To explain the vision it could go several ways. First, it could be an actual car accident where this person will be killed in. In this case the person had the control, the automobile if taken in this context means this person and his soul is on the wrong path and has become part of the dark side or has become part of the fires of hell with the way they are living, in deep sin. In most cases this dream vision can pertain to both and in reality with the life of darkness this person is living they will be killed in a fiery car accident to symbolize the violence and darkness they incorporated in their life. The old adage is that when you are violent or hurt others karma brings it back to you and this is the way you die.
Visions usually can either be pieces of a puzzle or like a moving picture show.
In visions you can be an observer or a participant. They can be of future events, and warnings or of the past. Many psychic who have these gifts and can use their visions, help the police, FBI, individual people and so on. But the problem here is two fold. One if the person who has these visions warns people, they think they are nuts, they don't take them seriously, or they think they are the cause of what will happen.