Vehicular device and computer-readable non-transitory storage medium storing computer program

A vehicular device comprising:

• an eye opening degree determiner configured to determine a driver eye opening degree;
• a line-of-sight movement determiner configured to determine frequency of a driver line-of-sight movement;
• an operation determiner configured to determine a driver operation state for a driving operation instrument;
• a deviation determiner configured to determine a possibility that a driving state of a subject vehicle driver deviates from a safe driving state in a short cycle determination period and a long cycle determination period based on a determination result of the driver eye opening degree, a determination result of the frequency of the driver line-of-sight movement, a determination result of the driver operation state for the driving operation instrument;
• a vehicle inside notification controller configured to perform a notification operation for a vehicle inside;
• and
• a vehicle outside notification controller configured to perform a notification operation for a vehicle outside,
• wherein
• on a condition that a value indicating the possibility that the driving state of the subject vehicle driver deviates from the safe driving state exceeds a first determination value for the short cycle determination period and on a condition that a value indicating the possibility that the driving state of the subject vehicle driver deviates from the safe driving state exceeds the first determination value for the long cycle determination period, the vehicle inside notification controller is configured to perform the notification operation for notifying the vehicle inside that the value exceeds the first determination value, and
• on a condition that the value indicating the possibility that the driving state of the subject vehicle driver deviates from the safe driving state exceeds a second determination value higher than the first determination value for the long cycle determination period, the vehicle outside notification controller is configured to perform the notification operation for notifying the vehicle outside that the value exceeds the second determination value.