The Autostrada A4, or Serenissima, is a motorway which connects Turin and Trieste via Milan and Venice. The city of Venice (or rather, Mestre which is the "land" part 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.
Due to the different companies that manage the different parts of the motorway, it is often referred to as formed by five sections: Turin-Milan, Milan-Brescia, Brescia-Padua, Padua-Venice and Venice-Trieste. As it runs through the whole Pianura Padana, which is a densely populated and highly industrialized area, A4 is one of the most trafficked motorways of Italy.
Source:
https://en.wikipedia.org/wiki/Autostrada_A4_(Italy)
Duino Sud is the last gas station of A4 motorway, every year many tourists pass through here on their way to Slovenia, Croatia and other more distant countries.
This cache offers you the opportunity to register a "found it!" in Italy if you are headed east and perhaps to exchange a small trackable 