CAUSES OF THE DISINTEGRATION OF ROADS :--

FAILURE OF THE ROAD STRUCTURE AND REASONS THERE OF :-- (1) Inadequate drainage or the poor maintenance of the drainage system.(2) Bad design ,i e insufficient thickness of construction to carry the traffic load imposed (3) Faulty construction of which the the commonest example is inadequate compaction of the subgrade and the base (4) Poor surface maintenance (5) Open textured road surfaces are more liable to fail than close textured surfaces .As such the source of trouble should always be determined before making the required repairs however the surface repairs on the defective base or subgrade is a waste as such the condition of the road base should always be investigated. Undue strenghning of the weak spots may create differences in traffic wear and impact which cause additional damage to the adjoining surface areas .Every efforts should be made to reduce interference with traffic with good repair works warning signs and the barriers should be carefully sited and the maintenance material should be kept available in small dumps along the road side and preventive repair and maintenance should be carried out at the first indication of failure, and immediately it becomes necessary failing which the delay will cause minor defects to develop into the major ones as a result of the traffic action or weather.