direction change is examined through separate behavioral models such theory of planned behavior, health belief model and integrated behavior model. Integrated behavior model including health belief model, theory of planned behavior variables and extended socio-cognitive variables is identified to be one of the best model (with the highest percentage of total variance) that is for applying predictive illegal direction behavior not only for HCMC but also for other cities and provinces of Vietnam. The high significant variables of the integrated behavior model as behavioral intention, perceived benefits, subjective norm and perceived severity are selected to propose the appropriate community campaigns of road safety.
