\r\nThe RRX network is intended to bring a consistently high-quality fast regional rail service to Germany's most densely-populated region, with trains running at 15-minute intervals on the core Dortmund \u2013 Cologne line. Because of the size of the network, operation has been tendered as three separate contracts, with VRR announcing the preferred bidders in June.\r\nLot 1 will begin in December 2018 and will be operated by Abellio's German subsidiary Abellio Rail NRW. The contract covers the operation of around 6.2 million train-km per year on lines RE1 (Aachen - Cologne - Essen - Hamm) and RE11 (D\u00fcsseldorf - Essen - Dortmund - Hamm - Kassel).\r\nThe other two contracts will be operated by National Express. Lot 2 covers the operation of around 6 million train-km per year on lines RE5 (Koblenz - Cologne - D\u00fcsseldorf - Wesel) and RE6 (Cologne\/Bonn Airport - Cologne - D\u00fcsseldorf - Essen - Hamm - Minden), while Lot 3 covers 2.4 million train-km per year on Line RE4 (Aachen - M\u00f6nchengladbach - Hagen - Dortmund). Lot 2 begins in June 2019, while Lot 3 starts in December 2020.\r\nVRR managed the procurement on behalf of four other public transport authorities: North Hessen (NVV), Westphalia-Lippe (NWL), Rhineland-Pfalz North (SNNV-Nord), and Rhineland (ZVNVR).\r\nSiemens will supply 82 four-car Desiro High Capacity EMUs to a special purpose vehicle set up by the tendering authorities, which will then lease the trains back to the two operators. Siemens will maintain the fleet for 30 years.