This thesis analyses transportation systems in floating cities. In 2050, three times the amount of land currently available on earth will be needed if the current lifestyle is maintained. Because most of urbanisation is in delta areas, and because Earth’s surface consists of 70% water, floating cities could provide a solution to this problem. Floating cities, however, require new infrastructure and transportation systems for their inhabitants. The main research question is how to facilitate passenger transportation in a floating city in a feasible way, and how to evaluate the designs of these transportation systems. With feasible it is meant whether it is possible in a technical and economic sense to construct these transportation systems and whether they are safe enough for the inhabitants. A research-by-design method is chosen for this research. This method generates insight and knowledge by studying the effects of a number of design interventions in an existing situation.(Jong and Voordt) In this report, variants of both the transportation systems and the layout of the floating city are therefore considered. The criteria, chosen for this research project, are created together with the client. These criteria include keeping the advantages of current transportation systems, improving the drawbacks of the systems and case-specific criteria. Based on these research, it can be concluded that a collective transportation system with private or small vehicles is the best option.