Within axis 2: The methodology developed to meet the objective of reducing noise and particle emissions when braking vehicles is based on the fact that these two types of nuisances come from contacts rubbing with the heart, tribology involving surfaces, materials and mechanical systems. It is a question of activating these different levers, in connection with the conditions of use (solicitation exercised) to limit emissions at the source. For this, experiments will be coupled with multiphysics and multi-scale modelling in order to identify the tribological and physico-chemical mechanisms and thus define the solutions limiting these emissions. Specific tribological test equipment integrating vibration-emission-environment aspects will be developed specifically within the FRICTION platform (LaMcube). As part of the CPER RITMEA and its axis 4, we propose to develop a methodology and tools for the observation of mobilities and the collection of displacement data. These data will then make it possible to synthesize the population of agents for activity-oriented simulations.