Autostrada A4 (Italy)

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Autostrada A4
Autostrada Serenissima
Serenissima motorway
Route information
Part of E55, E64 and E70
Maintained by ANAS
Length523.1 km (325.0 mi)
Existed1927–present
Major junctions
West endTurin
Major intersections A55 in Turin
A5 in Borgo d'Ale
A26 in Greggio
A50 and A52 in Rho
A8 in Pero
A51 in Carugate
A58 in Agrate Brianza
A35 in Ospitaletto
A21 in Brescia
A22 in Verona
A31 in Vicenza
A13 in Padova
A57 in Venice
A27 in Preganziol
A28 in Santo Stino di Livenza
A23 in San Giorgio di Nogaro
A34 in Palmanova
RA13 in Sistiana
East endTrieste
Location
CountryItaly
RegionsPiedmont, Lombardy, Veneto, Friuli-Venezia Giulia
Highway system
A 3 A 5

The Autostrada A4, or Autostrada Serenissima ("Serenissima motorway"), is an autostrada (Italian for "motorway") 523.1 kilometres (325.0 mi) long in Italy located in the regions of Piedmont, Lombardy, Veneto and Friuli-Venezia Giulia which connects Turin and Trieste via Milan and Venice crossing the entire Po Valley from west to east.

The city of Venice (or rather, Mestre, a mainland frazione of Venice) originally formed a bottleneck on the A4, but is now bypassed by the Passante di Mestre (the old route through Mestre was renumbered A57). The A4 passes just north of the city of Milan, where it is toll-free. It is a part of the E55, E64 and E70 European routes.