!!!Bangladesh: Transportation ||National air transport system|''number of registered air carriers'': 6 \\ ''inventory of registered aircraft operated by air carriers'': 30 \\ ''annual passenger traffic on registered air carriers'': 2,906,799 \\ ''annual freight traffic on registered air carriers'': 182,692,553 mt-km (2015) \\ ||Civil aircraft registration country code prefix|S2 (2016) ||Airports|18 (2013) ||Airports - with paved runways|''total'': 16 \\ ''over 3,047 m'': 2 \\ ''2,438 to 3,047 m'': 2 \\ ''1,524 to 2,437 m'': 6 \\ ''914 to 1,523 m'': 1 \\ ''under 914 m'': 5 (2013) \\ ||Airports - with unpaved runways|''total'': 2 \\ ''1,524 to 2,437 m'': 1 \\ ''under 914 m'': 1 (2013) \\ ||Heliports|3 (2013) ||Pipelines|gas 2,950 km (2013) ||Railways|''total'': 2,460 km \\ ''broad gauge'': 659 km 1.676-m gauge \\ ''narrow gauge'': 1,801 km 1.000-m gauge (2014) \\ ||Roadways|''total'': 21,269 km \\ ''paved'': 2,021 km \\ ''unpaved'': 19,248 km (2010) \\ ||Waterways|8,370 km (includes up to 3,060 km of main cargo routes; network reduced to 5,200 km in the dry season) (2011) ||Merchant marine|''total'': 62 \\ ''by type'': bulk carrier 25, cargo 28, chemical tanker 1, container 5, petroleum tanker 3 \\ ''foreign-owned'': 8 (China 1, Singapore 7) \\ ''registered in other countries'': 10 (Comoros 1, Hong Kong 1, Panama 5, Saint Vincent and the Grenadines 1, Sierra Leone 1, Singapore 1) (2010) \\ ||Ports and terminals|''major seaport(s)'': Chittagong \\ ''river port(s)'': Mongla Port (Sela River) \\ ''container port(s)'': Chittagong (1,392,104) (2011) \\ ||Transportation - note|the International Maritime Bureau reports the territorial waters of Bangladesh remain a risk for armed robbery against ships; in 2014, attacks against commercial vessels increased to 21 over 12 such incidents in 2013