 Due to new political divisions in Europe, with the dissolution of Austria-Hungary into separate states in 1918 and the isolation of communist Yugoslavia after 1945, the railway decreased in importance during the twentieth century.However, Slovenia's accession to the European Union has created new prospects for the railway as a convenient passenger and freight route from Central and Eastern Europe to the port of Trieste.Distinctive features of the railway are the -long Bohinj Tunnel under high Mount Kobla and the Solkan Bridge with its wide arch over the Soča River.