In the 1980s, Lengiprotrans engineers designed various objects in the Baltics. Thus, by order of the Baltic Railway, Lengiprotrans has developed a project for a railway overpass across the Leningrad — Tallinn highway at the intersection with the connecting railway lines of the Ülemiste — Maardu section. As a result, an important intercity highway with heavy traffic was developed.
In the 1980s, Lengiprotrans engineers designed various projects in the Baltics. One of them was the overpass at the intersection of the road to the Pribaltiyskaya GRES with the railways of the USSR Ministry of Railways. During the implementation of the project, level crossings were eliminated at one level of the railway and an important city highway with heavy traffic and pedestrian traffic. As a result, the size of the car traffic has increased and its safety has increased.
The project of a road bypass for Narva and Ivangorod with a bridge over the Narva River was developed by Lengiprotrans in the 1990s - early 2000s. During the implementation of the project, level crossings were eliminated at one level of the railway and an important city highway with heavy traffic and pedestrians. As a result, the size of car traffic has increased and its safety has increased.
In the 1950s and later, Lengiprotrans engineers worked on various transport facilities in the Baltics. The design of a road bridge across the Narva River solved the transport problems of Narva and the Narva HPP. Thanks to the implementation of this project, a rational interchange of road traffic was organized, and a large overrun of urban transport was also eliminated.
In the second half of the 1980s, Lengiprotrans engineers developed a project for a road bridge over the Emajõgi River. The construction of a road bridge designed by Lengiprotrans, carried out by order of the Tartu City Administration, made it possible to solve the transport problems of the city and relieve the intensive city highways.
In the post-war years and later, Lengiprotrans engineers worked actively on various transport facilities in the Baltics. The implementation of the project of a new capital road bridge contributed to the solution of transport problems in the resort town of Pärnu. In the project, a rational interchange of traffic flows was thought out, taking into account the large number of pedestrians.
In the 1970s – 1980s, Lengiprotrans engineers worked on various transport facilities in Estonia. One of such objects, the pedestrian bridge across Oktyabrsky Prospekt in the III microdistrict of the Lasnamäe residential area, was designed by order of the Tallinn administration. The project allowed to solve transport problems with heavy traffic on the city highways and ensure the safety of pedestrians.
In the 1980s, Lengiprotrans engineers worked on a project to reconstruct a road bridge across the supply canal on the road to the Estonian State District Power Plant. This project was carried out by order of the administration of the city of Narva. Its implementation made it possible to solve transport problems associated with heavy traffic on the city highways of the Narva - Estonian TPP section.
Ülemiste is a stopping point in Tallinn on the Tallinn-Tartu and Tallinn-Narva railway lines.
In 2009–2010, Lengiprotrans took part in design work for the reconstruction of the Ülemiste railway junction. Work was carried out on the temporary removal of the contact network, overhead lines-10 kV AB and PE, fiber-optic communication cables from the tunnel construction zone on the Tallinn-Ülemiste stretch.
