After determining to perform lane change from the overtaking lane 38 to the cruising lane 41, the automated driving control unit 7 of the automated driving system 2 instructs the display control unit 5 of the vehicle image display system 1 to display prior notice of the lane change. The display control unit 5 obtains, from the display information storing unit 6, image data necessary for displaying prior notice of the lane change. Then, the display control unit 5 performs necessary processes, so that the symbol images 44, 44′ and the virtual images 46, 46′ are generated and are transmitted to the first and second display devices 3, 4 to be displayed thereat.