Driving support device for vehicle, driving support method for vehicle, and a non-transitory computer-readable storage medium storing a program for causing a computer

A driving support device for a vehicle, the driving support device comprising a control device configured to:

• execute automatic deceleration control for decelerating the vehicle when a specific condition indicating that a driver of the vehicle intends to turn the vehicle to right or left at an intersection present in front of the vehicle is satisfied, the specific condition including operation of a direction indicator for indicating a travel direction of the vehicle as a condition of satisfaction;
• continue, when the direction indicator stops operating during execution of the automatic deceleration control, the automatic deceleration control for a predetermined time period from a time point at which the direction indicator stops operating;
• and
• end the automatic deceleration control when the direction indicator continues to stop operating from the time point at which the direction indicator stops operating until the predetermined time period elapses, wherein the control device is configured to determine that the specific condition is satisfied when a distance from the vehicle to the intersection present in front of the vehicle is equal to or less than a predetermined distance, a required degree of acceleration is zero, and the direction indicator is operating;
• the driving support device further comprising:
• a front camera configured to photograph a landscape in front of the vehicle;
• and
• a vehicle speed sensor configured to detect a speed of the vehicle,
• wherein the control device is further configured to:
• search for a traffic light present in front of the vehicle by performing image processing on an image taken by the front camera, and calculate a distance from the vehicle to the traffic light when the traffic light is detected by the search;
• set the calculated distance from the vehicle to the traffic light as a distance from the vehicle to the intersection present in front of the vehicle at the current time point wherein, when the traffic light is no longer detected from the image taken by the front camera,
• calculate a distance from the vehicle to the traffic light at a current time point based on a distance from the vehicle to the traffic light calculated at a time point of last detection of the traffic light, a speed of the vehicle at the time point of the last detection of the traffic light, and an elapsed time from the time point of the last detection of the traffic light, and
• set the calculated distance from the vehicle to the traffic light as a distance from the vehicle to the intersection present in front of the vehicle at the current time point.