The North Sea-Baltic Corridor connects the ports of the Eastern shore of the Baltic Sea with the ports of the North Sea. The corridor will connect Finland with Estonia by ferry, provide modern road and rail transport links between the three Baltic States on the one hand and Poland, Germany, the Netherlands and Belgium on the other. Between the Odra River and German, Dutch and Flemish ports, it also includes inland waterways, such as the "Mittelland-Kanal". The most important project is "Rail Baltic", a European standard gauge railway between Tallinn, Riga, Kaunas and North-Eastern Poland. Achievements: During the last five years there have been improvement works on the outskirts of Warsaw and major track upgrading on the existing 1520 mm alignment in Estonia. In Latvia, construction is ongoing on upgrading the 1520 mm line (Rail Baltica), both south and north of Riga. In Lithuania, following the economic crisis and the lack of funds available the authorities decided to install a dual gauge 1435/1520mm track between the Polish border and Kaunas rather than construct a new 1435 mm direct line. This dual gauge is complete from the Polish border to Sestokai and works have started on the remaining sections to Kaunas which need to be completed by 2015.In Poland, work should start on a new direct 1435 mm line from Elk to the LT border and widening and modernising the line from Bialystok to Elk. The Polish authorities indicate that the new lines will be ready by 2023 the estimated date of the finishing of the Rail Baltic construction.