Final architectural design has been developed by Sir. N. Foster, while final structural design has been developed by ARUP.

Railway Station has a dimension of 500x52m and has an underground structure of 25m depth: final design has modified erection methodology from bottom-up to top-down. Over ground part of the structure (to which 2 commercial levels are suspended) is composed by 172m span steel arches. Among preparatory design must be mentioned a double-bar underground hydraulic path 150m long, erected with the “push” technique under the rail.