The road through the pass rises from Kranjska Gora in a series of 50 hairpin bends, traverses the top of the Vršič Pass, and descends into the Soča Valley. The upper elevations of the road are rendered impassable by heavy snowfall during much of winter. The road was greatly improved in late 1915 to supply the Isonzo Front of World War I, and it was originally named after Archduke Eugen of Austria-Hungary. The current name, Russian Road (), refers to the approximately ten thousand Russian prisoners of war used as laborers in the 1915 construction.