An information processing unit displays a pop-up window in a display area of a display unit when the own vehicle is in an area of a set distance or less away from an extracted intersection, when the own vehicle stops, when a brake switch is ON, and when a display request for an image of traffic conditions of vehicles at the intersection by the driver is recognized. If an accelerator operation is performed in a predetermined way after the pop-up window is displayed, the display of the pop-up window is finished.