The 25 de Abril Bridge (, 25th of April Bridge, ) is a suspension bridge connecting the city of Lisbon, capital of Portugal, to the municipality of Almada on the left (south) bank of the Tagus River. It has a total length of , making it the 46th longest suspension bridge in the world. From its inauguration on 6 August 1966 up to 1974, the bridge was named Salazar Bridge (), after Portuguese Prime Minister António de Oliveira Salazar, who ordered its construction. After the Carnation Revolution, which overthrew the remnants of Salazar's regime, the bridge was renamed for April 25, the date of the revolution. It is also commonly called the Tagus River Bridge (in Portuguese: Ponte sobre o Tejo = "bridge over the Tagus"). Later changes had to be made due to the rapid increase in population. In the 1990s, a fifth car lane was added, and in 1999, a lower deck, used as a railway track, which was planned since the beginning, was finally built. Today, the upper deck carries six car lanes while the lower deck carries a double track railway, electrified at 25 kV AC. History Construction From the late 19th century, there had been proposals to build a bridge across the Tagus. In 1929, the idea advanced when the Portuguese engineer and entrepreneur, António Bello, requested a government concession for a railway crossing between Lisbon and Montijo (where the Vasco da Gama Bridge, the second bridge serving Lisbon, was later built in 1998). As a result, the Minister of Public Works, Duarte Pacheco, created a commission in 1933 to analyse the request. The commission reported in 1934, and proposed building a road and rail bridge. Bids were obtained, but the proposal was subsequently put aside in favor of a bridge crossing the river at Vila Franca de Xira, north of Lisbon. In 1953, a new government commission started work and, in 1958, recommended building the bridge, choosing the southern anchor point adjacent to the recently-built Christ the King monument (Cristo-Rei). In 1959, the international invitation to tender for the project received four bids. In 1960, the winner was announced as a consortium headed by the United States Steel Export Company, which had also submitted a bid in 1935. The American School of Lisbon was founded largely to educate the children of the American engineers brought to Portugal to work on the construction of the