M12 extension to Mairie d’Aubervilliers

As part of the 2007-2013 State-Region project agreement, phase 2 of the M12 extension to the centre of Aubervilliers includes the construction of two new stations – Aimé Césaire and Mairie d’Aubervilliers.

Using the tunnel constructed during phase 1 of the M12 extension project, two new stations will be created, bringing the centre of Aubervilliers to within 6 minutes of Paris-Porte de la Chapelle. Phase 2 of the extension also covers the construction of two technical structures (ventilation and emergency access), and the adaptation of an additional access point at Porte de la Chapelle, to improve accessibility for persons with reduced mobility. The M12 extension will also connect with the Front Populaire station, once the T8 extension towards Paris is completed.

Useful information:

  1. Département 93

  2. Connections with the RER C and E // M1, M2, M4, M6, M8, M10, M13, and M14 // T2, T3a, and T3b

  3. Future connections with T8


Two new stations:

  • Aimé Césaire: with 4 access points, including one equipped with an elevator, to serve an estimated 15,000 passengers each day.
  • Mairie d’Aubervilliers: 7 access points, including two equipped with elevators, to serve an estimated 22,000 passengers each day.
  • Trains will run every 2 minutes during peak hours
  • Travel time between Aubervilliers and Paris-Saint- Lazare: 20 minutes

Service quality

  • Modern, innovative stations: the two new stations will incorporate modern architecture and amenities, blending glass, metal, and concrete. Passenger spaces will be designed to guarantee smooth traffic flows and optimal safety conditions.
  • A low energy consumption, geothermal heat exchange system will be integrated in the foundations to meet the energy needs of the Mairie d’Aubervilliers station.

In this booming sector northeast of Paris, the M12 extension will meet its goal of bringing the centre of Aubervilliers to within 6 minutes of Paris.

In Aubervilliers, the M12 will serve an area with more than 330,000 residents and an employment basin with nearly 150,000 workers.

Key figures

Two new stations will be created, and the M12 extension is expected to serve an additional 37,000 passengers each day.


  • 2012-2014: preliminary work; rerouting of utilities networks
  • 2014-2016: preparatory work prior to the construction of 2 new stations
  • 2016-2018: station excavation and construction of internal structures. Tunnel amenities.
  • 2018-2019: finishing and furnishing of the 2 new stations
  • 2019: trial runs without passengers
  • 2020: adaptation of the additional access point at Porte de la Chapelle to improve accessibility for persons with reduced mobility
  • Srping 2022: start-up of service at the Aimé Césaire and Mairie d’Aubervilliers stations

M12 Extension: Soil Nitrogen Freezing - How Does it Work?

Extension M12 - Platform - RATP
Extension M12 - Platform - RATP
Extension M12 - Platform - RATP

Informations pratiques

Pour en savoir plus sur le projet : https://www.prolongement-metro12.fr/

Metro Line 12