Road Ledmozero - Kostomuksha - a section of the regional road Kochkoma - Ledmozero - Kostomuksha - the state border in Karelia. The highway connects the central regions of the republic and provides a link between the Kola highway and the state border with Finland.
In the 1970s Lengiprotrans developed a road project. During the same period, the institute designed the Ledmozero - Kostomuksha - state border railway line.
In 1976 the site was put into operation.
In December 1939, in connection with the outbreak of the Soviet-Finnish war, the Government of the USSR issued a task for the accelerated construction of the Petrozavodsk-Suoyarvi railway to transport equipment and food to the front line.
After receiving the order, within one day, 7 complex parties, consisting of employees of Lentransproekt (since 1951 - Lengiprotrans), went to the place of work. The surveys were carried out in difficult conditions: a short northern day, large snow cover, frosts of -40 degrees and more, periodic shelling from enemy aircraft.
Since the 1950s, Lengiprotrans has been developing a project for the West Karelian line, now part of the Oktyabrskaya railway. The transport development of the Karelian Autonomous Soviet Socialist Republic was necessary for the export of timber materials that were used to restore the national economy in the post-war years. The road was also of military-strategic importance, since it ran along the state border.
Since the 1950s, Lengiprotrans has been developing a project for the West Karelian line, now part of the Oktyabrskaya railway. The transport development of the Karelian Autonomous Soviet Socialist Republic was necessary for the export of timber materials that were used to restore the national economy in the post-war years. The road was also of military-strategic importance, since it ran along the state border.
The Novgorod - Smolensk line was designed as a link of the Leningrad (now St. Petersburg) - Orel railway, the construction of which began in pre-revolutionary times, but was suspended due to the First World War.
Surveys on the route were carried out in 1912, 1914, 1917, 1930–1931 and 1934. By 1935, the technical conditions, according to which the previous design and survey work were carried out, became obsolete. Lentransproekt (since 1951 - Lengiprotrans) was instructed to draw up a new complex technical project.
Vorkuta - Yugorskiy Shar is one of the northernmost objects of Lengiprotrans, completely located outside the Arctic Circle.
In the early 1930s, large reserves of coking coal were discovered in the Vorkuta region. In this regard, it was decided to build a railway line Vorkuta - Yugorsky Shar, which provided the shortest exit for exporting Vorkuta coals to the Barents Sea and further in the direction of Murmansk and Arkhangelsk.
Kotlas — Kozhva — Vorkuta railway line is a part of the North Pechora railway (since 1959 as part of the Northern Railway). The construction of the highway played an important role in supplying the country with fuel from the newly formed Vorkuta coal complex, especially during the occupation of Donbass during the Great Patriotic War. In the 1930s, Lentransproekt (since 1951 — Lengiprotrans) developed a project for the southern section of Konosha — Kotlas.
The Vyritsa — Orsha railway line is a section that is part of the Oktyabrskaya and Belorusskaya railways.
The project of the second tracks on the line was prepared by Lengiprotrans in the 1980s.
The Piskarevka - Ruchyi section is a connecting line of the Oktyabrskaya railway in the Kalininsky district of St. Petersburg.
In the late 1960s - early 1970s, according to the Lengiprotrans project, second tracks were built on the site in order to increase the capacity. This was also due to the construction of a road overpass in the alignment of Piskarevsky Prospekt above the station tracks in the early 1960s.
The Piskarevka - Rzhevka section is the connecting line of the Oktyabrskaya railway within the boundaries of St. Petersburg.
The single-track section Piskarevka - Rzhevka for a long time remained a "bottleneck" that impeded intensive commuter traffic. In 1986-1987, according to the Lengiprotrans project, the second main track was laid here. As a result, all railway approaches to Piskarevka station became double-tracked.
