[1] It opened in January 1986, becoming the eleventh Metro in the USSR and the ninth in the Russian SFSR.
According to 2017 statistics, it is the third-busiest system in Russia behind Moscow and Saint Petersburg.
Work quickly expanded to meet the original plans for a four-line 62 km network.
There is also one station with side platforms (Rechnoy Vokzal) that is both above- and below-ground that follows a 2145 m covered bridge span of the Ob, the longest in the world.
Krasny Prospekt and Sibirskaya are transfer stations connected to each other by dual pedestrian tunnel.