CONTROL DEVICE

An object is to display an image related to transportation guidance in a way easily viewable to a driver. A control section controls a projection device configured to project an image onto a windshield of a vehicle so that the image is displayed superimposed on a real view. The control section includes a projection control section configured to cause, in a case where a driving lane of the vehicle is a reduced lane, the projection device to project a guidance image for prompting a lane change. The reduced lane is a lane on which it becomes impossible for the vehicle to run within a predetermined distance ahead of a current location of the vehicle on a traveling route of the vehicle.