The Tamar Bridge is a major road bridge over the River Tamar between Saltash, Cornwall and Plymouth, Devon in southwest England. It is 335 metres (1,099 ft) long, running adjacent to the Royal Albert Bridge, and part of the A38, a main road between the two counties.During the 20th century, there was increasing demand to replace or supplement the Saltash and Torpoint ferries, which could not cope with the rise in motor traffic.