This project will provide an opportunity to develop the ideas and findings of the SEBTrans project with a certain focus on the North-South Corridors. Partners from Sweden, Poland, Lithuania and Russia/Kaliningrad region will continue the work in this Interreg IIIB project, now with the ambition to support a fast and qualified preparation process for investments and other initiatives to improve accessibility in the road-, rail and sea transport networks. Background The SEBTrans project identified strong demand for improved infrastructure in the SEBTrans Corridors. In the North-South Corridor, building the A1 motorway (Gdynia – Lodge) in Poland is a first priority together with improving the section within Sweden (Gothenburg – Borås – Växjö – Karlskrona). Road improvements promote local, regional and interregional cohesion most efficiently in the short term, though rail also needs improvements to be able to reach long term sustainable transport networks. Port infrastructure should be developed in co-ordination with the hinterland links.