The T11 express tram-train project was put into service in 2017 between Épinay-sur-Seine and Le Bourget over 11 km. It was to be extended west to Sartrouville and east to Noisy-le-Sec to reach 28 km.

But this work is not planned immediately. “I tend to no longer believe in it”: in Val-d'Oise, what future for the extension of the T11?. The shock was severe.