The Belgrade–Bar railway () is a railway connecting the Serbian capital of Belgrade with the town of Bar, a major seaport in Montenegro. Overview The Belgrade–Bar railway is a standard-gauge railway, long. Of this length, of the railway goes through Serbia, and through Montenegro. It is electrified with 25 kV, 50 Hz AC along the entire corridor. It passes through 254 tunnels of total length of and over 435 bridges (total length ). The longest tunnels are "Sozina", , and "Zlatibor", . The biggest and the best known bridge is Mala Rijeka Viaduct, long and above ground level. The highest point of the railway is at above mean sea level, at the town of Kolašin. The railway descends to 40m above mean sea level at Podgorica in a relatively short distance, thus the gradient of 25‰ on this section. A small section of the railway actually passes through Bosnia and Herzegovina, near the town of Štrpci, and three trains per day stop there in each direction (though no border police is normally present) When the line was completed in the late 1970s, it took a train approximately seven hours to complete the trip from Belgrade to Bar. Today it takes 11 hours, due to speed restrictions, as the railway cannot safely sustain the projected speeds without being thoroughly rebuilt. Stations History The decision to build the railway connection between Belgrade and Bar was made in 1952, as a national project of the Socialist Federal Republic of Yugoslavia. However, the construction was passed to the constituent Republics, SR Serbia and SR Montenegro, to build on their own. The sections of the railway were completed as follows: Resnik – Vreoci in 1958 Podgorica – Bar in 1959 Vreoci – Valjevo in 1968 Valjevo – Užice in 1972 Užice – Podgorica in 1976 The construction works were concluded on 27 November 1975, by joining the railway tracks south of Kolašin. The railway was opened on 28 May 1976. Electrification was completed at the end of 1977. Maintenance of the Belgrade–Bar railway suffered from chronic underfunding during the 1990s, which has resulted in the railway deteriorating and becoming unsafe. This culminated in the Bioče derailment, when a passenger train derailed, causing the deaths of 47 passengers. As a result, efforts are being made to thoroughly reconstruct the railway. The Serbian part of the railway was targeted several times by NATO during its bombing campaign