Construction and first years

In 1869, the Kaiserlich-königliche privilegierte Kronprinz Rudolf-Bahn Gesellschaft (KRB, Imperial and Royal privileged company of the Crown Prince Rudolf railway), that had been formed for the construction and operation of the Rudolfsbahn railway line from St. Valentin to Tarvisio, received the concession to build a railway line linking Tarvisio and Ljubljana. The projected railway would follow the Sava valley from Ljubljana to Assling (now Jesenice) and Kronau (Kranjska Gora), then reach Tarvisio through Fusine in Valromana.^[2]

The railway line was opened on 14 December 1870.^[3][4]

In the first years of service, the end station in Tarvisio was located in an area south-west of the current Tarvisio Boscoverde station. A new station, the current Tarvisio Centrale, was opened when the railway line from Villach was inaugurated in 1873, and the Ljubljana line was connected to it,^[4] leading to disaffection of the first station, who was then known as Alt Tarvis (Old Tarvisio).^[3]

In 1884, following financial crisis of the KRB, the railway was nationalised. It was therefore operated by the Imperial Royal Austrian State Railways, who proceeded to modernise the line.^[2]

In 1906, the station of Jesenice became a junction when two segments of the New Alpine Railways met there: the Bohinj Railway to Trieste and the Karawanks Railway to Villach. As the latter opened two months later, during a brief period, the trans-alpine trains from Villach to Trieste used the Tarvisio–Ljubljana line between Tarvisio and Jesenice.

Between the two World Wars

Following the Treaty of Saint-Germain-en-Laye, the railway was divided between Italy and the new Kingdom of Serbs, Croats and Slovenes (Yugoslavia from 1929). The lined crossed the border near the station of Fusine Laghi. The end station of Tarvis, rebaptised Tarvisio Sobborghi, then Tarvisio Centrale by its new owner, the Italian State Railways (FS), became an international border station. Both passenger and goods traffic between Tarvisio and the border was operated by the National Railways of the Kingdom of Serbs, Croats and Slovenes, that would become the Yugoslav Railways (JDŽ), but the infrastructure were owned and managed by the FS. Beyond the border, the JDŽ had both ownership and operation of the line.^[3]

After World War II

After World War II, and following the consequent closing of the Yugoslav border, traffic strongly decreased on the Italian segment of the line, and stopped completely in 1965. A presidential decree officially closed the line on 14 August 1967.^[5] The tracks were removed in the 1980s. The Yugoslav segment between Jesenice and the border was officially closed in 1969. In recent years, part of the path in the Slovenian Upper Sava Valley has been reclaimed as a bicycle trail.