Next, description will be provided on screen displaying of prior notice of lane change to avoid an obstacle when the obstacle exists at a leading part of a scheduled travel course during travelling with automated driving. The automated driving control unit 7 of the automated driving system 2 can previously detect an obstacle existing on the scheduled travel course of the own vehicle based on images taken by the front camera 16 and/or information input from the information input unit 8 through radio communication with the outside such as vehicle-to-vehicle communication and road-to-vehicle communication described above.