What type of bridge is mentioned in the provided text?

A swing bridge is a type of movable bridge that rotates horizontally around a vertical axis to allow vessels to pass. The mechanism usually involves the bridge pivoting on a central point, and it is often used in locations where the clearance needed for navigation is significant but not enough to warrant a fixed bridge with a tall clearance. This design enables the bridge to accommodate water traffic while still providing a pathway for road or rail traffic when closed.

In examining the features that characterize a swing bridge, it becomes clear why this answer is appropriate. Swing bridges offer a practical solution in areas with varying water levels and frequent boat traffic, allowing for efficient and safe transit for both vehicles and vessels.

Options like a drawbridge, lift bridge, or cable-stayed bridge do not operate through a pivoting method but rather use different mechanisms to manage the elevation and opening processes for navigation. Each of these alternatives serves its own purpose but is distinct from the functionality of a swing bridge. Understanding these types helps delineate why the swing bridge is the correct type in this context.