Today, Line 13 connects the western part of Paris to the suburbs of Asnières-sur-Seine, Gennevilliers, Clichy, Saint-Denis and Saint-Ouen-sur-Seine in the north and to Malakoff, Vanves, Châtillon and Montrouge in the south.

[1] Annual traffic grew by about ten million passengers after the opening of two new stations on the Asnières branch on 14 June 2008.

[2] Line 13's use of two northern branches serving highly populated areas, its long length, extension into the suburbs, and rapid development of areas that it serves have culminated in the line's overloading, further highlighted by associations representing passengers.

On 28 December 1901, the Société du chemin de fer éléctrique souterrain Nord-Sud de Paris, or Nord-Sud Company, obtained a concession from the City of Paris to build a rapid transit network of two lines concurrent with the more prominent CMP, which had already opened the first lines of the Métro.

Due to the narrow width of Rue d'Amsterdam, Berlin (renamed to Liège) station was built unusually with non-aligned platforms.

The electrical supply also needed to be changed; the Nord-Sud Company used overhead power, while the CMP relied on third rail technology.

It is not rare for passengers to wait for several trains to load before being able to board due to the sheer volume of users.

This has in turn required the installation of platform screen doors to prevent passengers from falling onto the tracks when no train operator is on board.

At the end of 2010, it was revealed that ten stations would receive platform screen door installation in an attempt to increase the average speed of trains and reduce track-related incidents.

After a test a few years earlier, the RATP decided that such doors must be built as crowding increases so that passengers cannot fall off the platform; to do this, the agency recruited the Kaba Group to perform automation and installation on Lines 1 and 13.

On 29 December 2009, the RATP announced that Miromesnil would be the first of twelve stations to be equipped with these doors and that work would begin in June 2010, finishing three months later.