During this period, Poland successfully managed to fuse the territories of the three former partitioning powers into a cohesive nation state. Railways were restructured to direct traffic towards Warsaw instead of the former imperial capitals, a new network of national roads was gradually built up and a major seaport, Gdynia, was opened on the Baltic Coast, so as to allow Polish exports and imports to bypass the politically charged Free City of Danzig. Also, the Polish government embarked on the creation of the Central Industrial Region (''Centralny Okręg Przemysłowy''). The project's goal was to create an industrial center in the middle of the country that included steel mills, power plants and factories.