Transporter bridge

Transporter bridge

An animation showing how a transporter bridge operates with vehicular, pedestrian and shipping traffic
Material	Steel
Movable	Yes

A transporter bridge, also known as a ferry bridge or aerial transfer bridge, is a type of movable bridge that carries a segment of roadway across a river. The gondola is slung from a tall span by wires or a metal frame. The design has been used to cross navigable rivers or other bodies of water, where there is a requirement for ship traffic to be able to pass. This has been a rare type of bridge, with fewer than two dozen built. There are just twelve that continue to be used today. These include the Aerial Bridge in Duluth, Minnesota, which has been converted into a lift bridge, and one designed as, but not yet operating as, a transporter bridge.^{[clarification needed]}