In the 1970s – 1980s, Lengiprotrans developed a project for second tracks with electrification on the Kokchetav (now Kokshetau) - Tselinnye Sands - Presnogorkovskaya section by decree of the CPSU Central Committee and the USSR Council of Ministers.
According to the instructions of the Ministry of Railways (MPS), it was assumed that the increase in the throughput of this road would be carried out according to the traditionally established stages: starting with double-track inserts on limiting tracks, followed by a transition to continuous second tracks. However, Lengiprotrans, in the process of designing the reinforcement of this railway line, substantiated and defended in the examination of the Ministry of Railways the need to design and build a second track at once along the entire length of the section, abandoning the uneconomical gradual construction of double-track inserts. This was agreed by the expertise, approved by the Ministry of Railways and carried out by construction.
