The rapid development of traffic, in particular commercial vehicles (CVs) within the last ten years, the development of the design of commercial vehicles and the variations in climate due to disturbances in the atmosphere have led to increased pavement damage. These changes have led to reviews of flexible pavements by several international research actions which have resulted in important conferences and publications.

This report is based on a questionnaire sent to all member countries represented in C8 (responses received from 19 countries) and on cooperation with the PIARC Technical Committees on Surface Characteristics (C1) and on Earthworks, Drainage, Subgrade (C12) and on a recent literature review.

It is hoped to develop guidance for decision-makers for both the network and the project level.