Tunis is served by the Tunis-Carthage International Airport. The growing metropolitan area is served by an extensive network of public transportation including buses, an above-ground light rail system (le Metro), as well a regional train line (the TGM) that links the city centre to its closest northern suburbs. Multi-lane autoroutes surround the city and serve the increasing number of privately owned cars one encounters in Tunisia.
The Tunis area is served by the m�tro l�ger and TGM (Tunis-Goulette-Marsa), as well as bus services, and is linked to other places in Tunisia by SNCFT, the national railways. The important transport authorities are the Soci�t� des Transports de Tunis (STT) and the Ministry of Transport (Airports) The A1 motorway connects Tunis with Sfax to the south, and the A3 with Oued Zarga and B�ja to the west, while the A4 is the link with Bizerte.
The city has, as of the beginning of the 21st century, a public transportation system developed under the management of the Soci�t� des transports de Tunis (STT). In addition to some 200 bus routes, the first light rail line opened in 1985. The M�tro l�ger de Tunis network has extended gradually since then to reach the suburbs. The capital is also linked to its northern suburbs by the railway line that crosses the lake, dividing the lake into two. In addition, a new mass transit is planned for the Greater Tunis in 2009. This is the RTS (rapid rail network), the local equivalent of the Paris RER, which will 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. It will be divided into lines whose priority will be based on certain criteria such as population density and the lack of coverage for a given area. Among the priorities are the following: Tunis-Borj C�dria (23 km) where modernization and electrification are already planned; Tunis-Mohamedia-Fouchana (19.4 km); Tunis-Manouba-Mnihla (19.2
