This station has the particularity of constituting a Y, since it is common to the Robinson and Saint-Rémy-lès-Chevreuse branches, which separate shortly before, on the Paris side.

During the renovation of the line by the Compagnie du chemin de fer métropolitain de Paris (CMP) in the 1930s, a flying junction was created to avoid conflicts between trains traveling in the opposite direction at the junction.

In the early 2000s, this station was the subject of major works consisting of creating a new access leading directly to the connecting corridor, the installation of three elevators (one for each platform) and the renovation of the historic passenger building.

After the separation the central platform in two, there is an electrical substation and, remembering the Sceaux line before the RER, a metro logo carved out of hedges.

In addition, another particularity of this station, the service plans were the first of the new generation to be installed on the RER A/B network.