The Ülemiste - Maardu railway line is a connecting section of the Ülemiste - Muuga railway in Estonia.
In the 1980s, Lengiprotrans was engaged in the reconstruction of the site to create convenient approaches to the seaport of Muuga.
In 1983, during the survey, groundwater analysis was carried out, mine workings and well columns were prepared.
In subsequent years, the site was designed:
• double-circuit high-voltage line 10 kV and low-voltage networks;
• auto-blocking and automatic cleaning of switches from snow;
The Shotkusa-Megrega railway line runs in the North-West of Russia, through the territories of the Leningrad Region and the Karelian Republic.
The railway line was built according to the Lengiprotrans project in the 1970s.
The railway line Petrasiunai (Pakruojis) - Radviliskis is a section of the Lithuanian railways.
In the Baltic republics of the USSR, narrow-gauge railways prevailed, which complicated their operation and increased the cost of transportation. In the 1980s, Lengiprotrans developed the re-seaming of such sections to a wide track of 1520 mm. In 1982, the Petrasiunai - Radviliskis section was put into operation.
The railway line Pskov — Daugavpils — Vilnius is a section passing through the territory of Russia, Latvia and Lithuania.
The project of the second tracks on the site was developed by Lentransproekt (since 1951 — Lengiprotrans) in the late 1930s – early 1940s.
The Petrashunai - Gubernia railway line is a section of the Siauliai - Birzai line of the Lithuanian railway. The road was built as a single-track, narrow-gauge, 750 mm gauge.
In the period 1981-1985, Lengiprotrans developed a project for rebuilding the Petrashunai-Gubernia railway line to a wide track of 1520 mm in order to create a convenient transport connection between the republics and increase the throughput.
The Bologoye - Riga railway line is the main direction of the meridional route associated with the delivery of goods to the seaport of the city of Riga.
In the period 1951-1955, Lengiprotrans developed a project for the second tracks on the site. More than 260 km out of 619 km of the route passed through the territory of Latvia.
The Kuibyshev Railway (KZD) is one of the largest steel highways in Russia, passing through the Penza, Samara, Ulyanovsk, Tambov, Chelyabinsk, Ryazan, Orenburg regions and the Republics of Bashkortostan, Tatarstan and Mordovia.
In the 1990s, on the instructions of KZD, Lengiprotrans carried out an engineering-geological survey of a section at 981–982 km of the railway and developed anti-landslide measures.
The Tabashino - Yaransk railway line is a section of the Yaransk - Yoshkar-Ola railway, passing through the territories of the Kirov region and the Republic of Mari El. The line was designed by Lengiprotrans in the 1960s – 1970s.
The Yaransk Territory has historically developed as one of the largest agricultural centers of the Vyatka province, supplying food not only to it, but also to the neighboring districts of the Kostroma and Nizhny Novgorod province. However, the economic development of the region was complicated by the lack of a railway.
Железнодорожная линия Комсомольск-на-Амуре — Советская Гавань является восточным участком БАМа. Она была сооружена в годы Великой Отечественной войны с целью переброски войск и снаряжения на Дальний Восток России, необходимых для ведения войны с Японией.
The Baikal-Amur Mainline, built in the 20th century, is still one of the largest transport construction projects in the world. "Lentransproekt" (since 1951 - "Lengiprotrans") from the moment of its formation took part in the design of the BAM. Design and survey work at BAM has a long history, consisting of several stages.
In 1937 "Lentransproekt" organized a complex expedition to carry out the final surveys of the Bureya (Ust-Niman) - Komsomolsk railway line. 6 complex parties worked on the track, including tunnel and hydrometric ones.
