The roads which pass through hilly terrain and leading to villages on hills are called as hill roads.

The hill roads also are classified as a national highway, state highway, village roads, major district roads and or district roads.

The camber value recommend for earth roads in hill alignment is 3.0 to 4.0%, so it should be never less than 3.0%.it may vary depending on type of road like for bitumen it is 4.0%.

The construction of hill road includes trace cut, jungle clearance, earth work excavation and rock cutting.

The landslides are not caused due to a stable rock, rar y are helpful in preventing m, ground water flow and weak soil effect landslide very easily.

The embankment slopes are normally protected with a rough stone pitching of about 0.3 m, to avoid erosion due to water flow.

The ISD value is twice value of SSD, but after 40kmph it increases slightly, so it is considered as 120m.

The minimum straight length between any two successive hair pin bend is 60 m excluding circular curve and transition curve.

The value of valley curve or summit curve may be greater depends upon deviation angle.

The cracks are not formed in summer here as re is no hot temperature, but cracks may be due to frost.