wherein the display control unit is configured to generate a second symbol image indicating an unscheduled travel course deviating from the scheduled travel course based on the travel information of the own vehicle and an instruction received from the automated driving control unit when the automated driving control unit is trying to cause the own vehicle to perform the unscheduled travel behavior, and to control the display device to display the second symbol image on the screen in which the second symbol image is superimposed on the first symbol image,