The Autostrada A23 or Autostrada Alpe-Adria ("Alps-Adria motorway") is an autostrada (Italian for "motorway") long in Italy located in the region of Friuli-Venezia Giulia which connects the Autostrada A4 (TurinâÂÂTrieste) near Palmanova via Udine to Tarvisio and the Austrian A2 Süd Autobahn. It is a part of the E55 European route. The Autostrada A23 is one of the main transport links between Northeast Italy and Central Europe.
The first section between Palmanova and Udine (13 km) was opened on 30 July 1966. The section from Udine to Carnia-Tolmezzo (34 km) opened on 26 July 1979 and the section from Carnia-Tolmezzo to Austrian border (60 km) on 3 July 1986. The Udine bypass (13 km) opened on 11 June 1988.