Narvskaya - Novy Port - a section of the St. Petersburg railway junction, is part of the Oktyabrskaya railway.
In the 1970s, according to the Lengiprotrans project, the line was equipped with automatic blocking.
Rybatskoye - Kupchinskaya is a section of the Southern Semicircle (also called the Second Port Branch) of the St. Petersburg railway junction, opened in 1930.
In the 1970s-1980s, according to the Lengiprotrans project, the railway was equipped with an automatic blocking system as part of the transfer to electric traction.
Glukhoozerskaya - Ruchyi - a section of the St. Petersburg - Vyborg direction of the Oktyabrskaya railway, located within the boundaries of St. Petersburg.
In the 1970s, according to the Lengiprotrans project, the line was equipped with automatic blocking.
Ruchyi - Pargolovo - a section of the St. Petersburg - Vyborg direction of the Oktyabrskaya railway.
In the 1970s, according to the Lengiprotrans project, the Leningrad-Sortirovochny-Moskovsky - Ruchi - Parnas - Pargolovo line was electrified with the aim of transferring freight traffic to electric traction. In the same period, the Ruchyi - Pargolovo section was equipped with automatic blocking.
Railway line Belomorsk - Sumskiy Posad - section of the Oktyabrskaya railway. The line runs along the coast of the Onega Bay in the north-east of the Republic of Karelia.
The line was electrified with 25 kV alternating current according to the Lengiprotrans project in 1994.
Railway line Perm - Balezino - section of the Kirov - Perm line of the Gorkovskaya railway.
The line was electrified according to the Lengiprotrans project in 1951-1959. On the tracks, a coded auto-blocking was installed. This made it possible to reduce the number of wires suspended on the signal lines, and thus to facilitate the maintenance of linear automatic blocking devices.
Mga - Nevdubstroy - nevdubstroy direction of the October railway.
The project for the electrification of the line was developed by Lengiprotrans in 1978 as part of the transfer to electric traction of the suburban railway sections of the St. Petersburg junction.
The railway line Gatchina - Siverskaya is a section of the Warsaw line of the Oktyabrskaya railway.
In 1966, according to the Lengiprotrans project, the line was electrified for direct current with a voltage of 3 kV. The project was developed as part of the transfer to electric traction of the suburban railway sections of the St. Petersburg junction.
In connection with the electrification of the Leningrad-Gatchina-Siverskaya line, the institute also designed the reconstruction of the Leningrad-Varshavsky station in 1960-1966.
The railway line Pavlovsk - Vyritsa - Poselok is a section of the Vitebsk line of the Oktyabrskaya railway.
The project for the electrification of the Leningrad-Pavlovsk section was developed by Lengiprotrans in 1953. Later, the institute designed the electrification of the Pavlovsk - Vyritsa - Poselok section. The line is electrified with DC voltage of 3 kV.
Railway line Piskarevka - Sosnovo - a section of the line St. Petersburg - Khiytola Priozersky direction of the Oktyabrskaya railway. The main line was built in the 1910s for transport links between St. Petersburg and the Karelian railway (Vyborg - Joensuu).
