This article addresses the structural characteristics of the interactions between Switzerland and the EU in the transport sector, i.e. transport by air and land. More precisely, it is focused on two different aspects of this relationship: first the modes of coordination between Switzerland and the EU according to the concept of external governance and, second, those conditions that make inclusive patterns of interaction more likely. The central finding of this case study is an expansion of both the regulatory and organisational boundary in both cases. This shift finds expression in the incorporation of Swiss actors into a variety of networks that, at least in some cases, allow Swiss actors to shape EU policy making. The actual patterns of interaction are influenced by a number of factors, including the type of governance inside the EU that facilitates the inclusion of third parties in EU external governance and the problem structure that is characterized by coordination rather than enforcement problems.