!!!Cambodia: Transportation ||National air transport system|''number of registered air carriers'': 4 \\ ''inventory of registered aircraft operated by air carriers'': 10 \\ ''annual passenger traffic on registered air carriers'': 1,103,880 \\ ''annual freight traffic on registered air carriers'': 2,301,260 mt-km (2015) \\ ||Civil aircraft registration country code prefix|XU (2016) ||Airports|16 (2013) ||Airports - with paved runways|''total'': 6 \\ ''2,438 to 3,047 m'': 3 \\ ''1,524 to 2,437 m'': 2 \\ ''914 to 1,523 m'': 1 (2013) \\ ||Airports - with unpaved runways|''total'': 10 \\ ''1,524 to 2,437 m'': 2 \\ ''914 to 1,523 m'': 7 \\ ''under 914 m'': 1 (2013) \\ ||Heliports|1 (2013) ||Railways|''total'': 642 km \\ ''narrow gauge'': 642 km 1.000-m gauge \\ ''note'': under restoration (2014) \\ ||Roadways|''total'': 44,709 km \\ ''paved'': 3,607 km \\ ''unpaved'': 41,102 km (2010) \\ ||Waterways|3,700 km (mainly on Mekong River) (2012) ||Merchant marine|''total'': 544 \\ ''by type'': bulk carrier 38, cargo 459, carrier 7, chemical tanker 4, container 4, liquefied gas 1, passenger 1, passenger/cargo 6, petroleum tanker 8, refrigerated cargo 11, roll on/roll off 4, vehicle carrier 1 \\ ''foreign-owned'': 352 (Belgium 1, Canada 2, China 177, Cyprus 4, Egypt 4, Estonia 1, French Polynesia 1, Gabon 1, Greece 2, Hong Kong 10, Indonesia 2, Ireland 1, Japan 1, Lebanon 5, Russia 50, Singapore 3, South Korea 10, Syria 22, Taiwan 1, Turkey 15, UAE 2, UK 1, Ukraine 35, (2010) \\ ||Ports and terminals|''major seaport(s)'': Sihanoukville (Kampong Saom) \\ ''river port(s)'': Phnom Penh (Mekong) \\