Keywords used in appropriate technology:
Hill Roads : Roads in hilly and mountainous terrain.
Landslides : The slippage of mass of hill face.
Retaining Walls : Structures constructed to retain the fill portion in hill roads.
Breast Walls : Structures constructed to buttress uphill slopes of hill roads.
Check Walls : Small retaining structures provided in series to arrest landslides.
Gabion Walls : Walls made up of stones encased in wire mesh or geogrid cages.
Parapet Walls : Walls constructed for protecting vehicles from falling into the valley in hill roads.
Marshy Area : Area which is water-logged and swampy.
Sand Drains : Vertical drains constructed to facilitate upward movement of water from underlying saturated soil.
Dunes : Mounds formed by deposit of wind-blown fine sand in deserts.
Gravel Roads : Roads having a surfacing of naturally occurring or blended material.
Appropriate Technology : Technology using equipment like tractors, disc harrows, tillers, rooters and rotavators.