National Highway 4C

National Highway 4C
Quốc lộ 4C
Happiness Road
Location
CountryVietnam
Highway system

National Highway 4C (Quốc lộ 4C) is a national highway in Hà Giang province in northern Vietnam. It links Hà Giang City with the highland areas of the Dong Van Karst Plateau Geopark and includes the road section over Mã Pí Lèng Pass. The highway is widely associated with the route commonly known as the "Happiness Road" (Con đường Hạnh Phúc), built from 1959 to 1965 as a road-access project for the plateau areas.