Moveable bridges

thumb|Animation showing the operation of a drawbridge A drawbridge or draw-bridge is a type of moveable bridge typically at the entrance to a castle or tower surrounded by a moat. In some forms of English, including American English, the word drawbridge commonly refers to all types of moveable bridges, such as bascule bridges, vertical-lift bridges and swing bridges, but this article concerns the narrower historical definition where the bridge is used in a defensive structure.

enclosed movable bridge which extends from an airport terminal gate to an airplane

bridge that moves to allow passage, usually of watercraft

bridge in London

movable bridge that lowers the bridge deck below the water level to permit waterborne traffic to use the waterway

Ukrainian bridge

moveable bridge

movable bridge in which the deck can be rolled or slid backwards to open a gap while crossing traffic

moveable bridge which rotates about fixed endpoints rather than lifting or bending