CONTROL DEVICE AND CONTROL METHOD

The present invention is to obtain a control device and a control method capable of appropriately assisting driving of a straddle-type vehicle by a rider. In a control device () and a control method of the present invention, an acquisition section of the control device () configured to control an operation of a straddle-type vehicle () acquires prediction information about a future lane change by a preceding vehicle that travels ahead of the straddle-type vehicle (), and a control section of the control device () causes the straddle-type vehicle () to execute a safety operation (for example, causes a notification device () to issue a warning of the lane change to the rider), when the prediction information satisfies a determination criterion during a slipping-through traveling of the straddle-type vehicle ().