Purpose: Although there is a considerable effort from the EU and the National Member States to improve the intermodal transport, there is still a lack of use of the inland waterway transport. This is due to infrastructural restrictions, policy restrictions, the absence of critical information sharing, etc. Some of these barriers generate bottlenecks. The objective of this study is to identify these bottlenecks and their possible sources in the intermodal logistics network. The study was part of the EU-project "Development of a Next generation European Inland Waterway Ship and logistics system (NEWS)" . For this reason, the river Danube and its hinterland were the main items of the investigation. Furthermore, an in-depth analysis of the route between Vienna and Novi Sad was conducted. Methods: In this study, the strength of expert interviews is used to identify bottlenecks in an intermodal logistics network especially on the inland waterway transport. For this purpose, six interviews with experts in three different countries and from different groups of the network were conducted. Results: Bottlenecks were identified on the river Danube and its hinterland. On the waterway, the bottlenecks are caused by nautical circumstances and from locks and bridges. It was not possible to identify any general bottlenecks in the nodes of the network. To find the individual bottlenecks of the different ports in-depth studies for every one of them should be conducted similar to the detailed analysis of the route between Vienna and Novi Sad in this study. Apart from the infrastructural bottlenecks, delays in running-times are caused by the inefficient use of the river information system (RIS). Furthermore, there are problems caused because Serbia is not a member state of the EU. That is why there is no valid policy framework along the whole waterway. To solve the detected bottlenecks a stronger cooperation between political stakeholders beyond the national borders and the introduction of incentive systems in both the private and the public sector is needed.