Transilien Line V is a railway line serving the southwestern part of the Île-de-France region. It connects Versailles Chantiers and Massy–Palaiseau. It belongs to the Transilien network operated by SNCF, the French national railway. Unlike the other Transilien lines (with the exception of Line U), Line V lies completely outside the city limits of Paris.
Before December 2023, the line was operated as a branch of RER C. On 4 December 2023, the line was separated from the RER C and became a shuttle line, in preparation for the opening of the T12 Express tramway line on 10 December 2023. The line was officially designated line V on 15 December 2024.[1]
History
The tracks that Transilien Line V operates over were built as part of the Grande Ceinture line. Construction of the line began after August 1875 when it was declared of public utility. The section that the Line V operates over opened as part of the section of railway line between Juvisy and