Metro Line M4 (Budapest Metro) Metro Line M4 (Budapest Metro) Line 4 (officially: South Buda–Rákospalota (DBR) Line, Metro 4 or M4, and unofficially: Green Line), is the fourth line of the Budapest Metro. It opened on 28 March 2014. The first section, 7.4 km in length and consisting of ten stations, connects the southwestern Kelenföld vasútállomás located in Buda, and the eastern Keleti pályaudvar in Pest, under the River Danube. While three additional sections — one an eastern extension to Bosnyák tér, the second west to Virágpiac, and a third further east to Újpalota — have been planned, these remain unfunded by the Budapest city
Demographics of Budapest Demographics of Budapest The population of Budapest was 1,735,041 on 1 January 2013. According to the 2011 census, the Budapest metropolitan area was home to 2,530,167 people and the Budapest commuter area (real periphery of the city) had 3.3 million inhabitants. The Hungarian capital is the largest in the Pannonian Basin and the ninth largest in the European Union. Budapest is also the primate city of Hungary and some neighbouring territories. The Capital city of Budapest was established on 17 November 1873 with the unification of three separate towns, named Buda, Óbuda and Pest. In 1720 Buda and Óbuda had