In addition of being the basis of international trade, maritime transport is of great importance for commercial trade within the European community, and gain a lot of potential development of liner passenger traffic in EU. The European Union, through the II development of the „Motorways of the Seas“ concept, encouraging coastal transport links as real alternatives to overburdened roads, aims to achieve an efficient, safe and environmentally friendly transport system. The „Motorways of the Seas“ concept, with the ultimate aim of increasing the traffic of goods and passengers in maritime transport, particularly emphasizes the importance of developing the efficiency of port, transport and port infrastructure and port hinterland which shall enable a smooth flow of traffic. In addition to the importance, also is analyzed the potential of participation of Croatian port in „Motorways of the Seas“ projects and short sea shipping, in particular the possibility of implementing the concept in the liner passenger traffic in Croatia. In the context of the implementation of the concept into liner passenger traffic, an analysis was made of liner passenger traffic on all four „Motorways of the Seas“ corridors in the European Union, particularly in the „Motorways of the Baltic Sea“ and „Motorways of the Sea of South-Western Europe“. Consequently, special attention was paid to the impact of the implementation of the of „Motorways of the Seas“ concept to the development of liner passenger traffic in these areas.