Morandi chose a solution he had tested several times before on the Genoa-Savona highway and for the Salle bridge in Caramanico. The structural elegance of this solution is given by the contrast between the arch, visually strong and massive, and the forest of slender pillars that fit like pins into the concrete to support the deck.
The "pins" gradually increase in section going up, where a greater stiffness better contrasts the horizontal loads of the wind and braking. This peculiar shape consents to discard "unpleasant" upwinds.
The arch has three cells and was built in layers on a wooden centering supported by an Innocenti
scaffolding, which was shifted in order to build the twin arches (this method had already been used a few months earlier for the construction of the Aglio bridge, which sits further South).