In the 1990s, the electrification of railway tracks in the North-West of Russia was widely developed, in which Lengiprotrans took an active part. The work began with the design of the Volkhovstroy - Svir section of the Oktyabrskaya railway. This marked a new stage in the electrification of the route to Murmansk.
In the 1990s, the electrification of railway tracks in the North-West of Russia was widely developed, in which Lengiprotrans took an active part. As part of this work, the Idel - Belomorsk section was electrified using alternating current.
In the course of the work, two traction substations, a longitudinal contact network, a signaling system, and power supply were designed.
In the 1990s, the electrification of railway tracks in the North-West of Russia was widely developed, in which Lengiprotrans took an active part. At the final stage of the electrification of the Northern Direction, the Idel - Svir section was designed with an alternating current of 27.5 kV. This became the final section of the electrification of the St. Petersburg - Murmansk direction of the Oktyabrskaya railway.
Babaevo is an out-of-class railway station on the Vologda — St. Petersburg line of the Oktyabrskaya Railway. By the nature of the work, the station is a precinct one, and by its volume and complexity it is extracurricular. In 1990–2000, Lengiprotrans in several stages developed a project for the reconstruction of the station in view of an increase in transit freight traffic along the Volkhovstroy — Koshta line.
In the 1960s Lengiprotrans developed a project for a railway station in Arkhangelsk. The building is located in the city center at the Arkhangelsk-Gorod station of the Northern Railway.
The building was designed on the right bank of the Northern Dvina River, in the immediate vicinity of the city. Such an opportunity arose in connection with the construction of a railway crossing across the river from Isakogorki station to Arkhangelsk, the project of which was also carried out by Lengiprotrans.
The highway bridge was designed and built in the 1960s and is located on the 1198 km of the Leningrad-Murmansk highway (the current name is R-21 "Kola").
In the early 1980s, Lengiprotrans developed a project for a railway bridge over the Volkhov River in the Volkhov District of the Leningrad Region. The structure was designed as part of the construction of the second tracks of the Volkhovstroy — Koshta line, which is part of the Petersburg — Vologda railway. The project was driven by the prospect of increasing freight traffic between St. Petersburg and the industrial regions of North-West Russia.
During the Soviet period Lengiprotrans was actively involved in the design of transport infrastructure in the Baltics. This was largely due to the development of approaches to ports in the Baltic Sea. In the capital of Lithuania - Vilnius, the Institute has designed the largest number of overpasses.
In the 1970s, Lengiprotrans engineers developed projects for two road overpasses on the Drujos highway, which is the southern bypass of the central part of Vilnius. The structures are located at the intersection with the Subačiaus and Povilo Višinskio streets.
During the Soviet period, Lengiprotrans took an active part in the transport development of railway approaches and stations at the seaports in the Baltic States. For the development of the Ventspils station, the institute has designed an overpass in the railway park located in the Ventspils port area.
Ventspils is an out-of-class railway station on the Ventspils - Tukums II line in the city of the same name in Latvia. It was opened in 1901 with the original name Vindava. The station carries out the transit of goods from the seaport to the railroad.
The railway bridge across the Yuribey River is the longest bridge crossing beyond the Arctic Circle. The facility is located on the Obskaya — Bovanenkovo railway line, the project of which was developed by Lengiprotrans in the 1980s for the development of the Bovanenkovskoye and Kharasaveyskoye oil and gas fields. Due to the economic crisis of the late 1980s, the pace of construction slowed down significantly. In 2004, a decision was made to resume construction, within the framework of which a bridge was erected over the Yuribey River.
