Three Belgian regions, Polis members Brussels and Flanders, together with the Walloon region, have agreed on a road user charging test project, to study the impact of such a tax on driver behaviour. The will use 1200 participants from different socio-economic groups within the Brussels Regional Express Network (GEN) area to asses the behavioural change that would be induced by the charge. The tests will investigate the impact on mobility, choice of routes, choice of modes, and will investigate the link betw