For centuries, road users wishing to go from Saltash to Plymouth had two main options. Travel by coach involved a long detour north either to
Gunnislake New Bridge (a one-lane bridge constructed in 1520), or other bridges further north along the Devon – Cornwall border. The alternative was to catch a ferry across the Tamar. The Torpoint Ferry had been running successfully since 1791 (and is still in active service) while the
Saltash Ferry ran near to the bridge's present location. While popular, the ferries did not have sufficient capacity by the 20th century to cater for motor traffic. The idea for a fixed crossing across the Tamar had been floated around since the early 19th century, and proposals had been discussed in Parliament as early as 1930.
1950–1962: Construction In 1950,
Cornwall County Council and
Plymouth City Council discussed the feasibility of building a road bridge. The government was unenthusiastic about the idea, as they did not believe it was financially viable and there were more urgent projects in post-war Britain. After being rebuked, both councils agreed to self-fund the entire project, which would be paid for in tolls. The '''''' (
5 & 6 Eliz. 2. c. xxviii) received
royal assent in July 1957. Invitations to tender were sent on 4 March 1959, and a proposal from the northeast England-based
Cleveland Bridge & Engineering Company was accepted on 9 June. Preparatory work on the bridge started in July 1959. The bridge was built using suspended construction, which involved building two concrete towers with support cables over these. Hangers were attached to these cables and the road deck was transported by barge and lifted into place. Cleveland Bridge and Engineering later used the same technique to construct the first
Severn Bridge. The central span of the bridge was . The support cables were both long, with a combined weight of 850
tons. They were constructed for Cleveland Bridge and Engineering by British Ropes Ltd. The deck was made out of a concrete base covered with steel plates approx and of standard road
tarmac. The roadway catered for three lanes of traffic and was designed to be wide, with an additional for pedestrians either side of the bridge. The total cost of the bridge was £1.8 million (now £ million). although the original bridge was designed for 38-ton vehicles, it was only able to support 17-ton vehicles. A feasibility study was carried out for a new Tamar Crossing in 1991, but was rejected as the estimated cost would be around £300 million. The existing bridge could not be closed as it was being used by over 40,000 vehicles a day. The eventual solution was to add two additional
orthotropic cantilever lanes either side of the bridge, which traffic could run on while the original road deck was replaced. This was authorised by the '''''' (c. iv). The work was designed by
Hyder Consulting and constructed by the descendent company of Cleveland Bridge that had worked on the original project. Reconstruction started in 1999, and was slightly delayed owing to an influx of tourists travelling to Cornwall to watch the
solar eclipse of 11 August 1999, whose line of totality passed through the county. The new deck contained 82 orthotropic panels, each one measuring by and weighing 20 tons. Work was completed in December 2001 at a total cost of £34 million; the two additional lanes were retained to increase the bridge's capacity. The completed construction weighed 25 tons less than the original bridge. The Tamar Bridge was officially reopened by
Princess Anne on 26 April 2002, exactly forty years after the initial opening. Traffic was not expected to increase following the expansion of the bridge, as the
Saltash Tunnel further west acts as a buffer for capacity. It was the world's first
suspension bridge to be widened using
cantilevers, and the world's first suspension bridge to be widened and strengthened while remaining open to traffic. The project won the British Construction Industry
Civil Engineering Award for 2002, the Historic Structures category (30 years or older) of the Institution of Civil Engineers Awards 2002, and was one of eight finalists for the
Prime Minister's Better Public Building Award 2002. Bill Moreau, chief engineer of the
New York State Bridge Authority, was impressed by the project. He visited the bridge shortly after its reconstruction, and hoped that such methods could be possibly used to expand capacity on the three lane
Mid-Hudson Bridge across the Hudson River in upstate New York
2001–present In April 2022, a campaign pressure group known as the Tamar Toll Action Group was formed. The group has undertaken a number of peaceful protests with the goal to end tolls on both Tamar Crossings. In 2023, the Tamar Bridge Committee announced a hike in prices due to its losses upwards of £2 million per year. The proposal received a large number of complaints. In 2025, the Committee again announced a price rise via the Tamar Tag, the bridge's cashless payment discount scheme where drivers attach a device to their windscreen that automatically activates the toll gates. The committee approved the hike from 80p to £2, more than 150%, in early December. Councillors debated the increase later in the month, with one calling it "unjustified, unaffordable, undemocratic". Three Plymouth MPs wrote to the committee asking them to reconsider the price increase. A spokesperson for Tamar Crossings said charge has not increased from 80p since 2014, despite "significant rises" in running costs. The organisation claims that even with the proposed increase, the income will not cover the full cost of the scheme, and that drivers still get a discount on the toll charge. ==Legacy==