Slope modification - Slope reduced to low angles to increase stability.
Retaining wall - Constructed of concrete, used to support road cutting sides.
Gabions - Wire mesh boxes filled with rocks, placed as lateral toe support at the bottom of slopes to prevent failure by slumping.
Rock bolts - Steel rods, several metres long, drilled/cemented into rock faces. Pin lose rock blocks to sound rock behind, preventing rock falls. Can only be used in competent rocks.
Rock drains - Drains of broken rock remove water and reduce pore fluid pressure.
Wire netting - Fix surfaces in place and catch small rock falls.
Shotcrete - Concrete sprayed at high pressure on rock surfaces increasing strength, reduces permeability and protects from surface weathering.
Vegetation - Plants fix soil in place reducing water infiltration. Effective stabilisation strategy for incompetent rocks.