In 1930-1940s Lengiprotrans developed the general layout of the Riga railway junction. It was of strategic importance for the economic development of the Republic of Latvia and the Soviet Union as a whole, since Riga was a large transit center, where cargo was transshipped from the railway to port ships in the Baltic Sea.
Muuga Port is a commercial sea port in Estonia on the shores of the Muuga Bay, which is part of the Gulf of Finland. It was built in 1986 to transport grain crops to the USSR; in the future, it was also planned to build an oil terminal.
For the new port, Lengiprotrans completed the design of an access road, a port station and an abutment station. Connecting routes were designed from Lagedi and Ülemiste stations to Maardu station and further to the new Muuga pre-port station with an exit from it to the port. The total volume of track laying is 38 km.
In 1954, a large-scale development of virgin and fallow lands began in the Kazakh SSR and a number of adjacent regions. The Council of Ministers of the USSR adopted a Resolution on the construction of railway lines in the region, the design of most of which was entrusted to Lengiprotrans.
As part of this, the institute has developed a project for the railway Kostanay (now Kostanay) - Uritskoye - Peski - Volodarskoye - Kokchetav (now Kokshetau). The road was designed as a narrow-gauge one. The design and survey work had a tight deadline.
On September 20, 1954, the Council of Ministers of the USSR adopted Resolution No. 1985 “On the construction of narrow-gauge railway lines in the areas of virgin and fallow lands development”. The design of most of the facilities was entrusted to Lengiprotrans.
As part of this, a normal gauge railway line Irtyshskoe - Karasuk - Kamen-na-Obi was designed, which later became the eastern link of the Central Siberian Railway. The road passed through a flat, treeless area.
In the pre-war period, Lentransproekt (from 1951 — Lengiprotrans) designed the Karaganda-Balkhash railway line in the Kazakh SSR. The road is a continuation of the meridional highway Petropavlovsk — Akmolinsk (now Astana) — Karaganda. The line was necessary to transport ore from the Pribalkhash and Kounrad deposits to the Balakhsh plant and further to the north.
During the Soviet period Lengiprotrans designed a number of railway post offices. One of the first was Rizhsky, whose successful design solution was noted by the Ministry of Communications and the Ministry of Transport Construction of the USSR. In this regard, the institute was instructed to develop projects for other post offices, including Saratov.
The project of the railway post office in Saratov was developed in 1961-1965. The work was carried out simultaneously with the reconstruction of the Saratov railway station.
The Losevo - Kamennogorsk railway line is a section of the Oktyabrskaya railway in the direction of Ruchyi-Petyayarvi - Kamennogorsk - Vyborg. Lengiprotrans has developed a project for the construction of the Losevo - Kamennogorsk line for the reconstruction of the St. Petersburg - Buslovskaya - Helsinki railway line for organizing high-speed passenger traffic and transferring freight traffic to the ports of the Gulf of Finland Vysotsk, Primorsk and Vyborg.
