RB Rail, the project company for the Rail Baltica high-speed rail (HSR) line, the development company for the new Polish transport hub CPK and the Czech infrastructure manager SZ have signed a Memorandum of Understanding (MoU) for cooperation on HSR in north-eastern Europe. The MoU aims at an exchange of know-how between the parties in the field of HSR, primarily to expand HSR in the respective countries and beyond their borders.