Driving support apparatus

1 . A driving support apparatus comprising:

a sensor configured to acquire environmental information about an external environment of a vehicle; and

a controller configured to execute a learning control for learning, as a learned behavior, a behavior of the vehicle that changes due to a manual operation performed during manual driving, and an automatic driving control for controlling the behavior of the vehicle to reproduce the learned behavior,

wherein,

the controller is configured to:

start a behavior control for controlling the behavior of the vehicle based on the learned behavior, when the vehicle arrives at a control start point during the automatic driving control, wherein the control start point is specified based on a start point at which the manual operation was performed during the manual driving and a preference of a user for the automatic driving control designated by the user;

when the manual operation performed during the automatic driving control satisfies an override condition, acquire a target value corresponding to an operation amount of the manual operation and control the behavior of the vehicle based on the acquired target value by outputting the target value to an actuator of the vehicle, and determine whether or not the manual operation is caused by the external environment; and

suggest to the user to change the preference, when it is determined that the manual operation is not caused by the external environment.

2 . The driving support apparatus according to claim 1 ,

wherein the controller is configured to determine that the manual operation is not caused by the external environment, when it is determined that there is no other vehicle around the vehicle based on the environmental information.

3 . The driving support apparatus according to claim 1 ,

wherein the preference is a preference relating to whether a start timing at which the behavior control starts is early or late, and

wherein,

the controller is configured to:

determine whether or not the manual operation is performed before the vehicle arrives at the control start point, when the manual operation satisfies the override condition and the manual operation is not caused by the external environment;

suggest to the user to change the preference so that the start timing is earlier, when the manual operation is performed before the vehicle arrives at the control start point; and

suggest to the user to change the preference so that the start timing is later, when the manual operation is performed after the vehicle arrives at the control start point.

4 . The driving support apparatus according to claim 1 ,

wherein,

the controller is configured to:

determine whether or not at least one of a first condition and a second condition is satisfied, when the manual operation satisfies the override condition and the manual operation is not caused by the external environment,

the first condition being a condition that is satisfied when another vehicle around the vehicle was present at a past time point at which the vehicle was located at a corresponding point which is the start point closest to a point at which the manual operation is performed,

the second condition being a condition that is satisfied when construction work was being conducted within a predetermined range from the corresponding point at the past time point; and

inquire the user whether or not to relearn the learned behavior, when at least one of the first condition and the second condition is satisfied.