If dreamed you that you became the witness of collision, then in real life you should show extreme care not to fall a victim of accident. For the young woman the collision dreamed symbolizes the hard choice between two worthy admirers.
Subject: Action
Look also: Difficulties Quarrels Fight Sword Family
The word Collision or its synonyms meet in oneiromancy: Scientist Whale Car
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.