The French region of Île-de-France, encompassing the capital city of Paris, currently has nine operational modern tram lines – counting Lines 3a and 3b as separate lines – and is planning additional lines. Of the existing lines, seven are operated by its public transport authority, RATP, which also operates the Paris Métro and most bus services. One line (T4) is operated the French national rail operator SNCF. Three of the lines serve Paris. The eight lines are generally unconnected, although connections between lines T2 and T3a, and T3a and T3b, already exist, with additional connections between lines T1 and T5 opened in 2013 and between lines T1 and T8 opened in 2014; however, the final design of the entire planned tram network is fairly integrated.