The project includes the modernisation of the E 75 railway line between Warsaw Rembertów – Zielonka – Tłuszcz (Sadowne) in the following scope: • Upgrading of railway lines: — No 449 on the section of Warszawa Rembertów – Zielonka, – nr 6 on the section Zielonka – Tłuz – to Sadowne Węgrowskie station (name Sadowne Węgrowskie according to the Basic Description of the Network) together with the stations: Zielonka, Wołomin, Tłuz, Łochów • the addition of two new tracks on the section Zielonka – Wołomin Słoneczna (designed for suburban traffic) In addition, the project includes works related to the preparation of touring line No. 10 Legionowo – Tłuz to take over the traffic during the modernisation works on the railway line E 75. The implementation of the project was divided into: • Phase I – works/services planned to be performed under the OPI 2007-2013 • Phase II – works/services planned to be performed under the OPI 2014-2020. The section of Warsaw Rembertów – Zielonka – Tłuz (Sadowne) is a fragment of the railway line E 75 Rail Baltica Warsaw – Bialystok – the border of the state with Lithuania, forming part of the core network corridor North Sea – Baltic Sea, listed in Annex 1 to the Regulation of the European Parliament and of the Council (EU) No. 1316/2013 of 11 December 2013 The Corridor of the Corridor is connected with the transport section of Tallinn – Riga-Kowno-Warsaw, it is the only connection between the European Parliament and the Council of the European Parliament and the Council (EU) No 1316/2013 of 11 December 2013, part I.2, section of Tallinn – Riga-Kowno-Kowno-Warsaw, it is the only rail connection between the European Parliament and the Council, it is the only rail connection to the Baltic Sea, part of the Baltic Sea, the section of Tallinn – Ryga – Kowno – Warsaw, is the only rail connection between the European Parliament and the Council. The project is located in the area of Mazowieckie voivodship within the following powiats: M. St. Warsaw, Wolominski and Węgrowski.