Abstract
Within the framework of a rapidly growing international trade, the E.E.C. exchanges between State Members are rapidly expanding with direct consequences on traffic. The existing infrastructure is not able to face it and hard bottlenecks almost permanent on main European itineraries are likely to become bigger. Switching of traffic from road to rail is only a part of solution. Therefore E.E.C. has to consider European transport system as a whole and to pay more attention to possibilities of European marine transport, the so called "cabotage". In this respect, conditions of a really possible development are described.