Île-de-France tramway Line T11 Express (known as the Tangentielle Nord and Tram Express Nord during the planning phase) is a suburban tram-train line in France.

The line, when completed, is planned to be 28 kilometres (17 miles) long, running from Sartrouville to Noisy-le-Sec, from the northwestern to the northeastern suburbs of Paris.

The project, which was granted approval in May 2008,[2] was planned by Syndicat des transports d'Île-de-France (STIF) and jointly managed by SNCF and Réseau Ferré de France (RFF).

[3] Work on the initial section of the line started in 2009, and it opened on June 30, 2017.

It consists of 7 stations from Epinay-sur-Seine to Le Bourget stations,[4] for a total travel time of 15 minutes, an average speed of around 50 km/h (31 mph) and sections allowing maximum speed of 100 km/h (62 mph).