By / In Historic Buildings/ On
Transporter bridges are high bridges which support a moving platform, or gondola, from above, like an overhead crane. They were a cost effective way of spanning a river while ensuring the river remained open to traffic. They were built near the mouths of rivers where the surrounding land was low. A standard bridge would have required long, and expensive, approach ramps to raise the roadway high above the river. The design of the transporter bridge removes the need for such ramps.