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Metro
The metro has served Paris for the last 110 years… The network is now one of the densest in the world, with 14 lines interconnected with the bus, tram and RER services. The aim now is to improve transport links by extending some lines beyond the city of Paris and thus facilitate suburb-to-suburb travel.
Four metro line extensions
Extension of line
from Porte d'Orléans to Mairie de Montrouge (phase
1) and Bagneux (phase 2)The 3.2 km extension of line 4 will concern the towns of Bagneux, Montrouge and Arcueil, as well as Paris’s 14th arrondissement. The first phase, which will extend the line to Mairie de Montrouge, is scheduled for completion by 2012.
from Porte de la Chapelle to
Proudhon–Gardinoux (phase 1) and Mairie d'Aubervilliers (phase 2)Line 12 is to be extended by 3 stations and around 3 km
between Paris and Mairie d'Aubervilliers in two main stages. Phase 1 will be completed in 2012, with the entry into service of the new Proudhon–Gardinoux
station.
> Find out more (not available in english)
Extension of line 
from Saint-Lazare to Mairie de Saint-Ouen
The extension of line 14 to Mairie de Saint-Ouen in the
north has been identified as the most efficient solution to the problem of
overcrowding on line 13. Target for entry into service: 2017.
> Find out more (not available in english)
