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Systems already exist that reduce collision damage through collision-danger alarms and by operating such features as pre-tensioning seat belts and collision mitigation brakes when the system has determined the possibility of a collision by using millimeter-wave radar. Conversely, at present, carelessness in observing oncoming traffic accounts for a large percentage of head-on collisions. Timely collision warnings are effective in avoiding accidents and for mitigating the severity of the collision. However, warnings given too early even before the driver has had a chance to carry out normal evasive maneuvers, can annoy the driver. Accordingly, by adding a driver face direction sensor, the authors have developed in the present research a system that will only hasten the timing of warnings when the system has detected the direction of the driver's face and determined that they are not facing the front of the vehicle.