Since the 1930s, Lentransproekt (since 1951 - Lengiprotrans) has been developing methods for strengthening and treating the roadbed on railway lines. Significant work was carried out to strengthen the Volga landslide slopes, primarily the Ulyanovsk and Batrak slopes.
The Tuapse - Adler railway line is part of the North Caucasus Railway. This is a narrow strip, bounded on the left by the Caucasus Mountains and on the right by the Black Sea. The key problem on the route is rockfall from the upland side and wave action from the sea.
In the 1950s, Lengiprotrans conducted a major expedition to select the direction of the railway line in the Ob-Irtysh basin. The road was supposed to facilitate the development of forests in the North of Western Siberia.
To select the direction of the route, aerial photography at a scale of 1: 30,000 was widely used. On-site office photogrammetric processing of images, production of contact prints and reproductions was carried out. Topographic work on the binding of aerial photography was carried out by 4 survey parties.
