Abstract: This study aimed to explore the effect of apologetic vehicle signal on drivers' anger. 618 drivers were tested with the situation questionnaire. This study adopted a single-factor inter-group design, in which the independent variables were divided into two levels: the vehicle signal group and the non-vehicle signal group. And the dependent variables were the anger score and the responsibility inference score of each situation. The results show that the scores of drivers responsibility inference and the anger are significantly reduced in the situation of apologetic vehicle signal. Regression analysis shows that the more drivers responsibility inference to aggressive drivers, the more anger they would have. This shows that drivers who use apologetic vehicle signal can obviously reduce other drivershostile responsibility referring to them and decrease their anger. The apologetic vehicle signal has a significant effect on the drivers' anger, and they restrain drivers' score of anger.

Key words: apologetic vehicle signal, driversanger, responsibility referring