sentences:  By 1954, public works were initiated on the bridge under the direction of engineer Edgar Cardoso, who extended the decks and removed the electrification of the deck.In 1982, the bridge was designated a cultural heritage "Imóvel de Interesse Público" ("Property of Public Interest") by national agency IGESPAR, the Portuguese "Institute for the Management of Architectural and Archaeological Heritage".On 27 June 2003, the upper deck was closed to motor traffic in order to adapt the structure for the metro system.