After the Russian Revolution, several lines of the Moscow–Kazan and Syzran–Vyazma routes were added to the Syzran–Zlatoust Railway. The network was renamed after Valerian Kuybyshev in 1936 (as was the city of Samara). In 1989, the railway was the site of the worst train disaster in the history of the Soviet Union resulting in 575 deaths (see Ufa train disaster).