A system includes a first notifying unit, a detection unit, and a second notifying unit. The first notifying unit performs a first notification for notifying a target in a predetermined area of an abnormality, in a case where an abnormal state occurs in a running vehicle. The detection unit detects presence of a target unaware of the first notification. The second notifying unit performs a second notification for notifying the target in the predetermined area of the abnormality, in a case where the presence of the target unaware of the first notification is detected.