Torrente Bisagno Viaduct, Highway viaduct in Genoa, Italy.

The Torrente Bisagno Viaduct is a motorway viaduct on the A12 (European route E80) inside Genoa, crossing the Bisagno valley at a height of about 70 metres. It is 593.35 metres long and consists of two separate parallel structures, one per carriageway, linked at the top by short beams. The eight spans include three main spans of 116 metres, two of 70 metres and three access spans of 36 metres on the Genoa side.

Commissioned by Società Autostrade, the viaduct was designed by engineers Silvano Zorzi and Sergio Tolaccia and built from 1966 to 1967 by the firm Moviter. The A12 section opened to traffic on 18 December 1967. In April 2020, maintenance work was announced for June, following repeated reports of poor condition; the renovation was planned in two phases totalling about 42 months.

The viaduct represents a period of substantial infrastructure development in Italy during the 1960s, when numerous large-scale transportation projects transformed the urban landscape.

The viaduct carries the A12/E80 on two separate decks, one per carriageway, each 9.80 m wide, so traffic runs in both directions high above the valley floor. It stands about 70 m above the Bisagno torrent, and the Veilino viaduct lies just to the west on the same stretch. Maintenance work announced in 2020 covered piers 3, 4 and 5 and the deck above the houses, with scaffolding required.

The three main spans, each 116 metres, were built with the Dywidag cantilever method, which needs no ground scaffolding and suits a valley floor already covered by buildings. The same method was used on the nearby Sori, Nervi and Veilino viaducts along the same A12 section.