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
Budapest Castle Hill Funicular but the construction works were delayed. A midibus service between the two termini (line "V") was launched in 1975. This was in operation until the line was finally reopened in 1986. The line has the following technical parameters: The line is operated by the BKV (Mass Transport Company of Budapest), and operates from 07.30 to 22.00 each day. It is subject to special fare. Budapest Castle Hill Funicular The Budapest Castle Hill Funicular or Budavári Sikló is a funicular railway in the city of Budapest, in Hungary. It links the Adam Clark Square and the Széchenyi Chain Bridge at river