Viaducto Avellaneda, Road bridge in Rosario, Argentina.

The Avellaneda Viaduct, officially Viaducto Ingeniero Emigdio Pinasco, is a road overpass on Bulevar Avellaneda above the Patio Parada yard of the General Bartolomé Mitre Railway in Rosario. It carries vehicles, pedestrians and cyclists over the tracks, linking the city centre with the northern districts.

Construction of the viaduct took place between 1968 and 1972, following agreements among the Municipality of Rosario, Argentine Railways, and the Santa Fe provincial government. The project arose from the need to create a new connection between separated areas of the city.

Opened in 1972, the viaduct took its name from Bulevar Avellaneda, the avenue it crosses. In 1991, municipal ordinance 5224 renamed it Ingeniero Emigdio Pinasco, honouring the man who had served several terms as president of the Rosario Engineers Association. Locals still commonly call it Viaducto Avellaneda.

The viaduct carries Bulevar Avellaneda over the Patio Parada yard of the General Bartolomé Mitre Railway, linking Rosario's centre with its northern districts. Before the mid-20th century the only crossings there were the Celedonio Escalada passage and the Cruce Alberdi, so this is the direct route for traffic heading north.

Before the viaduct was built, only two connections existed between the northern and central parts of the city: the Celedonio Escalada passage and the Alberdi crossing. This structure fundamentally transformed how people could move across the city.