The contract involves the installation of high and low-voltage equipment powered by eight 20 KV delivery substations and six transformer substations. In terms of data cabling the project involves implementing the fibre-optic network, voice-data-image network, video surveillance, telephony, intercom, access control and intrusion detection, along with the centralised technical management system. The contract also includes implementation of the architectural and functional lighting in the two new stations, plus safety lighting in the tunnel and its nine ventilation shafts.
The RER E line western extension project (EOLE) at the heart of the Grand Paris Express was officially declared to be in the public interest on 31 January 2013. The RER E line western extension project (EOLE) aims to construct 55 kilometres of track, including 8 kilometres through a tunnel, to convert 47 kilometres of existing track and to create three new stations: Porte Maillot, La Défense-CNIT and Nanterre-la-Folie. Upon completion, 620,000 passengers will use this new RER line every day.
Eiffage Énergie Systèmes had already won in october 2018, within the joint venture Alise, the contract to comprehensively implement the electrical architecture of Grand Paris Express Line 15 South.