The modernization of the Elin Pelin - Kostenets railway section from km 62 + 400 to km 73 + 598 includes new railway track, catenary network, systems and equipment of external power supply and external lighting of the station areas, as well as construction of video surveillance systems and passenger information systems. 8 single-tube tunnels for a double railway line with an approximate total length of 5,478 m, two viaducts with an approximate total length of 1005 m and 11 bridges with an approximate total length of 777.70 m, as well as noise protection facilities with an approximate length of 1066 m and drainage facilities will be built. The Nemirovo stop is also included in the scope of the project for the modernization of Separated Position 3.