The 2026 preliminary consultation

From 5 October to 11 December 2026: a time of dialogue to guide the decision on the future of the project

The consultation takes place at a time when the project can still evolve. It provides an opportunity to discuss the appropriateness of the project, its objectives and characteristics, socio-economic and environmental issues, land use planning, accessibility, alternatives to the project – including the absence of a project – and the proposed variants. Residents, users, associations, economic actors and elected officials are invited to get informed, to exchange and to express their opinions and make proposals.

The contributions or arguments collected will help to decide on the continuation of the project and, if it is continued, to make it evolve as closely as possible to the needs, to orient the studies and to deepen a variant. In this case, the CNDP will appoint guarantors to continue the information and participation of the public in continuous consultation, before a new public inquiry.

Encadré par des garantes indépendantes

This time of dialogue is held under the aegis of the National Commission for Public Debate (CNDP). Three guarantors appointed by the CNDP — Nathalie Durand, Marie-Liane Schützler and Caroline Werkoff — ensure the completeness of the information and the quality of the participation.

Neutral and independent, they do not express an opinion on the substance of the project. At the end of the consultation, they will publish an independent report, which presents the arguments of the public (questions, observations and proposals). Île-de-France Mobilités will respond within two months with the lessons it learns from the consultation and the follow-up given to the project.

To contact the guarantors: [email protected]

How can I find out about the project?

Consult the consultation file, available on the project website, in town halls and at scheduled meetings.
Consult the summary leaflet of the consultation file and the terms of participation, boxed in the perimeter of the project, available on the project website, in town halls and at scheduled meetings.
This website dedicated to the project as well as videos to understand it.
The Facebook page "Métro 1 Prolongement".
1 illustrated podcast, available from 5 October to understand the challenges of inserting the connection of the extension of Metro 1 in the Bois de Vincennes. It is recommended to follow it before coming to the dedicated sectoral workshop

How to participate?

Workshops and indoor meetings will be open to all, within the limits of the safe capacity of the rooms and within the limit of the maximum capacity for the workshop format.

Workshop registration links will be open: 1 week before each workshop at 7pm.

Opening Public Meeting

Thursday 8 October from 7 pm to 10 pm
Théâtre Jean-François Voguet, Fontenay-sous-Bois
in-person and online

Workshop 1: Socio-economic issues and alternatives to extension

Monday 12 October from 7 pm to 10 pm
Espace 40, Place Gisèle-Halimi, Montreuil
on registration within the limit of available places

Workshop 2: Environmental issues of the project

Focus on integration in the Bois de Vincennes

Tuesday 10 November from 7 pm to 10 pm
Est-Passeleu School, Vincennes
on registration within the limit of available places

Workshop 3: Integration of the Les Rigollots station

Focus on land use planning and accessibility

Tuesday 17 November from 7 pm to 10 pm
Louis-Pasteur School, Fontenay-sous-Bois,
on registration within the limit of available places

Workshop 4: Integration of the Grands Pêchers station

Focus on land use planning and accessibility

Thursday 19 November from 7 pm to 10 pm
Espace 40, Place Gisèle-Halimi, Montreuil
on registration within the limit of available places

Workshop 5: Integration of the Val de Fontenay resort

Focus on land use planning and accessibility

Tuesday 24 November from 7 pm to 10 pm
Salle Rosa-Parks, Fontenay-sous-Bois,
on registration within the limit of available places

Workshop 6: Location of the rear station and the train breakdown centre

Focus on land use planning

Thursday 26 November from 7 pm to 10 pm
Municipal village hall, Neuilly-Plaisance
on registration within the limit of available places

Closing Public Meeting

Thursday 3 December from 7 pm to 10 pm
Salle des fêtes, town hall, Vincennes
in-person and online

Booths to learn and participate

Vincennes

Thursday 15 October from 4 pm to 7 pm
Château de Vincennes station, Metro 1 on the bus station side

Rosny-sous-Bois

Tuesday, October 27 from 4:30 pm to 7:30 pm
Forecourt of the Metro station 11 Rosny-Bois-Perrier

Fontenay-sous-Bois

Thursday, November 5 from 4:30 pm to 7:30 pm
Carrefour des Rigollots in Fontenay-sous-Bois
Monday 16 November from 4.30 pm to 7.30 pm
In front of the RER A Val de Fontenay, on the bus station side

Montreuil

Thursday 12 November from 4 pm to 7 pm
In front of the Super U, Montreuil

Nogent-sur-Marne / Le Perreux-sur-Marne

Tuesday 1 December from 4.30 pm to 7.30 pm
Forecourt of the Nogent-Le-Perreux RER E station, on the Nogent-sur-Marne side

How to participate remotely?

An online form will be available from 5 October on this website.
A pre-paid T card distributed with the leaflet (paper format) to allow each person to send their notice free of charge by La Poste.
The stakeholders' notebook for companies, local authorities and associations: the model will also be available for download from 5 October. It will be submitted on this site via the online form.
Self-supported debates for all in the planned framework: this kit will also be available from 5 October.

Targeted meetings by invitation to deepen certain topics of the project

1 information meeting for the owners of properties located in the project study area (invited by mail). This meeting will inform them about the studies in progress, the assumptions of rights-of-way and the next steps in the procedures likely to be implemented.
1 walk on environmental issues in the Bois de Vincennes for a representative panel of its stakeholders (local authorities, associations, direct residents, environmental experts, etc.), by invitation, in compliance with the maximum possible gauge for this format.