A bridge in a dream usually marks a transition -- the point where you're moving from one state of life into another and need something to carry you across. Crossing it easily can reflect readiness for that change, while a bridge that sways or won't hold your weight often names hesitation about the decision itself.
There will many wars and difficulties happen, when in a revolutional figure of the world, Saturn and Jupiter shall be in their exaltations. - William Lilly (1602.-1681.)