use of the overhead wire) was . The infrastructure also contains 5,422 railway crossings (level crossing), 4,168 of which employ an automatic signaling system. At the same time 1,497 crossings are staffed 1,468 out of those equipped with automatic signaling system (grade crossing signals). Standard gauge (1,435 mm) As of May 2022, Ukraine had many stretches of standard gauge rail, although several had not seen use for decades. The 80-kilometre-long railroad from Kovel railway station to Yahodyn railway station near the Ukrainian–Polish border was the longest standard-gauge track in Ukraine at the time; in May 2021, Ukrainian Railways started electrifying and modernising this route. Specialised freight fleets at Kovel station compatible with the European network had not been in use for almost 30 years, however. From Chop to Mukachevo and to the railway station at Nevetlenfolu (Diakovo) in Zakarpattia, large sections of rail track are of European width as well. Since the 2010s, but especially since the February 2022 Russian invasion of Ukraine, much urge has been given to plans to build new standard-gauge connections between the largest cities and EU countries, and switch over parts of the Ukrainian network from 1,520 mm to standard gauge. Although switching the entire network over quickly would not be realistic, the construction or renewal of standard-gauge border crossings were deemed viable options to be prioritised. In February 2021, plans were drafted by the Ministry of Infrastructure for building four sections with a total length of 2,000 km, with a top train speed of over 250 km/h. The first and longest of these would be a 896 km-long track between Kyiv and Lviv, onwards to the Ukrainian-Polish border. The plans also included standard-gauge rail between Chernivtsi and Siret, Romania, as well as restoring the European gauge between Chop and Uzhhorod. Restoration of the Mostyska-1 to Rodatychi standard-gauge track is also under discussion. Narrow gauges (750 mm) Various gauge railways operate in Ukraine as common carrier, industrial railway or children's railways. Rail links with adjacent countries Same gauge: Belarus. Closed due to the 2022 Russian invasion of Ukraine. Russia. Crimean Bridge opened in 2019 under Russian occupation. Closed due to the 2022 Russian invasion of Ukraine. Moldova. One link, requires transit through Transnistria, temporarily closed due to invasion. Another link through Transnistria was closed for several decades before August 2022. Break-of-gauge: / Romania Hungary Poland (plus a broad gauge cross-border cargo line, the Linia Hutnicza