\r\nDescribed as the \u201cbackbone" of the railway network, FNS is considered to be a crucial part of the national logistics system because it links virtually all of the country\u2019s existing and planned freight railways.\r\nAt present, the only operational section of FNS is the 720km stretch between A\u00e7ail\u00e2ndia in Maranh\u00e3o state and Palmas, the capital of Tocantins state. The concession for this section was awarded to mining company Vale in 2007 and subcontracted to its VLI Log\u00edstica subsidiary.\r\nThe latest concession comprises the central and southern sections of FNS, which have a combined length of 1537km.\r\nFewer trains\r\nOne of the major changes made by TCU concerns the purchase of locomotives and wagons. Initially it was planned to grant a 30-year concession for the two sections, which link Porto Nacional in Tocantins with Estrela D\u2019Oeste in S\u00e3o Paulo state. The concessionaire would be required to buy 113 locomotives and 3795 wagons to operate freight services on the route.\r\nThe TCU\u2019s revised projections for the project cut the fleet requirement by 14 locomotives and 416 wagons, reducing the required investments by Reais 246.2m ($US 63.5m).\r\nThe FNS concession will be awarded to the highest bidder in the upcoming auction. The government has already reduced the starting bid from Reais 1.6bn to Reais 1bn, and the price will be subject to further adjustment to accommodate the lower-than-anticipated investment in rolling stock and the fact that works will not be carried out by the state-owned Valec.\r\nAnother important pending decision concerns access to the infrastructure. Located in the central region of the country, FNS lacks direct links to Brazil\u2019s ports. Trains will therefore need to use the infrastructure of five other concessionaires to reach the ports of Santos in S\u00e3o Paulo state or Itaqui in Maranh\u00e3o.\r\nIt has therefore been decided that all concessionaires with links to FNS, including the Caraj\u00e1s Railway, VLI, Transnordestina, MRS Log\u00edstica and Rumo, will have to sign an addendum to their current contracts to allow the new concessionaire\u2019s trains to transit their routes.