The second project to extend the T1 to the west towards Nanterre and Rueil-Malmaison was declared of public interest at the end of 2020 and is currently in the study phase. It will connect the "Petit-Colombes" stations to "Château de Malmaison". With 15 stations spaced 500 metres apart on average over 7.5km, the line will allow new connections with the RER A and the L line of the Transilien, but also with the future line 15 of the metro.
Plan

Key-Figures
4 minutes
between each tram during rush hour
15
Stations
7.5 km
of tracing
64,000 passengers
daily
26 minutes
between Petit-Colombes and Château de Malmaison
Calendar
- 2017-2018Preliminary studies (Objectives and Main Characteristics File)
- From 7 November 2016 to 31 January 2017Prior consultation
- 2017 to February 2019Preliminary studies and continuous consultation (Schematic diagram / Public utility inquiry file)
- From September 18 to October 18, 2019Public inquiry
- October 8, 2020Declaration of public utility
- Today2024-2025Complementary, Preliminary Design and Project Studies