The M3 starts from north-eastern part of Budapest, it connects the Hungarian capital with Nyíregyháza and northeast part of Hungary, towards Mukachevo. The motorway is part of the Venice-Trieste-Ljubljana-Budapest-Lviv-Kyiv line Central-East Europe Corridor V, and European route E71, E79, E573 and E579. This is one of the most important route of the Hungarian motorway and road network, the southwest-north-eastern diagonal main line of traffic forming part of Budapest. Through Ukraine, Eastern Europe, and through Slovakia, creates a highway connection to the countries of north-eastern Europe.