The T4 branch departs from Gargan Station in the Pavillons-sous-Bois commune, which will also be the terminus of the forthcoming T Zen 3. It will partially cross the Town of Livry-Gargan (de la République and Marx-Dormoy Boulevards and Léon-Blum Avenue), then Clichy-sous-Bois (Romain-Rolland and Maurice-Audin Alleys),and Montfermeil (Utrillo Street, Jean-Jaurès Avenue, 8-Mai-1945 Street, Général-Leclerc Street, and Henri-Barbusse Street) where the T4 is intended to make a one-way loop round a terminus near the intercommunal hospital centre. The loop along Henri-Barbusse Street has been delayed.