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Various techniques are employed depending on the condition of the existing road. Each process will improve skidding resistance, seal the surface to prevent ingress of water and prevent further deterioration of the top surface. In addition a number of processes will improve the structural strength, reduce tyre noise and improve riding quality.

This is required when the road has reached the end of its life. Due to the way that the Island’s roads have evolved there is insufficient depth of construction in many of these, and it requires us to remove the old materials and start again, building the road up in layers.

This process has been adopted to save on the use of new imported materials. Where the existing road structure is of suitable material, this can be reused in the new construction. The material is strengthened by the addition of cement or bitumen and relayed as a base for the road. This is then overlaid with a new surface.

Specialist contractors are employed through competitive tendering for a number of these processes.