The 25 de Abril 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 was inaugurated on August 6, 1966. It is often compared to the Golden Gate Bridge in San Francisco, because they are both suspension bridges of similar color. It was built by the American Bridge Company which constructed the San Francisco–Oakland Bay Bridge but not the Golden Gate. With a total length of 2,277 metres (7,470 ft), it is the 43rd largest suspension bridge in the world.

The upper deck carries six car lanes while the lower deck carries a double track railway, electrified at 25 kV AC. The lower deck was added in 1999.

From 1966–1974, the bridge was named Salazar Bridge (Ponte Salazar) in honor of Portuguese Prime Minister António de Oliveira Salazar who ordered its construction. Twenty workers died during its construction, many more than were announced at the time. After the Carnation Revolution, which overthrew the remnants of Salazar’s dictatorship, the bridge was renamed for April 25, the date of the revolution. It is also sometimes called the Tagus River Bridge or, in Portuguese, Ponte sobre o Tejo (“bridge over the Tagus”).

ACCESSES

South Bank : The accesses are connected to the A2 motorway and the Almada and Costa da Caparica branches of the IC20

North Bank : Os acessos têm ligação com o Eixo Norte-Sul, Praça de Espanha, Amoreiras, auto-estrada A5 e Alcântara.

Toll Plaza: It is located on the southern bank of the Tagus river at Almada in the Almada-Lisbon direction. The toll plaza has 16 toll lanes, six of which are automatic: 2 ViaCard and 4 Via Verdes. Lanes 15 and 16 only serve public transport between 07:00 and 10:00 am.