The line connects four out of five Saint Petersburg's main railway stations.

In 1995, a flooding occurred in a tunnel between Lesnaya and Ploschad Muzhestva stations and, for nine years, the line was separated into two independent segments (the gap was connected by a shuttle bus route).

Two depots serve the line, Avtovo (№ 1) and Severnoe (№ 4), although when the lines separated in 1995 the Severnoe served the northern section whilst the Avtovo, along with other depots took over the southern section.

As there was a large surplus in the north, conventional railway was used to transfer many of the trains to other depots.

[citation needed] Debate continues over whether to open the controversial mosaic of Stalin (located on Narvskaya station behind the service room) to the public.