Qazvin-Rasht-Anzali railway has a total length of 235 km, and the design and supervision of the infrastructure of parts 5A, 8,7,6, the connection to the Caspian port and the mainlines of the Caspian port with a length of about 77 km, as well as the paving of the entire route, are assigned to this consulting engineers.  The mentioned railway is one of the main project of the north and south corridors of the country and in line with the international corridors, and by connecting it, 10 million tons of cargo will pass through it annually with transit priority. The 2670 meter Susar Rogah bridge is one of the largest bridges in this project.