Tay Road Bridge Tay Road Bridge The Tay Road Bridge carries the A92 road across the Firth of Tay from Newport-on-Tay in Fife to Dundee in Scotland, just downstream of the Tay Rail Bridge. At around , it is one of the longest road bridges in Europe, and was opened in 1966, replacing the old Tay ferry. As part of the modernisation projects of the 1950s, a road bridge across the Tay had been considered for several years. In August 1958 a traffic census and test bores were taken to locate the most suitable crossing for the bridge. The bridge was designed by
Tay Bridge disaster were now constructed by sinking brick-lined wrought-iron caissons onto the riverbed, and filling these with concrete. To reduce the weight these had to support, Bouch used open-lattice iron skeleton piers: each pier had multiple cast-iron columns taking the weight of the bridging girders. Wrought iron horizontal braces and diagonal tiebars linked the columns in each pier to provide rigidity and stability. The basic concept was well known, but for the Tay Bridge, the pier dimensions were constrained by the caisson. For the higher portion of the bridge, there were 13 girder spans. In order to accommodate thermal expansion, at only