Editing Swing bridge (section)

==Advantages==
[[File:I Street Bridge Sacramento.jpg|alt=The swing span turned to allow a boat to pass|thumb|right|250px|I Street swing Bridge span turned to allow a boat to pass Sacramento California]]

[[File:BNSF Bridge 9.6 swing span turned.jpg|thumb|right|250px|[[Burlington Northern Railroad Bridge 9.6|BNSF Railroad Bridge 9.6]] across the [[Columbia River]] in [[Portland, Oregon]], showing the swing-span section turning.]]
* As this type requires no counterweights, the complete weight is significantly reduced as compared to other moveable bridges.
* Where the channel is wide enough for separate traffic directions on each side, the likelihood of vessel-to-vessel collisions is reduced.
* The central support is often mounted upon a [[berm]] along the axis of the watercourse, intended to protect the bridge from watercraft collisions when it is opened. This artificial island forms an excellent construction area for building the moveable [[span (engineering)|span]], as the construction will not impede traffic.