In the development of growth corridors, it is essential to find a common strategic vision beyond the administrative boundaries in order to avoid partial optimisation. The study focused on linking the Western Finland provinces of Central Ostrobothnia, Ostrobothnia and Southern Ostrobothnia to the main growth corridor of Finland running from Tampere to Helsinki, and on international level connections to Umeå and further afield to Mo i Rana in Norway. The study summarised the current state of development of the research area and the needs for development. Two case studies were carried out: A) Identify hinterland second level nodes connections north of Tampere; and B) Passenger traffic from roads to rail and ferry in the Tampere-Seinäjoki-Vaasa-Umeå growth corridor. The project provided a common cross-border regional development plan for policymakers, which set sout recommendations for the development of passenger and cargo traffic along the growth corridor with the aim of strengthening business co-operation, natural and cultural heritage and good East-West transport connections. The work was carried out under the umbrella of the North Sea Baltic Sea Transport and Growth Corridor project (NSB Core), which aimed to develop the infrastructure, transport and land use of the North Sea Baltic TEN-T corridor for sustainable and accessible freight and passenger transport.