Going under a bridge suggests delving into unconscious material; a need or fear of dealing with instinctual material. Crossing a bridge over water may be a way to avoid unconscious material or may symbolize using the intellect to arrive at a decision or behavior; sexual intercourse. A bridge can symbolize a need or willingness to: overcome obstacles; make a connection between one point or idea and another; make a transition between two conditions in your life (unite the past and present).

It can symbolize a crossroads or a decision you need to make. A collapsing bridge may represent repressed feelings, or can indicate that your psyche took some incident more seriously than you did consciously.

Consider how easy or difficult it is to cross the bridge and its condition (rocky or stable, small or narrow). Are you closing off alternatives you may need in the future (burning bridges behind you). Or are you avoiding a decision, waiting to cross a bridge.

A rainbow is a common symbol for bridging heaven and earth. Since a dream itself is a bridge between the conscious and unconscious, a bridge, or activity on the bridge, may symbolize your dreaming or dreamwork process.