Driving assist device

A driving assist device mounted in a vehicle to assist a driver in driving the vehicle through detecting a state of the driver, the vehicle being switchable between

• a manual driving state in which driving operations for acceleration, braking and steering are manually performed by the driver and
• an automated driving state in which at least one of the driving operations is performed automatically,
• the driving assist device comprising:
• a driver state detection unit that detects whether the state of the driver is an inattentive state;
• an alerting unit that, when the inattentive state of the driver is detected, alerts the driver;
• a driving operation unit that is operated by the driver to perform the driving operations;
• and
• a driving state switching unit that, when the driver's operation of the driving operation unit is detected during the automated driving state of the vehicle, switches at least one of the driving operations in the automated driving state to the manual driving state,
• wherein:
• when at least one of the driving operations in the automated driving state is switched to the manual driving state by the driving state switching unit, the driver state detection unit detects whether the state of the driver is an excited state;
• and
• when the excited state of the driver is detected, the alerting unit alerts the driver.