The Main road 21 is a south–north direction First class main road in the valley of the Zagyva river, that connects the Hungarian M3 motorway's Hatvan junction, facilitating access from the capital city of Hatvan to Salgótarján-Somoskőújfalu. The road is 65 km long.Magyarország, autóatlasz 1:200.000, Honvédelmi Minisztérium Térképészeti Kht., .
The road, like all other main roads in Hungary, is managed and maintained by the state-owned company Magyar Közút.
Sources
See also
Roads in Hungary Transport in Hungary
External links
Hungarian Public Road Non-Profit Ltd. (Magyar Közút Nonprofit Zrt.) National Infrastructure Developer Ltd.