The front windshield 15 may be divided into several display areas to use the entire surface or a part thereof as the first display device 3. For example, as illustrated in FIG. 4A, a main display area 31 is defined as a wide view area including a center section of the front windshield 15 to project an image that is superimposed to actual scenery viewed through the front windshield 15. As described later, the main display area 31 is used for displaying an image indicating a scheduled travel course on a road during travelling of the automobile 14 with automated driving and an image providing prior notice of an unscheduled travel behavior such as travelling of the automobile 14 as deviating from a scheduled travel course, for example, for lane change.