Water movements in road pavements and embankments may be a critical threat against their efficient, reliable and economical performance. Water that comes from rain and/or from the ground may weaken the road structure and materials so that the pavement cracks or ruts faster than it should, and it sometimes carries contaminants from the construction into the surrounding ground and into streams and lakes. Working under the umbrella of European Union, the COST (Co-operation in the field of Science and Technology) 351 group after three years of evaluation of the best practice in combination with research outputs, has come to some ‘best advice’ conclusions. This information are going to be presented in detail during the final dissemination Workshop that will be hosted in Athens on the 20^th of June 2007, as a parallel event of the Athens-07 International Conference on the Advanced Characterisation on Pavement and Soil Engineering Materials. Among others, presentations and discussion will include: