The development of Ro-Ro ships has been going on continuously for more than 180 years. Its historical development begun in Scotland where the first ferry carrying Ro-Ro cargo is primarily applied, and in this case railway wagons. Ro-Ro ships are being developed parallel with integrated and multimodal transport because they themselves are part of this type of transportation. In the 1960s, a large number of short lines were established in the North and Baltic Seas, which are now being revived. The advantages of Ro-Ro boats were initially visible on shorter distances, but later they also showed them on long distances. The lowest cost per unit of cargo compared to other systems as a primary advantage of ro - ro technology is provided by good transhipment standards and today is successfully combined with other technologies. The exclusive purpose of Ro-Ro boats is to transport cargo on wheels. In the introductory part of the paper, the author analyzes and interprets and describes the development of Ro-Ro boats through certain historical periods, and then describes the modern Ro-Ro ship and its basic characteristics. In the second part of the paper, the author analyzes the traffic of Ro-Ro boats in the Adriatic sea in the last 5 years. In this regard, the author offers some conclusions and suggestions. In the last part of the paper (Conclusion), concluding remarks on the topic are given.