New mass transit was planned for Greater Tunis in 2009. This was the RTS (rapid rail network), the local equivalent of the Paris RER, which was to carry tens of thousands of travellers from the distant suburbs of Tunis to the centre by using either existing tracks or new tracks yet to be built. The plan was for lines based on certain criteria such as population density and the lack of coverage for a given area. Among the priority lines were: Tunis-Borj Cédria (23 km) where modernization and electrification are already planned; Tunis-Mohamedia-Fouchana (19.4 km); Tunis-Manouba-Mnihla (19.2 km); Tunis-Ezzouhour-Sidi Hassine Séjoumi (13.9 km). In addition, the TGM will be integrated into the light-rail network and a new line built around Ayn Zaghouan and Bhar Lazrag (8.4 km). Such an operation would require the upgrading of the docks' TGM stations so that they become suitable for light rail trains. Among other projects are a line to the city of Ennasr (8.4 km) and the extension of the Tunis-Ettadhamen to Mnihla (1.7 km). For its part, the south light-rail line was extended in November 2008 to El Mourouj with a length of . The total length of the network will eventually be in the range of .