After the first, initial workshop held on 13th February 2019, following the project plan, technical workshops with stakeholders on the transport field (road, rail, maritime, air) will be held. The fourth workshop brought together key stakeholders from air transport. The methodology and questionnaire for the analysis were presented. The analysis includes identifying stakeholders, the collection states, storage and sharing of data, technical capabilities of existing systems and processes, and identifying co-operation and processes among stakeholders. During the workshop, the participants of the Study visited the newly built passenger terminal of the Split airport. In the forthcoming period, a technical workshop will be held for railway transport and teleconferencing workshops for every transport field.