Metro 1 extension project: participate in the consultation from October 5 to December 11, 2026

From 5 October to 11 December 2026, Île-de-France Mobilités is organising a new preliminary consultation on the project to extend line 1 between Château de Vincennes and Val de Fontenay, under the aegis of three guarantors appointed by the National Commission for Public Debate (CNDP).

This project aims to better connect the east of the Ile-de-France region through the creation of three new resorts: Les Rigollots, Grands Pêchers and Val de Fontenay. It would also strengthen connections with the RER A and E, the future line 15, the extension of the T1 tram and the Bus Bords de Marne.

How to participate

Public meetings, thematic workshops, local meetings...: several ways of expressing oneself will be proposed. The first public opening meeting will be held on Thursday, October 8 at 7 p.m. at the Jean-François Voguet theater in Fontenay-sous-Bois.