[1] On August 2, 1839, the current section linking La Défense to the Viroflay connection was put into service as part of the line from Paris-Saint-Lazare to Versailles-Rive-Droite.

On July 12, 1849, the section between the Viroflay connection and La Verrière station was opened in turn, as part of the line from Paris-Montparnasse to Brest.

This electrification is accompanied by the generalization of high platforms, the replacement of its ancient steam traction equipment, much criticized for its discomfort, by modern “Standard” trains, which remained emblematic of the Saint-Lazare suburb for more than fifty years .

Its objective is to serve the Center for New Industries and Technologies or CNIT, but this stop is then considered temporary and is only open during events.

In the future, the tangential line U will correspond with the western extension of the RER E (Éole), to Mantes-la-Jolie, from its current terminus of Haussmann - Saint-Lazare.

The Main Lines network serves Versailles-Chantiers station with the stopping of some Intercity or TGV trains.

It does not work during the special night service set up on the occasion of important events such as the Music Festival and New Year's Eve, between 1 a.m. and 5 a.m. A study, published in the newspaper 20 minutes presented this link as the penultimate of Île-de-France in terms of respect for timetables, because it is a transverse link directly influenced by traffic from Montparnasse and Saint-Lazare networks and to be part of saturated traffic between La Défense and Saint-Cloud, and between Versailles-Chantiers and Saint-Quentin-en-Yvelines.

All the stations on the line are equipped with the "Infogare" information system, funded by the Île-de-France region and the Île-de-France transport union: screens located on the platforms and in the stations provide timely information travelers of the waiting time train as well as disruptions that may occur on the line.

In addition, it has nearby a washing machine, a pit tower and a preparation site for cleaning and small maintenance operations.

At the start of 2017, according to SNCF estimates, the number of passengers going up daily in the line's stations was 52,000 on a basic working day (Tuesday or Thursday), 16,000 on Saturday and 10,000 on Sunday.