Abstract
Because of the heterogeneous and complex structure of the product transport it is extremely difficult to determinate in advance the effects of changes in the supply of transport. A better insight can be attained if in practice the level of demand can be determinated. After a brief summary of the general relevance of the experiments to transport policy one of the experiments now in progress, i.e. the so-called regional taxi-bus in the province of Drenthe which has been in service since 1978, will be analysed in more detail.