A bridge is for spanning a divide and as such in dreams it suggests you need a reconciliation of different aspects of yourself. For example, dreams of bridges can be triggered if you are thinking of leaving work to start out on your own but are troubled by issues of confidence.
Bridges can also indicate reconciliation with others. In this case you are likely to know of the waking life issue and the person or persons involved. However, it is common to dream of the people with whom reconciliation is required. Sometimes the relevant person is shown in symbolic form. John dreamt he was trying to hurry across a rope bridge while meteorites were falling. His path was blocked by a man coming in the opposite direction. In this dream the man represents John’s father, a man whom John feels has obstructed his path in life. The dream is telling John that in order to move forward he must reconcile a clash of ideals (indicated by meteorites falling) with his father.
Bridges can also indicate a transition. While on a bridge you are neither where the bridge starts nor where it leads to. It is common for these dreams to occur when going through a transition between stages of your life or doing some therapeutic work on yourself that will lead to a positive outcome.
Lastly a bridge can indicate that you have a counseling ability. The first rule of interpretation is that you are everything in the dream. If you are a bridge your special ability is to help people span a divide which symbolically indicates reconciliation of issues whether with themselves or with others.