ABSTRACT
This study is based on various situations acquired by Event Data Recorders in a zone of interest, with a bend where several losses of control were reported in the past. The hypothesis is to consider that the noise of the lateral acceleration signal increases with the loss of control risk. This noise was quantified in the bend by two methods for 116 recordings, from normal driving passages to critical situations called incidents. In the most difficult part of the bend, the noise of incidents is superior to normal passages for both calculation methods, showing that the vehicles come closer to their grip limits. Moreover, the noise of lateral acceleration is then higher near the triggering than in the whole bend. Thus, this criterion is useful to evaluate the loss of control risk and the severity of incidents. This approach is complementary to other researches taking into account the vehicle dynamics.
