Main road 21 (Hungary)

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.^[1]

Main road 21
21-es főút
Route information
Length	65 km (40 mi)
Major junctions
From	M3 near Hatvan
Major intersections	23 in Bátonyterenye 22, 211 in Salgótarján
To	Somoskőújfalu border with  Slovakia I/79
Location
Country	Hungary
Counties	Heves, Nógrád
Major cities	Hatvan, Lőrinci, Pásztó, Bátonyterenye, Salgótarján
Highway system
Roads in Hungary Highways Main roads Local roads

The road, like all other main roads in Hungary, is managed and maintained by the state-owned company Magyar Közút.