The aim of the proposed research project is to provide a better insight in the physical understanding of the interaction between tire and wet road surface. More specifically, the project targets a quantitative approach to scale from lab experimentation on rubber samples to road experiments on tires running under actual service conditions. The anticipated experimental approach is guided by the application of modern contact mechanics theories describing water dispersion on rough, road like pavements. This will lead to an enhanced understanding and quantitative assessment of the hydroplaning effect. This will in turn guide the tire design for improved performance to reduce the risk of accidents on wet roads and thus increase the traffic safety.