DRIVING ASSISTANCE DEVICE, DRIVING ASSISTANCE METHOD, AND STORAGE MEDIUM

At least one processor executes a first preliminary operation control process of notifying that an object is present when an indicator value is less than a second threshold and there is a travel path along which the vehicle is able to travel on one of left and right sides of the object and executes a second preliminary operation control process of notifying a driver when the indicator value is less than a third threshold and there is no travel path on both left and right sides of the object. The second preliminary operation or the first preliminary operation is executed when the indicator value is less than the third threshold, there is a travel path along which the vehicle is able to travel, and it is estimated that there is an interfering object in the travel path on the assumption that the vehicle has approached the object.