The aforementioned railway is one of the main bottlenecks of the north and south corridor of the country which is along the international corridors, with which connection, 10 million tons of cargo are allowed to pass through annually with transit priority. 77 Km of the design and supervision of the route infrastructure including sections 5A, 6, 7, 8, the connection to Caspian Port and the main lines of Caspian Port, and the pavement of the entire route for about 235 Km long, all have been carried out by this Consulting Engineers.

The Saucer Roga bridge with length of 2,670m is one of the largest bridges on this axis.