Big Complicated Machines

The Amtrak Dock Vertical Lift Bridge

Dock_Bridge_-_Newark,_NJ

I don’t envy bridge designers. Bridges which cross shipping lanes, particularly those with large cargo ships, can often be an exercise in trade-offs. A suspension bridge soaring well over the water surface would be the preferred bridge, but they also require significant amounts of land on either side of the river that may not be there or available. So, other types of bridges are built. One of those bridges is called a vertical lift bridge. The entire road bed lifts to allow shipping to pass underneath.

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