École supérieure d'ingénieurs des travaux de la construction de Paris

Arcueil–Cachan is a station on the line B of the Réseau Express Régional, a hybrid suburban commuter and rapid transit line. The station takes its name from its location near the city of Arcueil and inside the town of Cachan.

Laplace is a station on the line B of the Réseau Express Régional, a hybrid suburban commuter and rapid transit line. It is located in the city of Arcueil.

Bagneux–Lucie Aubrac (French pronunciation: ​[baɲø lysi obʁak]) is a Paris Métro station in Bagneux, Hauts-de-Seine. It is the southern terminus of Line 4, and was built as part of a two-station southward extension from Mairie de Montrouge, the previous terminus of the line. The adjacent station is Barbara. The station opened in January 2022. In future, the station will be served by Paris Métro Line 15.

Barbara (French pronunciation: ​[baʁbaʁa]) is a station of the Paris Métro on Line 4 in Montrouge and Bagneux. The station was built as part of a two-station southward extension from Mairie de Montrouge to Bagneux–Lucie Aubrac. It opened in January 2022.

Arcueil (French pronunciation: [aʁkœj] (listen)) is a commune in the Val-de-Marne department in the southern suburbs of Paris, France. It is located 5.3 km (3.3 mi) from the center of Paris.

Bagneux station (French: Gare de Bagneux) is a station on the line B of the Réseau Express Régional, a hybrid suburban commuter and rapid transit line. The station takes its name from its location near the city of Bagneux, Hauts-de-Seine, but the station itself is inside the town of Cachan.

Montrouge (French pronunciation: [mɔ̃ʁuʒ] (listen)) is a commune in the southern Parisian suburbs, located 4.4 km (2.7 mi) from the centre of Paris. It is one of the most densely populated municipalities in Europe. After a long period of decline, the population has increased again in recent years.

Bagneux (French pronunciation: [baɲø] (listen)) is a commune in the Hauts-de-Seine department, in the southern suburbs of Paris, France. It is located 7.7 km (4.8 mi) from the center of Paris.

Cachan (French pronunciation: [kaʃɑ̃] (listen)) is a commune in the southern suburbs of Paris, France. It is located 6.7 km (4.2 mi) from the center of Paris. The prestigious École normale supérieure Paris-Saclay and École Spéciale des Travaux Publics are located there.

The canton of Montrouge is a French administrative division, located in the arrondissement of Antony, in the Hauts-de-Seine département (Île-de-France région). Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Montrouge.

Mairie de Montrouge (French pronunciation: ​[mɛʁi d(ə) mɔ̃ʁuʒ]) is a station of the Paris Métro on line 4 situated in Montrouge. Opened in 2013, it was the first new station of Line 4 in almost one hundred years. The station served as the southern terminus of Paris Métro Line 4 until January 2022, when the southward extension towards Bagneux opened as part of phase two.

The canton of Cachan is an administrative division of the Val-de-Marne department, Île-de-France region, northern France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Cachan.It consists of the following communes: Arcueil Cachan