Here, it is preferable that movement from the virtual image 461, 461′ to the virtual image 464, 464′ of the virtual vehicle is displayed at a speed being faster than an actual travel speed of the own vehicle. According to the above, the occupant is caused to evaluate necessity of cancelling of the lane change or switching to manual driving after the lane change is previously noticed until the timing of scheduled lane change to be performed by the automated driving control unit 7 of the automated driving system 2. Thus, time to spare can be kept for preparation if needed.