The symbol image 44′ is formed as an arrow mark extending from a position on an overtaking lane 38′ in the taken scenery 39 to a position on an adjacent cruising lane 45′ being an aimed lane. The arrow of the symbol image 44″ starts from a front end of the picture image 40 of the own vehicle and is curved along a trajectory on which the own vehicle is previously noticed to travel with automated driving. Similarly to the symbol images 44, 44′, it is preferable that the symbol image 44″ is displayed in a color and/or brightness different from the color and/or brightness of the symbol images 37, 37′ to be distinctively recognizable.