Aerial lift bridges are specialized structures designed to allow ships to pass beneath them while providing a roadway for vehicles above. These bridges feature a movable section that can be raised or lowered, typically using a system of cables and pulleys. When a vessel approaches, the bridge lifts to create a clear passage, ensuring safe navigation. One of the most famous examples of an aerial lift bridge is the Duluth-Superior Aerial Lift Bridge in Minnesota. Built in 1905, it connects the cities of Duluth and Superior and is a vital transportation link, as well as a popular tourist attraction.