Transporter bridge
Fifteen Transporter Bridges have been built, of which seven remain. Their use is to carry a moveable roadway across a navigable river slung from a span tall enough to allow traffic to pass on the river.
The Newport transporter bridge was built in 1906 across the River Usk. Because the river banks are very low at the desired crossing point (a few miles south of the city centre) a bridge would needed a very long approach ramp and a ferry could not be used at low tide.
The Middlesbrough Transporter Bridge is another famous example.
Photographs: The Newport Transporter Bridge
