this report discusses the reasons for the differences between pavement engineering in temperate climates and in developing countries with tropical or sub-tropical climates. the importance of earth and gravel roads in developing countries is emphasised, and commonly used methods of pavement design for bitumen surfaced roads are described and compared. recent developments in techniques and equipment for improving construction standards and for assessing road performance are described. the use of appropriate forms of contract is briefly discussed and the need to improve knowledge of the factors which would enable total transport costs to be minimised is emphasised.(a)

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