Transport in Slovakia is possible by rail, road, air or rivers. Slovakia is a developed Central European country with a well-developed rail network (3,662 km) and a highway system (854 km). The main international airport is the M. R. Štefánik Airport in the capital, Bratislava. The most important waterway is the river Danube used both by passenger, cargo and freight ships. The two most important harbours in Slovakia is Komarno harbour and Bratislava harbour. Railways total: 3,662 km (2008) broad gauge: 99 km of gauge - used for freight transport only, see Uzhhorod - Košice broad gauge track standard gauge: 3,473 km of gauge (1,588 km electrified; 1,011 km double track) narrow gauge: 50 km (45 km of gauge; 5 km of gauge) Slovakia has a range of railway connections, connecting all of Slovakia and the rest of Europe. There are lots of railway operators on there railway with the main one being ZSSK. The railway network is very dense in the western and eastern part of Slovakia. The one high speed rail line in Slovakia is the Rychlik between Bratislava and Kosice (Via Zillina). The top speed of the line is 200 km/h (125 mph). The Rychlik was established in 2002 after ZSSK took over ZSR. Most of the country's railways are run tas REX (Regional EXpress) which operates at speeds between 140 km/h (83 mph) and 160 km/h (100 mph). Passenger train operators ZSSK Rychlik - High speed rail passenger trains ZSSK REX - Regional express trains Leo express - Inter city railway Regio jet - Inter city trains Railjet - High speed rail passenger trains operated by the OBB Cargo train operators The main cargo train operator is ZSSK cargo for cargo freight rail in Slovakia. Rail links with adjacent countries Czech republic Austria Poland Hungary Ukraine Roads See also: Classes and categories of public roads in Slovakia total: 43,761 km paved: 38,085 km (including 384 km of expressways) unpaved: 5,676 km (2018) Slovakia has a total of 43,761 km of roads in their country with 3,594 km being main or national road with 13,969 km being secondary and regional roads and 854 km (530 mi) being highways and the rest are other roads. Highways Motorways in Slovakia 543 km (337 mi) (2022) D1: Bratislava - Trnava - Trenčín - Považská Bystrica - Žilina, Liptovský Mikuláš - Jánovce, Prešov - Košice - Záhor(SK/UA border) D2: Kúty (CZ/SK