North Railway between Vila Franca de Xira and Azambuja. Four viaducts with a total extension of 1330m, in prestressed concrete with span lengths of 40m and total lengths of 316m, 306m, 410.5m and 306m. The viaducts foundations consist of 30m long piles. Services Provided: Preliminary Study, Final Design and Technical Assistance. Owner: REFER, EPE.