| 1966 – present|
Province of Udine
| A4 in Palmanova|
| International E-road network|Autostrada A23 (Italy) Wikipedia
The Autostrada A23 is an Italian motorway, which connects the A4 motorway (Turin–Trieste) near Palmanova via Udine to Tarvisio and the Austrian Süd Autobahn (A2).
Part of the European route E55, the toll road is one of the main transport links between Northeast Italy and Central Europe.