Determination apparatus and determination method

A determination method executed by a processor mounted on a host vehicle, the determination method comprising:

• acquiring a longitudinal distance, in a traveling direction of the host vehicle, between a preceding vehicle that the host vehicle is following and the host vehicle;
• judging whether or not the longitudinal distance is less than a determination distance corresponding to a maximum curvature at which the host vehicle can turn;
• and
• determining, as a target turning curvature, a curvature that is smaller than a predetermined curvature, if the longitudinal distance is less than the determination distance.

A determination apparatus comprising:

• a distance acquisition part that acquires a longitudinal distance, in a traveling direction of a host vehicle, between a preceding vehicle and the host vehicle;
• and
• a determination part that determines a target turning curvature of the host vehicle, wherein
• the determination part determines the target turning curvature on the basis of a first determination method if the longitudinal distance is equal to or greater than a determination distance, and determines the target turning curvature on the basis of a second determination method different from the first determination method if the longitudinal distance is less than the determination distance, and
• the target turning curvature determined on the basis of the second determination method is smaller than the target turning curvature determined on the basis of the first determination method.