Saulx-les-Chartreux

Champlan (French pronunciation: [ʃɑ̃plɑ̃] ) is a commune located 16 kilometres (10 mi) to the southwest of Paris, in the Essonne department in Île-de-France in northern France. Although now completely enveloped in the Paris Metropolitan Area, the town has conserved its rural character in spite of its direct proximity to the capital, and thus retains its slogan of "Champlan, the meadow of Paris".

Villejust (French: [vilʒyst] ) is a commune in the Essonne department in Île-de-France in northern France.

Palaiseau (French pronunciation: [palɛzo]) is a commune in the southern suburbs of Paris, France. It is located 16.9 km (10.5 mi) from the centre of Paris. Palaiseau is a sub-prefecture of the Essonne department and the seat of the Arrondissement of Palaiseau. Inhabitants of Palaiseau are known as Palaisiens.

Ballainvilliers (French: [balɛ̃vilje] ) is a commune in the Essonne department in Île-de-France in northern France.

The canton of Palaiseau is an administrative division of the Essonne 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 Palaiseau.It consists of the following communes: Igny Orsay Palaiseau

La Ville-du-Bois (French pronunciation: [la vil dy bwa] ) is a commune in the southern suburbs of Paris, France. It is located 40 km (25 mi) from the center of Paris.

Palaiseau–Villebon station is one of the four RER B stations of Palaiseau, near Paris, France.

Longjumeau (French pronunciation: [lɔ̃ʒymo] ) is a commune in the Essonne department, France. It is located 18.2 km (11.3 mi) south from the center of Paris. Inhabitants of Longjumeau are known as Longjumellois (French pronunciation: [lɔ̃ʒymɛlwa]) in French.

Palaiseau station is one of the four RER B stations in the city of Palaiseau.

Longjumeau Station is one of two station in Paris' express suburban rail system, the RER C, in the city of Longjumeau. An interchange with tramway T12 is available.

Massy-Palaiseau station (French: Gare de Massy-Palaiseau) is a train station in the city of Massy. It is a junction of the RER B, RER C, Transilien Line V and tramway Line 12. In the future, Paris Metro Line 18 of Grand Paris Express will stop here in the future. It is a station in this southern outer suburb of Paris, with a connection to the Massy TGV station.

Massy TGV station (French: Gare de Massy TGV) is a TGV railway station in Massy, France. The station was built along the LGV Atlantique and serves as a transfer point to the regional rail system that stops at the nearby Massy-Palaiseau station.