!!!Sudan: Transportation ||National air transport system|''number of registered air carriers'': 6 \\ ''inventory of registered aircraft operated by air carriers'': 25 \\ ''annual passenger traffic on registered air carriers'': 496,178 \\ ''annual freight traffic on registered air carriers'': 13,161,592 mt-km (2015) \\ ||Civil aircraft registration country code prefix|ST (2016) ||Airports|74 (2013) ||Airports - with paved runways|''total'': 16 \\ ''over 3,047 m'': 2 \\ ''2,438 to 3,047 m'': 10 \\ ''1,524 to 2,437 m'': 2 \\ ''under 914 m'': 2 (2013) \\ ||Airports - with unpaved runways|''total'': 58 \\ ''2,438 to 3,047 m'': 1 \\ ''1,524 to 2,437 m'': 17 \\ ''914 to 1,523 m'': 28 \\ ''under 914 m'': 12 (2013) \\ ||Heliports|6 (2013) ||Pipelines|gas 156 km; oil 4,070 km; refined products 1,613 km (2013) ||Railways|''total'': 7,251 km \\ ''narrow gauge'': 5,851 km 1.067-m gauge; 1,400 km 0.600-m gauge for cotton plantations (20014) \\ ||Roadways|''total'': 11,900 km \\ ''paved'': 4,320 km \\ ''unpaved'': 7,580 km (2000) \\ ||Waterways|4,068 km (1,723 km open year round on White and Blue Nile Rivers) (2011) ||Merchant marine|''total'': 2 \\ ''by type'': cargo 2 (2010) \\ ||Ports and terminals|''major seaport(s)'': Port Sudan \\