If you dream about an accident this doesn't necessarily mean that it will happen in real life, however, do be cautious about these kind of things. If you have a history of dreaming about accidents before they happen then you should be cautious.
Accidents and traumatic events are sometimes the only way your subconscious can tell you that you something needs attention.
Examine your dream keeping the following questions in mind. Research all of the possibile scenarios your dream may be relaying to you.
Who is in the accident?
Who or what is causing the accident?
What tools are used to create the accident?
-->
