An information display device mountable on a vehicle, a vehicle apparatus, and a method for displaying an image to a driver of a vehicle. The information display device includes a controller configured to display information including information display related to a route along which the vehicle is to travel as a virtual image in a display area, and alter properties and characteristics of the information display being displayed in the display area. Alternatively, the controller is configured to display information including information display related to a route along which the vehicle is to travel as a virtual image in a display area, and switch between showing and hiding the information display being displayed in the display area. The vehicle apparatus includes the information display device and a vehicle on which the information display device is mounted.